Surface & Radiological Anatomy (3rd Ed) (Gnv64)
Surface & Radiological Anatomy (3rd Ed) (Gnv64)
Surface & Radiological Anatomy (3rd Ed) (Gnv64)
Radiological
ANATOMY
Third Edition
A. Halim
Surface and
Radiological
ANATOMY
THIRD
EDITION
Surface and
Radiological
ANATOMY
THIRD
A. Halim
EDITION
MBBS M S F I M S A
CBS
Disclaimer
Science and technology are constantly changing fields. New
research and experience broaden the scope of information and
knowledge. The author has tried his best in giving information
available to him while preparing the material for this edition of
the book. Although, all efforts have been m a d e t o ensure
optimum accuracy of the material, yet it is quite possible some
errors might have been left uncorrected. The publisher, printer
and the author will not be held responsible for any inadvertent
errors or Inaccuracies.
Surface and
Radiological
ANATOMY
Third Edition
ISBN: 978-81-239-1952-2
Copyright Author and Publishers
Third Edition: 2011
Reprint: 2013
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my s t u d e n t s
n preparing the third edition of this book which has been well received for
almost over two decades, I have retained the earlier version for its easy approach
to the subject. The diagrams of surface anatomy in Part I have been coloured
since colour captures a reality that is more consistent with the mode of learning
and has become an increasingly important element for most of the students today.
Apart from this, instead of abbreviated labelling full labelling of the figures has
been done for better understanding.
In Part II the radiographs by repeated printing had become indistinct and have
been mostly replaced by photographs of digital X-ray plates for their clarity. New
ultrasonographs, computerised axial tomographs and MRI photographs have
been put in.
The new imaging techniques have replaced contrast radiographic techniques
like bronchography and cholecystography. Ultrasonography of hepatobiliary
system, for example, is more sensitive than cholecystography in detecting small
stones and biliary sludge and moreover the patients are not exposed to radiation.
Contrast radiographs have their anatomical value to the student so chapters
dealing with these have been retained.
I hope that the changes which have been made will facilitate the understanding
of the text.
A. Halim
Acknowledgements
A. Halim
The second section deals with radiological anatomy. The value of X-rays for the
study of anatomy need not be stressed. It has been the aim to organise and to set
down as concisely as possible w h a t are considered basic facts of normal
radiographic anatomy. Radiographs of different regions of the body in standard
positions have been given with well elucidated parallel line diagrams and
elaborate descriptions. The third chapter in this section has been specially written
for the purpose of bone age estimation. Line diagrams depicting the sequence of
ossification of union in different regions have been specially prepared to help
student in assessing the bone age. A large number of radiographs of different
age groups have been added to give the student an exercise on age determination
on the basis of sequence of ossification and union in that region. Three tables to
help the student better have been compiled.
Techniques of radiological procedures are described particularly those dealing
with the more complicated diagnostic procedures such as bronchography.
The care of the subject before and after such investigations has also been given as
the student should have some idea of what the examination entails and the way
it is conducted.
There is a separate chapter on angiography which is one of the more specialised
area of diagnostic radiology. Aortography and cerebral angiography has been
dealt with in some detail. Some of the more advanced techniques are out of the
scope of this elementary book and hence have been left out.
At the end a chapter on the new imaging devices has been added to give the
student some idea of these body-scanning techniques which have revolutionised
diagnostic medicine in the past two decades.
A. Halim
Contents
Preface to the Third edition
Preface to the First edition
vii
ix
INFERIOR EXTREMITY
22
THORAX
36
ABDOMEN A N D PELVIS
49
HEAD A N D NECK
65
BRAIN
81
91
INFERIOR EXTREMITY
97
BONE AGE
105
THORAX
136
ABDOMEN A N D PELVIS
153
HEAD A N D NECK
177
VERTEBRAL C O L U M N
182
ANGIOGRAPHY
189
NEW I M A G I N G DEVICES
195
Index
207
Surface Anatomy
SUPERIOR EXTREMITY
INFERIOR EXTREMITY
THORAX
ABDOMEN AND PELVIS
HEAD AND NECK
BRAIN
NOTES
M Introduction
The surface anatomy deals with the study of position of structures in relationship
to the skin surface of the body. It helps in exploring these structures from the surface
wherever necessary. Bony, muscular and other landmarks on the surface of the
body are taken as guides. The landmarks may be visible or palpable.
1. Visible landmarks can be seen on inspection as they produce irregularities in the
surface outline of the body. Majority of them are produced by bones or cartilages.
Nipple and umbilicus also fall in this category.
2. Palpable landmarks are felt through the skin. Muscles and tendons become palpable
by being put into contraction, arteries by their pulsations and nerves by rolling
against bones. Spermatic cord and parotid duct can also be felt through the skin.
Important visible and palpable landmarks have been described and indicated in
diagrams. While drawing the surface marking of a particular structure, the student
is advised to put the required points first and then to join these by various lines as
instructed.
Superior Extremity
SHOULDER, AXILLA, ARM A N D ELBOW REGIONS
SURFACE LANDMARKS (Anterior Aspect) (Fig, 1.1)
t) Anterior axillary fold is formed by the rounded lower border of pectoralis major.
It becomes prominent when the abducted arm is adducted against resistance.
y Clavicular head of pectoralis major can be recognised as it contracts when the
arm is flexed to a right angle.
Q Coracoid process points almost straight forward, 2.5 cm vertically below the
junction of the lateral fourth and medial three-fourths of the clavicle. Anterior
fibres of deltoid cover it.
Coracoid process
Tip of acromion
Sternal angle
Greater tuberosity
Lesser tuberosity
Deltoid
Anterior axillary fold
Medial epicondyle
Biceps tendon
Fig. 1.1: S u r f a c e l a n d m a r k s s h o u l d e r , axilla, a r m a n d e l b o w r e g i o n s ( a n t e r i o r a s p e c t )
j Surface Anatomy
D Deltoid insertion can be identified when the arm is maintained in the abducted
position. It is half a way down the lateral aspect of humerus. Its anterior border
can also be easily seen.
O Greater tuberosity of humerus is the most lateral bony point in the shoulder
region.
Q Lateral epicondyle of humerus is readily recognisable from the posterior aspect
in the upper part of a well marked depression situated on the lateral side of the
middle line.
V) Lesser tuberosity of humerus lies 3 cm below the tip of the acromion on the
anterior aspect of the shoulder.
O Medial epicondyle of humerous is a conspicuous landmark felt easily on the
medial side in a flexed elbow.
Q Sternal angle (angle of Louis) can be easily felt as a ridge by running the finger
downwards on the sternum from the suprasternal notch. Traced laterally it leads
to second costal cartilage. The ribs can be counted downwards after the second
rib has been located.
( j Tendon of biceps becomes prominent when the elbow is flexed, it can be grasped
in the cubital fossa.
Q Tip of acromion is situated lateral to the acromioclavicular joint and can be
easily felt.
SURFACE LANDMARKS (Posterior Aspect) (Fig. 1.2)
Si Acromial angle: Lower border of the crest of the spine becomes continues with
the lateral border of the acromion at this angle.
Spines
U c1
- Acromial angle
- Greater tuberosity
- Crest of scapular spine
Wt3
U t7
- Lateral epicondyle
- Tip of olecranon
- Head of radius
Fig. 1.2: Surface landmarksshoulder, axilla, arm and elbow regions (posterior aspect)
Superior Extremity
y Apex of the olecranon can be felt well to the inner side of the mid-point of the
inter-epicondylar line in an extended elbow. The tip of the olecranon and the
two epicondyles form an isosceles triangle when the elbow is flexed.
Q Crest of the scapular spine is subcutaneous throughout. It runs downwards
and medially to reach the medial border of the bone opposite the third thoracic
spine.
Q Head of the radius is situated below the lateral epicondyle in the depression
described above, Tying in the valley behind the supinator longus (biceps)'
(Holden). It can be felt to rotate when the forearm is alternately pronated and
supinated.
Q Inferior angle of scapula can be felt at the level of the seventh thoracic spine
when the medial border of scapula is traced downwards.
y Posterior surface of the olecranon is subcutaneous and tapers from above
downwards.
Q Triceps, lateral head lies parallel to the posterior border of the deltoid. To its
medial side is the long head of triceps.
SURFACE MARKINGS
Gland
Breast (Fig. 1.3)
Put a mark at the margin of the sternum opposite the sternal angle.
Mark the sternal end of the sixth costal cartilage.
Draw the midaxillary line.
Axillary artery
Second rib
Sternal angle
Midaxillary line
Anterior axillary fold
Sixth rib
8 ./ Surface Anatomy
Put a mark on the pulsation of the axillary artery under cover of anterior axillary
fold.
Mark the second rib and cartilage.
The breast can now be indicated by drawing a circular line passing through these
various points but going u p w a r d s into the axilla u p to the axillary vessels to mark
the tail of Spence.
JOINTS
The Elbow Joint
On the front the plane of the joint can be represented as follows (Fig. 1.4a).
Put a point 2 cm below the medial epicondyle.
Mark a point 2 cm below the lateral epicondyle.
Join these points by a line directed downwards and medially. The line is oblique
because of the carrying angle and also represents the distal limit of the cavity of the
joint.
The proximal limit of the joint cavity c a n b e r e p r e s e n t e d o n t h e f r o n t of t h e a r m b y
Humerus
Humerus
Lateral
epicondyle
'Media' ,
epicondyle
Lateral
epicondyle
Medial
epicondyle
Coronoid
process
of ulna
Head of radius
(a)
(b)
Figs 1.4a a n d b:
On the back the plane of the elbow joint can be represented as follows (Fig. 1.5a).
Put a point in the depression between the head of the radius and the lateral
epicondyle.
Mark the tubercle on the medial border of the coronoid process.
Join these points by a line which also represents the distal limit of the joint cavity.
Superior Extremity
The proximal limit of the joint cavity can be represented on the back of the elbow
as follows (Fig. 1.5b).
Mark a point in the depression between the head of the radius and the lateral
epicondyle.
Put a point on the tubercle, on the medial border of the coronoid process.
Draw a line from the first to the second point by an arch a little wide of the
outline of the olecranon process.
Humerus
Humerus Lateral
epicondyle
Lateral
epicondyle
Head of radius
Tubercle of coronoid
process of
ulna
Head of radius
Tubercle ofcoronoid
process of
ulna
(a)
(b)
Figs 1.5a a n d b : E l b o w j o i n t ( b a c k )
Shoulder Joint
The joint line can be represented on the front as follows (Fig. 1.9):
Put a point on the coracoid process.
Draw a line downwards from the above point.
The joint line can be represented on the back as follows (Fig. 1.7):
Put a point on the acromial angle.
Draw a line downwards from the above located point.
NERVES
Axillary Nerve (Fig. 1.7)
Mark the mid point of the line joining the tip of acromion to the deltoid tuberosity.
Put a point 2 cm above the mid point of the above line. Draw a transverse line
from the second point across the deltoid muscle.
10
Surface Anatomy
Musculocutaneous nerve
- Coracoid process
Biceps tendon-
Median nerve
Ulnar nerve
Brachial artery
Acromial angle
Axillary nerve
Deltoid insertion
Radial nerve
Ulnar nerve
Superior Extremity |
11
Put a point at the commencement of the brachial artery by feeling its pulsation.
Mark the mid-point of the brachial artery.
Put a mark on the ulnar nerve on the back of the medial epicondyle by rolling
it.
Draw a line following the medial side of the brachial artery half-way down its
course. The line should then diverge to join the point on the back of medial
epicondyle.
SSI
VESSELS
ARTERIES
Axillary Artery (Fig. 1.3)
Put a point on the pulsation of the lower part of axillary artery on the medial
side of the arm, just in front of the posterior axillary fold.
Mark a point at the level of the neck of the radius in the middle line of the limb.
Join these points to get the surface marking.
Axillary artery
Brachial arterv
Clavicle
12
Surface Anatomy
VEINS
Axillary Vein (Fig. 1.8)
Put a point on the inner side of the arm half a way between the axilla and the
medial condyle.
Mark a point on the anterior surface of the forearm below the elbow towards the
medial side.
Join the above two points by a line.
Cephalic Vein (Fig. 1.9)
Coracoid process
Shoulder joint line
Axilla
Cephalic vein
Basilic vein
Superior Extremity
13
FOREARM
Subcutaneous surface
of olecranon
14 ./ Surface Anatomy
Q Radius, styloid process can be found by tracing the lateral aspect of the lower
end of radius downwards. It lies 1.75 cm below and slightly on a more anterior
plane than the styloid process of ulna.
O Ulna, head forms a round elevation on the medial side of the posterior aspect of
the wrist in a pronated hand.
Q Ulna, posterior border lies in the furrow on the back of a fully flexed forearm. It
extends from the subcutaneous surface of the olecranon to the styloid process of
ulna below.
Q Ulna, styloid process can be determined by following the posterior border of
ulna downwards. It will be found projecting downwards from the ulnar head.
Q Scaphoid, tubercle is situated in the base of the thenar eminence and is partly
hidden by the tendon of the flexor carpi radialis muscle. It is felt below the lower
end of radius as described above.
Q Trapezium, crest can only be recognised by applying deep pressure over the
thenar muscles below and external to the tubercle of scaphoid.
Hook of hamate-
-Crest of trapezium
Pisiform bone-
-Tubercle of scaphoid
Head of ulna-
SURFACE MARKINGS
Nerves
Median Nerve (Fig. 1.12a)
Put a point at the level of the neck of the radius in the middle line of the forearm.
Mark a point at the wrist 1 cm to the medial side of the flexor carpi radialis
tendon.
Join the above two points. At the wrist the nerve projects laterally from under
cover of the palmaris longus tendon.
Superior Extremity
15
Put a mark 1 cm lateral to the tendon of biceps at the level of lateral epicondyle
of the humerus.
Put a mark on the junction of upper and middle-third of a line joining the middle
of the posterior aspect of the head of the radius to the dorsal radial tubercle of
Lister.
Mark the dorsal radial tubercle of Lister.
Join these points by a line which in the upperpart will cross the elevation produced
by brachioradialis and superficial extensors.
Radial Nerve (Figs 1,12a a n d b )
Put a point 1 cm lateral to the tendon of biceps at the level of lateral epicondyle
of humerus.
Mark a point at the junction of middle and lower one-third of lateral border of
foream.
Mark a point in the 'anatomical snuff box'.
Join these points.
Lateral epicondyle
Head of radius
Medial
epicondyle
l Posterior interosseous
nerve
Radial nerve
Ulnar nerve
Inter-osseous nerve
Median nerve
16 ./ Surface Anatomy
Ulnar Nerve (Fig. 1.12B)
Tendon of biceps
Radial artery.
Ulnar artery
Pisiform bone
Fig.
y 1.13: Arteriesfront of forearm
Put a point in the middle line of the forearm opposite the neck of the radius.
Mark another point at the junction of the upper third with the lower two-thirds
of the forearm near its medial border.
Mark a point at the lateral edge of pisiform.
Join the first two points by a line which passes downwards and medially, across
the elevation caused by the superficial flexors of forearm, then join the second point
with the third one. Note that the ulnar artery lies lateral to the ulnar nerve.
Superior Extremity |
17
HAND A N D WRISTS
Q Flexor carpiradialis tendon. Flex the wrist against resistance. Out of the two
tendons which stand out the lateral one is that of flexor carpiradialis.
y Flexor carpiulnaris tendon. Flex the wirst against resistance. This tendon is the
medial most and will be directed towards the pisiform,
t } Hamate hook lies 2.5 cm below and external to the pisiform bone in line with
the ulnar border of the ring finger.
Elevation by pisiforr
bon
Tendon of flexor carpi radialis
Tendon of flexc
carpi ulnari
Tendon of palmaris longus
18
./ Surface Anatomy
Flexor retinaculum
Tendon of
flexor carpi radialis
Ulnar ner\
Radial artery
Tendon of flexor carpi ulnar
Median nerve
Ulnar arte
y Metacarpal heads form the prominence of the knuckles, that of the middle finger
being the most prominent.
Knuckles
Superior Extremity
19
SURFACE MARKINGS
Joints
Wrist Joint
The plane of the joint on the front (Fig. 1.18).
Draw a line across the limb 2.5 cm proximal to the ball of the tumb.
Put a point a little distal to the level of the head of the ulna.
Draw a transverse line from the above point. This will be a little lower than the
one drawn on the front.
Joint Cavity
Crease
Metacarpophalangeal joints
Wrist joint
20 ./ Surface Anatomy
RETINACULA (Figs 1.19 a n d 1.20)
Extensor Retinaculum (Fig. 1.19)
Draw a line marking the salient lower end of the anterior border of the radius
above the styloid process.
Draw a line marking the tip of styloid
process of ulna and medial side of
carpus.
Join these lines by a 2 cm broad oblique
band on the lateral and posterior aspects of
the wrist, higher on the lateral than on the
medial side.
Flexor Retinaculum (Fig. 1.20)
Flexor retinaculum
Hook of hamate
Pisiform bone
Crest of trapezium
Tubercle of scaphoid
Superior Extremity |
21
r\
Level of
extended
thumb
Superficial palmar
Deep palmar
arch
Hook of
hamate
Thenar eminence
Pisiform bone
Inferior Extremity
THIGH AND GLUTEAL REGION
Q Adductor tubercle is located by placing the flat of the hand on the medial side of
thigh just above the medial condyle of femur and then slipping the hand
downwards. The middle finger will come in contact with the adductor tubercle
and on deep pressure the cord like tendon of adductor m a g n u s will be
recognisable immediately above the tubercle,
t ) Anterior superior iliac spine can be palpated at the lateral end of the fold of
groin and is often visible.
Bryant's triangle can be drawn as below.
Spino-trochanteric
part of Nelaton's line
Nelaton's line
Ischial tuberosity
Greater trochanter
Gluteal fold
Inferior Extremity
23
Join the two anterior superior iliac spines through the back with the subject
in the recumbent posture.
Drop a perpendicular from this line to the top of the greater trochanter.
Draw a line from the anterior superior iliac spine to the top of the greater
trochanter.
When the trochanter is displaced upward the perpendicular line is diminished in
length as compared with the sound side and w h e n it undergoes a backward
displacement the spino-tronchanteric line is relatively increased in length.
y Greater trochanter of the femur lies a hand's breadth below the tubercle of the
iliac crest.
0 Iliac crest is described in section on abdomen (page 49)
Inguinal ligament is in the fold of the groin which marks the junction of the
anterior abdominal wall with the front of the thigh.
0 Mid-inguinal point is the midpoint between the anterior superior iliac spine and
the symphysis pubis.
0 Midpoint of the inguinal ligament is the midpoint between the anterior superior
iliac spine and the pubic tubercle.
0 Nelaton's line is a line joining the anterior superior iliac spine to the most
prominent point of ischial tuberosity. It crosses the apex of the greater trochanter
and the centre of the acetabulum. The extent of displacement in dislocation or in
fracture of neck of femur is marked by the projection of the trochanter behind
and above this line.
0 Tuberosity of ischium can be palpated 5 cm above the gluteal fold and about the
same distance from the median plane.
Fig. 2.2: S u r f a c e l a n d m a r k s f r o n t o f t h i g h
24
Surface Anatomy
SURFACE MARKING
Joint
Hip Joint (Fig. 2.3)
Put a point 1.2 cm below the junction of lateral with the middle-third of the
inguinal ligament.
Mark another point 1.2 cm below the junction of the medial with the middlethird of the inguinal ligament.
Join these two points to represent the joint line.
Hip joint
Saphenous opening
Adductor tubercle
Fig. 2.3: Hip joint saphenous opening and long saphenous vein
Nerves
Femoral Nerve (Fig. 2.4)
Mark a point 2.5 cm lateral to the midpoint of the line joining the posterior
superior iliac spine to the ischial tuberosity.
Put another point just medial to the midpoint of a line joining the ischial tuberosity
to the apex of the greater trochanter.
Mark the upper angle of the popliteal fossa.
Draw a broad line passing downwards and laterally through these points.
Inferior Extremity
Femoral nerve -
Femoral vein-
Femoral artery-
Adductor tubercle
Posterior superior
iliac spine
Greater trochantei
Ischial tuberosity -
Sciatic nerve
Popliteal fossa
26
| Surface Anatomy
OPENING
Saphenous O p e n i n g (Fig. 2.3)
VESSELS
Arteries
Femoral Artery (Fig. 2.4)
Take a point on the fold of groin midway between the anterior superior iliac
spine and the pubic symphysis.
Mark the adductor tubercle.
Join these points. The upper two-thirds of this line represents the artery.
Inferior Gluteal Artery (Fig. 2.6)
Put a point 2.5 cm lateral to the midpoint of the line joining the ischial tuberosity
to the posterior superior iliac spine indicating the point of entry of the sciatic
nerve into the gluteal region.
Place a point medial to the above point. Draw a line downwards indicating the
stem of the artery.
Draw a line joining the posterior superior iliac spine to the apex of the greater
trochanter.
Greater trochanter
Inferior gluteal artery
Ischial tuberosity
Inferior Extremity
27
Mark a point at the junction of the upper and middle-third of the above line.
Draw a line u p w a r d s from the above point to indicate the stem of the artery.
VEINS
Femoral Vein (Fig. 2.4)
Put a point a little below the centre of the saphenous opening (page 26)
Mark the adductor tubercle.
Join the two points by a line to represent the vein.
LEG
Q Anterior border of tibia is distinct in most of its extent except in its lower part.
y Head of the fibula forms a slight elevation on the upper part of the posterolateral aspect of the leg lying vertically below the posterior part of the lateral
condyle of the femur. The common peroneal nerve can be rolled against it.
Q Lateral femoral condyle the whole of its lateral surface can be felt through the
skin. The most p r o m i n e n t point on its lateral aspect is termed the lateral
epicondyle.
y Lateral malleolus forms a conspicuous projection on the lateral side of the ankle.
It descends to a lower level than the medial malleolus and is placed on a more
posterior plane.
y Medial femoral condyle has a bulging convex medial aspect which can be
palpated without difficulty. The most prominent point on the medial surface of
the condyle is below and a little in front of the adductor tubercle and is termed
the medial epicondyle.
y Medial malleolus, the medial surface of the tibia is continous below with the
visible prominence of medial malleolus.
y Medial surface of tibia is subcutaneous and easily felt.
y Neck of fibula is the constricted upper end of the shaft of fibula immediately
below the head.
y Popliteal fossa, flex the knee against resistance, the fossa is the deep depression
at the back of the knee.
y Tibial condyles form visible and palpable landmarks at the sides of ligamentum
patellae. Lateral condyle is more prominent.
28
Surface Anatomy
Tibial tubercle-
Medial malleolus
landmarksleg
Q Tibial tubercle is subcutaneous in its lower part only, its upper part receives the
attachment of ligamentum patellae.
SURFACE MARKINGS
Joint
Knee (Fig. 2.7)
Line of the knee joint is represented by a line drawn round the limb at the level of
upper margins of the tibial condyles.
Nerves
Common Peroneal Nerve (Fig. 2.9)
Inferior Extremity
29
Neck of fibula
Lateral malleolus-
Medial malleolus
30
Surface Anatomy
Popliteal fossa
Common
peroneal nerve
Tibial nerve
Head of fibula
Medial malleolus
VESSELS
Tendo-calcaneus
Arteries
Anterior Tibial Artery (Fig. 2.10)
Mark a point 2.5 cm below the medial side of the head of the fibula.
Put a mark midway between the two malleoli.
Draw a line joining these points and running downwards and slightly medially.
Draw a horizontal line on the back of the thigh at the junction of the middle and
lower-third of the thigh.
Draw a line to represent the level of the knee joint.
Draw the middle line of the back of the limb between the above two horizontal
lines.
Put a point 2.5 cm medial to the middle line of the back of the limb on the first
horizontal line.
Put a mark on the back at the level of the tibial tubercle.
Join the first point to the meeting place of the second horizontal line with the
midline of the back of the thigh and extend this line to the third point.
Inferior Extremity
Head of fibula
Lateral malleolus
Medial malleolus
Junction of upper
two-thirds and lower
one-third of thigh
Midline
Popliteal artery-
Lateral malleolus
Medial malleolus-
Tendo-calcaneus
32 p| Surface Anatomy
Posterior Tibial Artery (Fig. 2.11)
Put a point in the middle line of the leg at the level of the neck of fibula.
Mark another point m i d w a y between the medial malleolus and the tendocalcaneus. Join these points to get the course of the artery.
FOOT
O Head of the talus, lies 3 cm in front of the lower end of the tibia and can both be
seen and felt when the foot is passively inverted.
^ Medial cuneiform bone, dorsiflex and invert the foot and follow the tendon of
tibialis anterior, which thus becomes prominent, to its insertion into this bone.
Q Peroneal tubercle lies 2 cm below the tip of the lateral malleolus.
t ) Sustentaculum tali can be felt 2 cm vertically below the medial malleolus.
Tubercle on the base of the fifth metatarsal bone can be both seen and felt halfway
along the lateral border of the foot.
Q Tuberosity of the navicular bone is a very conspicuous bony landmark and can
be felt 2.5 cm in front of the sustentaculum tali.
Medial malleolus
Sustentaculum tali
Tubercle of navicular
Medial cuneiform
Lateral malleolus
Head of talus
Peroneal tubercle
Inferior Extremity
33
SURFACE MARKINGS
Joints
Metatarsophalangeal
Nerves a n d Vessels
Dorsalis Pedis Artery (Fig. 2.15)
Put a point midway between the medial malleolus and the prominence of the
heel.
Mark a point 2.5 cm medial to the tubercle of the fifth metatarsal bone.
Put a third point at the proximal end of the first inter-metatarsal space.
Connect these points by a line going forward and laterally and then medially.
Medial Plantar Artery and Nerve (Fig. 2.14)
Put a point midway between the medial malleolus and the prominence of the
heel.
Mark a point in the first interdigital cleft at the level of the navicular bone.
Draw a line joining these points.
Retinacula
Flexor Retinaculum (Fig. 2.14)
Draw a 2.5 cm broad band passing downwards and backwards from the medial
malleolus to the medial aspect of the heel.
34
Surface Anatomy
- Medial malleolus
Flexor retinaculum
-Medial malleolus
-Mid-tarsal joint
-Tarso-metatarsal joint
Inferior Extremity
35
Its lower border runs from the tip of the malleolus to the medial tubercle of the
calcaneum.
Inferior Extensor Retinaculum
(Fig. 2.15)
Draw a band 1.5 cm wide passing medially on the dorsum of the foot
On the medial side of the tendons of the extensor digitorum longus, the band
divides into two diverging limbs, each 1 cm wide. The upper limb passes to the
medial malleolus, the lower passes round the medial aspect of the foot to gain the
plantar aspect.
Superior Extensor
Retinaculum
Draw a 3 cm wide band from the anterior border of the triangular subcutaneous
area of fibula to the lower part of the anterior borders of the tibia.
Thorax
SURFACE LANDMARKS (Figs 3.1 a n d 3.2)
Q Apex beat of heart can be located by first putting the whole palm of the hand in
contact with the chest wall and asking the person to bend a little forwards. When
pulsation is detected its exact position is best determined with the pulp of the
fingers. The apex beat is taken as the lowermost and outermost point at which
the finger is distinctly forced up with each beat of the heart. It lies in health in
the 5th space about 1.25 cm inside the mid-clavicular line or roughly a little
medial to the left nipple.
Q Infra-sternal angle or subcostal angle is formed at the meeting place of the two
subcostal margins.
Suprasternal notch
Left nipple
Fifth rib
Subcostal angle -
Apex beat
Subcostal marginMid-clavicular line
Xiphisternum-
36
Thorax Vv
37
O Nipple is more constant in position in men; it lies in the fourth intercostal space
just lateral to the mid-clavicular line.
Q Ribs are identified by first locating the second rib and then passing downwards
and gradually going further from the sternum. This is desirable to avoid confusion
since the interval between the cartilages of the fifth, sixth and seventh ribs
becomes narrower as they approach the sternum. In practice, it is usually simpler
to count interspaces then ribs. The first rib is difficult to palpate, but the first
interspace can be located just below the clavicle and can be used as a starting
point. Counting of ribs from the 12th rib upwards is unreliable. The 12th rib may
be absent or it may be too short to project lateral to the erector spinae muscte.
Apart from this in 1.2% of the subjects a lumbar "Gorilla" rib may be associated
with the fifth lumbar vertebra.
Q Sternal angle (angle of Louis) is usually palpable and is sometimes visible about
5 cm below the suprasternal notch of the manubrium sterni. It serves as a reference
point in counting the ribs. Each second costal cartilage extends laterally from
the angle.
Q Subcostal margin can be clearly seen and is formed by the costal cartilages of
7th, 8th, 9th and 10th ribs.
Q Suprasternal notch is visible at the upper border of manubrium between the
sternal heads of sternomastoid muscles.
Q Thoracic spine third lies opposite the medial end of the spine of the scapula.
Spines
c7 W
Spine of scapula
t3 w
T7
T U '
Twelfth rib
Iliac crest
38
p | Surface Anatomy
Thoracic spine seventh, lies opposite the inferior angle of scapula when the arm
is in adduction.
Q Thoracic spine twelfth, lies opposite the mid-point of a line drawn from the
inferior angle of scapula to the iliac crest.
Q Xiphisternal joint may be felt as a transverse ridge at the apex of the infra-sternal
angle.
^ Xiphisternum lies in the depression of infra-sternal angle.
SURFACE MARKINGS
Vessels
Arteries
Sterno-clavicular joint
Left common carotid artery
Brachio-cephalic artery
Sternal angle
Ascending aorta
Internal thoracic artery
Median plane
Thorax Vv 39
The aorta can be drawn out as a band 2.5 cm broad which runs downwards and
medially from the first to the second point.
Brachiocephalic
Draw two parallel lines 2.5 cm apart starting and lying partly behind the left
third cartilage and partly behind the sternum and ending at the 2nd left costal
cartilage.
Duct
Thoracic Duct (Fig. 3.4)
40
p|
Surface Anatomy
Pulmonary trunk
Thoracic duct
Median plane
Transpyloric plane
Veins
Left Brachiocephalic
Thorax Vv
41
Mark a point near the sternal end of the lower border of the right first costal
cartilage.
Put a point near the sternal end of the upper border of the right 3rd costal cartilage.
Draw a line 2 cm wide joining these points partly under cover of the right margin
of the sternum.
VISCERA
Heart
Cardiac Orifices (Fig. 3.6)
Pulmonary orifice
Draw a horizontal line 2.5 cm long partly behind the upper border of the left
third costal cartilage and partly behind the sternum.
Aortic orifice
Draw a line 3 cm long downwards and to the right from the medial end of the
left third intercostal space.
Left atrioventricular or mitral orifice
Draw a line 3 cm long passing downwards and to the right lying behind the
left margin of the sternum opposite the left fourth costal cartilage.
Right atrioventricular or tricuspid orifice
Draw a line 4 cm long beginning in the median plane opposite the fourth
costal cartilage and passing downwards and slightly to the right.
ORIFIC
Pulmonary
Aortic
Mitral
42
p|
Surface Anatomy
i. Right border
Put a point 1.2 cm from the margin of sternum on the upper border of the
right 3rd costal cartilage.
Put a point in the right fourth interspace 3.7 cm from the median plane.
Mark the end of the right sixth costal cartilage.
Draw a line joining these points with a gentle convexity to the right.
ii. Lower border
Put a point on the end of the right sixth costal cartilage.
Mark the xiphisternal junction.
Locate the apex beat (see page 36).
Draw a line joining these points.
iii. Left border
Mark the apex beat.
Put a point 1.2 cm from the sternal margin on the lower border of the left
second costal cartilage.
Join these points by a line with an upward convexity.
iv. Upper border
Join the upper ends of the right and left borders.
Left nipple
Apex beat
Lungs
Put a point in the neck 2.5 cm above the medial third of the clavicle.
Draw a convex line upwards through this point
Thorax Vv
43
i. Right lung
Mark the right sterno-clavicular joint.
Put a mark on the midpoint of the sternal angle.
Mark the sixth right chondro-sternal junction.
Join these points to represent the anterior margin of right lung.
ii. Left lung
Mark the left sterno-clavicular joint.
Put a mark on the midpoint of the sternal angle.
Mark the fourth left chondro-sternal junction.
Put another point on the sixth costal cartilage 2.5 cm from the left margin of
the sternum.
Join these points by a line which becomes concave between the last two points to
represent the cardiac notch.
Midaxillary line
Mid-clavicular line
Fourth rib
Fourth rib
Sixth rib
Sixth rib - -
Cardiac notch
\
Oblique fissure
Eighth rib
Eighth rib
Lower border
of lungs
Put a mark on the sixth chondro-sternal junction for right lung and on the 6th
costal cartilage 2.5 cm from the left margin of the sternum for left lung.
Draw the mid-clavicular line and put a mark where it cuts with sixth rib.
Draw the midaxillary line and put a mark where it cuts the eighth rib.
Mark a point 2 cm lateral to the tenth thoracic spine.
Join these points by a line which goes slightly upwards on the back.
44 p|
Surface Anatomy
Midclavicular line
Midaxillary line
border of lung
-Costo-diaphragmatic line
lii
of pleural reflection
Thorax 11
45
Costo-vertebral line of
pleural reflection
Lung root
Oblique fissure
Fig. 3.10: Lower and posterior borders of lung and respective pleural reflections
Put a point in the median plane at the level of 4th costal cartilage.
Draw the midaxillary line.
Join the first point to the mid-axillary line by a transverse line along the right
fourth costal cartilage.
Roots of Lungs (Fig. 3.10)
Left Costo-mediastinal
46
Midclavicular line
4th costal cartilage
Put another point in the midline at the level of left fourth costal cartilage.
Mark the xiphisternal joint.
Draw a line to joint the first three points then carry it to the left to reach the
sternal margin and follow that margin to reach the left extremity of xiphisternal
joint.
Costo-diaphragmatic
Reflection
Thorax
47
- Sternal angle
Oesophagus
Thyroid cartilage
Cricoid cartilage
Trachea
Sternal angle
Third left costal cartilage
Right third
costal
cartilage
Median plane
48
p | Surface Anatomy
Parts)
Mark a point a little to the right of the centre of the sternal angle.
Put a point on the left third costal cartilage 3.5 cm from the median plane.
Draw a line 5 cm long joining these points.
Abdomen
and Pelvis
SURFACE LANDMARKS (Figs 4.1 a n d 4.2)
0 Anterior superior iliac spine lies at the lateral end of the fold of the groin.
Highest point of the iliac crest lies opposite the interval between the spines of
L3 and L4.
0 Iliac crest can be palpated throughout its whole length at the lower part of the
back.
Q Linea alba is a linear depression in the median plane.
y Linea semilunaris is a curved groove crossing the costal margin at or near the tip
of the ninth costal cartilage and terminating below at the pubic tubercle. It
corresponds to the outer border of the rectus abdominis muscle.
y McBurney's point (Fig. 4.3) is situated at the junction of the outer and middlethird of a line drawn from the right anterior superior iliac spine to the umbilicus.
This point corresponds to the usual seat of maximum pain on palpation in an
attack of appendicitis. The surface marking of the caecal orifice of the appendix
does not coincide with this point.
Linea alba
Linea sermilunaris
Umbilicus
Anterior superit
iliac spin
Pubic crest
Pubic tu
Pubic symphys.
49
50 p| Surface Anatomy
Iliac crest
Posterior superioriliac spine
Highest point of
iliac crest
-Tubercle of
iliac crest
Q Posterior superior iliac spines lie under two symmetrically placed dimples by
the side of the commencement of the natal cleft.
Q Pubic crest is the free rounded upper border of the body of the pubis and can be
felt lateral to the pubic symphysis.
Q Pubic symphysis can be felt indistinctly at the lower end of median line.
^ Pubic tubercle is a rounded projection at the lateral extremity of the pubic crest.
It is obscured by the spermatic cord which crosses its upper aspect.
Q Second sacral spine lies on the middle of the line joining the posterior superior
iliac spines.
4) Tubercle of iliac crest lies 5 cm or more behind the anterior superior iliac spine
on a level with the upper border of L5 (the transtubercular plane).
Q Umbilicus usually lies 2.5 cm to 3.5 cm above the transtubercular plane, and
corresponds to the level of the disc between L3 and L4. It is, however, very
inconstant in position.
PLANES (Fig. 4.3)
For covenience of description of the viscera the abdomen is divided by certain sagittal
and horizontal planes which are drawn as follows.
Sagittal Planes
i. Median vertical plane extends in the midline from the symphysis pubis to the
middle point at supra-sternal notch.
ii.
planes e x t e n d v e r t i c a l l y u p f r o m m i d w a y b e -
tween the anterior superior iliac spine and the pubic symphysis to a point on
the clavicle midway between the midpoint of supra-sternal notch and acromioclavicular joint.
51
Median plane
Lateral vertical plane
Transpyloric plane
Subcostal plane
Transtubercular plane
McBurney's
point
Transverse Planes
Portal vein
Inferior margin
of liver
Hilum of left kidney
Transpyloric plane
Anterior end of spleen
Neck of gall bladder
Hilum of right kidney
-Superior mesenteric
artery
Pylorus
52
Surface Anatomy
Mark the internal abdominal ring 1.25 cm above the mid-point of the inguinal
ligament.
Put a point immediately above the pubic tubercle to mark the external ring.
Join these points by two parallel lines 3.75 cm long to indicate the canal.
Arteries
Abdominal
53
It can be represented by a small circle on the median plane 2.5 cm above the
transpyloric plane.
Put a point 1.2 cm below the umbilicus and the same distance from the median
plane (bifurcation of aorta).
Mark the mid-point between the anterior superior iliac spine and the pubic
tubercle.
Draw a broad line joining these points and presenting a slight convexity to the
lateral side.
- Upper one-third will represent common iliac artery.
- Lower two-thirds will represent external iliac artery
Hepatic Artery (Fig. 4.6)
Place a point on the median plane 2.5 cm above the transpyloric plane.
Mark a point 2.5 cm below and to the right of the first point.
Put a point 3 cm vertically above the second point.
Join these points by a line to get the marking of the artery.
Splenic artery
Median plane-
Transpyloric plane
Left renal artery
Transtubercular,
plane
54
Surface Anatomy
Inferior Epigastric
Put a point midway between the anterior superior iliac spine and the pubic
symphysis.
Mask a point 1.25 to 2.5 cm outside the umbilicus.
Join these two points to indicate the course of this artery which forms the outer
boundary of inguinal triangle of Hesselbach.
Inferior Mesenteric
Put a point 2.5 cm above the umbilicus and 1.2 cm to the left of the median
plane.
Mark another point 4 cm below the umbilicus.
Join these points by a line which runs downwards and slightly to the left from
the first to the second point.
Left Gastric Artery (Fig. 4.6)
Put a point on the median plane 2.5 cm above the transpyloric plane.
Place a point 2.5 cm to the left of the median plane on seventh costal cartilage to
represent the cardiac orifice of the stomach.
Join these points by a line going upwards and to the left.
Renal Arteries
(Fig. 4.6)
i. Right
Put a point in the median plane 1.5 cm below the transpyloric plane.
Place another point 4 cm lateral to first point and below the transpyloric
plane.
Draw a broad line parallel to the transpyloric plane and joining the above
two points.
ii. Left
Put the first point as for the right artery.
Mark the second point 4 cm lateral to the first but above the transpyloric
plane.
Join these points by a broad line which will cross the transpyloric plane.
Splenic Artery (Fig. 4.6)
Mark a point on the median plane 2.5 cm above the transpyloric plane.
Draw a wavy line 10 cm long going to the left and slightly upwards.
Superior
Mesenteric
55
Veins
Common and External Iliac Veins (Fig. 4.7)
Put a point just below the trans-tubercular plane 2.5 cm to the right of the median
plane indicating the commencement of the inferior vena cava.
Mark a point 1 cm medial to the mid-point of the line joining the pubic symphysis
to the anterior superior iliac spine.
Join the two points by a line slightly convex to the lateral side. Upper one-third
will represent the common iliac and lower two-thirds the external iliac vein.
Inferior Vena Cava (Fig. 4.7)
Right sixth
costal cartilage
Median plane
Portal vein
Transtubercular plane
Transpyloric plane
Common iliac vein
External iliac vein
0
Figs 4.7 a n d 4.8:
Veins of abdomen
56
Surface Anatomy
Digestive System
Stomach
(Fig. 4.9)
i. Cardiac orifice
Draw the median plane.
Put a mark 2.5 cm to the left of the median plane on the seventh costal
cartilage.
Draw two short parallel lines 2 cm apart inclining downwards and to the left
from the above point.
ii.
Pylorus
Draw the transpyloric plane.
Put a point on the above plane, 1.2 cm to the right of the median plane.
Draw two short parallel lines 2 cm apart, directed upwards and to the right.
Median plane
Transpyloric plane
Subcostal plane
57
Small Intestine
Duodenum
(Fig. 4.10)
i. First part
Draw the transpyloric plane.
Mark the pylorus of stomach by two short parallel lines 2 cm apart on the
transpyloric plane 1.2 cm to the right of the median plane.
Mark a point 2.5 cm above and to the right of the pylorus.
Join the last two points.
ii. Second part
Draw the right lateral plane.
Put a point 7.5 cm below the transpyloric plane and medial to the right
lateral plane.
Draw the second part 2.5 cm wide from the end of the first part to the point
described above.
iii. Third part
Draw the subcostal plane.
Draw the third part transversely from the end of the second part at the level of
the subcostal plane and ending just to the left of median plane.
iv. Fourth part
Put a point 2.5 cm to the left of the median plane and 1 cm below the
transpyloric plane to indicate the duodeno-jejunal flexure.
Join the end of the third part with this point to indicate the last part of the
duodenum.
Ileocolic orifice
Transtubercular plane
58
Surface Anatomy
Jejunum a n d Ileum
Attachment
of the Mesentery
of Small Intestine
(Fig. 4.10)
Lies opposite the point of intersection of the transtubercular and the right lateral
planes.
i. Caecum
Draw the right lateral plane.
Draw the trans-tubercular plane.
Mark the figure of caecum 6 cm long in the triangular area bounded by the above
two planes and the fold of the groin.
Opening of vermiform appendix
Lies 2 cm below the junction between the right lateral and the transtubercular
planes.
ii. Ascending colon
Draw the transpyloric, subcostal, transtubercular and right lateral planes.
Hepatic flexure
Rib IX
Ascending colon
Transverse colon
Subcostal plane
Descending colon
Transtubercular plane
Caecum
Appendix
Pelvic mesocolon
Fold of groin
59
Draw two lines 5 cm apart lying to the right of the right lateral plane starting on
the transtubercular plane and ending midway between subcostal and transpyloric
planes, corresponding to the upper part of ninth right costal cartilage, here the gut
turns on itself to form the hepatic flexure.
iii. Transverse colon
Mark a point midway between transpyloric and subcostal planes and to the
right of the right lateral plane at the level of ninth costal cartilage to indicate
the upper end of ascending colon.
Put another point above the transpyloric plane to the left of the left lateral
plane at the level of the left eighth costal cartilage.
Draw two lines 5 cm apart starting at the first point and descending downwards
and medially to the umbilicus and then ascending upwards and laterally to the
second point. At the second point it forms the splenic flexure.
iv. Descending colon
Put a point above the transpyloric plane to the left of left lateral plane at the
level of the left eighth costal cartilage.
Mark another point on the fold of the groin.
Draw two lines 2 cm apart starting at the first point and ending at the second and
lying wholly to the left of the lateral plane.
Attachment
of Pelvic Mesocolon
(Fig. 4.11)
Put a point in the sixth intercostal space 2.5 cm from the median plane.
Draw the subcostal plane and mark a point on it 1.75 cm from the median plane.
Join these points by a line 7.5 cm 'long which should run first downwards and
inwards to the costal margin, then run parallel to the midline for 4 cm and then
downwards and laterally for 2 cm to the point on the subcostal plane.
Gallbladder
(Fig. 4.12)
The f u n d u s can be marked in the angle between the right costal margin and
linea semilunaris.
60
Surface Anatomy
Sixth
intercostal
space
Median plane
Common bile duct
Fundus of
gall bladder
-Transpyloric plane
Linea
semilunaris
Subcostal plane
i. Upper border
Mark the xiphisternal joint.
Put a point a little below the right nipple.
Mark a point a little below and medial to the left nipple.
Draw a line through the xiphisternal joint ascending to the right point and
ascending less sharply to the left point.
ii. Right Border
Put a point 1 cm just below the tip of the right tenth costal cartilage. Draw a
convex line from below the right nipple to the above point.
Xiphisternal joint
Nipple
Right ninth
costal
catilage
Transpyloric plane
Fundus of
gallbladder
Subcostal plane
Median plane
Right tenth
costal catilage
61
(Fig. 4.10)
Neck
Passes upwards and to the left and is the junction of the head and the body.
iii.
Body
Body can be represented by two parallel lines 10 cm long and 3 cm apart
going to the left from the neck.
iv. Tail
Tail extends to the left as far as the hilum of spleen.
Urogenital System
Kidneys (Anterior Surface Markings)
(Fig. 4.14)
62
Surface Anatomy
Median plane
Right suprarenal g l a n d -
Right kidney -
Left kidney
Transpyloric plane
Pelvis of u r e t e r -
Right u r e t e r -
Ureters (Anterior
Surface Marking)
(Fig. 4 . 1 4 )
Mark the hilum of the kidney 5 cm away from the median plane. That of the
right kidney a little below and of the left kidney a little above the transpyloric
plane.
Put a point 5 cm below the transpyloric plane and same distance from the median
plane.
Mark a point at the junction of the upper and middle-third of a line drawn from
a point 1.25 cm below and to the left of the umbilicus to a second point situated
half way between the anterior superior iliac spine and the symphysis pubis.
Morris' parallelogram
Right kidney
Right ureter
Posterior superior
iliac spine
63
Kidneys (Posterior
Surface Marking)
(Fig. 4.15)
Surface Marking)
(Fig. 4.15)
Mark a point 4 cm from the median plane at the level of lower border LI.
Locate the dimple which overlies the posterior superior iliac spine.
Join these to get the surface marking of the ureter on the back.
Ductless Glands
Spleen (Fig. 4.16)
Right ninth r i b -
Mid-axillary line
64
Surface Anatomy
Suprarenals
(Fig. 4 . 1 4 )
Left gland
Draw the left kidney
Draw a semilunar figure 4.5 cm long and 2 cm wide closely applied to the medial
border of the left kidney above the hilum.
Right gland
Draw the right kidney.
Draw a triangle measuring 3 cm long and 3 cm wide placed at the upper pole of
the right kidney.
Q
O
0
y
^
Q
&
Asterion is placed about 2 cm behind and 1.25 cm above the superior part of the
posterior border of the mastoid process.
Bregma can be marked at the centre of the line drawn across the vertex from one
external auditary meatus to the other, the head being in the usual erect position.
Condyloid process can be felt to pass downwards and forwards immediately in
front of the lower part of the tragus when the mouth is opened.
External occipital protuberance can be felt at the upper end of the nuchal furrow
on the back of neck.
Fronto-zygomatic suture can be recognised as a slight irregular depression on
the lateral orbital margin.
Gonion or the angle of mandible can be seen and palpated below and in front of
the lobule of the ear. It is the outer margin of the angle of mandible.
Inion is the highest point on the external occipital protuberance
Lambda corresponds to an irregular depression above and in front of the
maximum occipital point which is a backward convexity above the external
occipital protuberance. It is situated about 7 cm above the external occipital
protuberance.
Mastoid process is hidden by the lobule of the ear. Its anterior border and lateral
aspect can be felt easily. The insertions of sternomastoid and splenius capitis
obscure its posterior border and the tip.
Mental protuberance, the projection is easily identifiable at the chin.
Nasion is a well marked depression at the root of the nose and overlies the junction
of frontonasal and internasal sutures.
Pre-auricular point is situated immediately in front of the upper part of the tragus
of the ear and the pulsation of superficial temporal artery can be felt there.
65
66
Surface Anatomy
Bregma
Pterion
-Fronto-zygomatic
suture
Lambda
Nasion
Asterion
Inion
Fig.
Lambda
Asterion
External occipital
protuberance
Nuchal furrow
C7 spine
O Pterion is neither a visible nor a palpable surface landmark. Its centre can be
located approximately 3.5 cm behind and 1.5 cm above the fronto-zygomatic
suture. It can also be located by placing the thumb behind the frontal process of
the zygomatic bone and two fingers above the zygomatic arch. The angle thus
formed lies on pterion (Stiles).
Q Reid's base line passes through a point on the lowest level of the infra-orbital
margin and another point on the upper border of the external auditary meatus.
The cerebrum lies entirely above the level of this line while the cerebellum occupies
the area immediately below the posterior third of this line and can be given no
definite surface marking.
67
Q Supra-orbital notch is present at the junction of rounded medial third and sharper
lateral two-thirds of supra-orbital margin.
-Supra-orbital notch
-Glabella
-Nasion
-Preauricular point
-Pterion
~Fronto-zygomatic
suture
68
Surface Anatomy
SURFACE MARKINGS
Glands
Parotid Duct (Fig. 5.5)
Pituitary fossa
Nasion
Inion
Parotid duct
Concha
of ear
Masseter muscle
Parotid g l a n d
Hyoid b o n e -
Position of tonsil
Submandibular
gland
69
Lies on the straight line joining the nasion with the inion at a depth of 6-7 cm
from the nasion.
Submandibular
Tonsil is drawn by an oval outline situated over the masseter muscle just above
and in front of the angle of mandible.
Nerves
Facial Nerve (Fig. 5.6)
Put a point on the middle of the anterior border of the mastoid process.
Draw a horizontal line across the upper part of the lobule of the ear.
The general transparotid course of the nerve and the direction of its buccal branch
may be indicated by a line drawn forwards parallel to and below Parotid duct
from the lobule of the ear (see page 68).
70
Surface Anatomy
Jugal point
Maxillary and
infra-orbital nerves
Trigeminal
ganglion
Facial nerve
Lingual nerve
Masseter
muscle
Mark the jugal point which is the angle between the temporal border of the
zygomatic bone and upper border of the zygomatic arch.
Mark the infra-orbi tal foramen by a point vertically below the supra-orbital notch
and 1 cm below the infra-orbital margin.
Join these two points to represent the course of the maxillary nerve and its infraorbital branch.
Trigeminal
Ganglion
(Fig. 5.6)
VESSELS
Arteries
Facial Artery (Fig. 5.6)
71
Anterior division of
middle meningeal artery
Frontal branch of middle
meningeal artery
Lambda
Pterion
Facial artery
Posterior division of
middle meningeal artery
72
Surface Anatomy
Veins a n d Sinuses
Anterior Facial Vein (Fig. 5.8)
It is drawn just behind the location of the facial artery by taking similar points.
Cavernous
Sinus
It is on the medial side of the trigeminal ganglion (page 70) but extends to a
more anterior position.
Put a point on the base of the mastoid process on the posterior aspect of the root
of the external ear.
Mark another point 1.2 cm above the mastoid tip.
Draw two lines 1.3 cm apart starting from the first point and going downwards
along the line of reflection of the skin from the pinna to the head posteriorly and
coming to the level of the lower margin of the meatus and then going forwards to
the margin of the meatus which is opposite the jugular foramen.
Superior Sagittal Sinus (Fig. 5.8)
Attc
Glabella
Outline
Transveri
Inion
External auditory
meatus
Facial vein
AsterionSigmc
Mastoid
NECK
By running a finger from the symphysis menti downwards the following can easily
be felt in the order given below.
& Seventh cervical spine. Can be palpated on the back of neck at the lower end of
the nuchal furrow and is the first spine to be felt when the finger is run from
above downwards (Fig. 5.2).
Q Sternomastoid muscle. When the head is rotated to one side and tilted forwards,
the muscle of the opposite side stands out and forms a visible landmark. The
anterior border is seen extending from the sternum to the anterior border of
mastoid process. The posterior border ascends from the junction of the medial
and middle thirds of the clavicle to the mid-point between the mastoid process
and inion.
Tip of the transverse process of atlas lies midway between the tip of the mastoid
process and the angle of mandible.
74
Surface Anatomy
Position of
transverse process of atlas
Sternomast
Hyoid bone
Trapez
Position of can
tubei
Thyroid cartilage
Position of first
Cricoid cartilage
First tracheal ring
Isthmus of thyroid gland
Clavicular part of
sternomastoid
f V "
'
Supra-sternal notch
Q Trapezius. Its anterior border can be seen when resistance is opposed to the
elevation of the shoulder.
SURFACE MARKINGS
Gland
Thyroid Gland (Fig. 5.10)
i. Isthmus
Draw a line 1.5 cm long across the trachea, 1 cm below the arch of the cricoid
cartilage to represent the upper border of isthmus.
Draw another line 2 cm lower d o w n to indicate the lower border of isthmus.
ii. Lateral lobes
Put a point 1 cm below the lateral end of the lower border of isthmus.
Mark another point 2.5 cm below and lateral to the outer end of the lower
border of isthmus.
Put a point a little in front of the anterior border of sternomastoid at the
level of laryngeal prominence to represent the extent of upper pole.
Lines joining the upper pole to the lateral end of the upper border of isthmus and
to the lateral end of the lower pole complete the outline of the lateral lobe of the
gland.
,.
75
Hyoid bone -
Arch of cricoid
- First tracheal ring
- Isthmus of thyroid gland
Suprasternal notch
_ateral lobe of thyroid gland
Anterior
(Fig. 5.13)
i. Lateral border
Put a point 2.5 cm from the median plane at the level of upper border of the
thyroid cartilage.
Mark the junction of the medial and middle-third of the lower border of the
clavicle.
Join these points by a line running downwards and laterally.
ii. Medial border
Place a point 2.5 cm from the median plane at the level of the arch of the
cricoid cartilage.
Put a point 1 cm medial to the lower end of the lateral border.
Join these points by a line running downwards and laterally.
Nerves
Brachial Plexus (Fig. 5.11)
The upper limit is represented by a line drawn by joining the following points.
The midpoint between the anterior and posterior borders of sternomastoid at
the level of the cricoid cartilage.
A point just external to the mid-point of the clavical.
Cervical
Plexus
76
, Surface Anatomy
Great Auricular
Nerve (Fig. 5 . 1 1 )
Put a point a little above the mid-pont of the posterior border of sternomastoid.
Draw a line from this point running upwards towards the lobule of the ear.
Lesser Occipital
Nerve (Fig. 5 . 1 1 )
Put a point a little above the mid-point of the posterior border of sternomastoid.
Draw a line from this point ascending along the posterior border of the muscle
to reach the scalp.
Put a point 3.5 cm from the median plane on a level with the upper border of
thyroid cartilage.
Put a point midway between the anterior and posterior borders of sternomastoid
at the level of cricoid cartilage.
Mark the sternal end of calvicle.
Join these points to get the surface marking of the phrenic nerve.
Supra-clavicular
Put a point a little below the mid-point of the posterior border of sternomastoid.
Draw three lines descending towards the medial, intermediate and lateral-third
of the clavicle.
Lesser
Great auricular nerve
Anterior cutaneous nerve
Supra-C
Laryngeal prominence
Cricoid cartilage
Upper limit of brachial
plexus
,.
77
Cranial Nerves
Accessory
Put a point on the lower and anterior part of the tragus of ear.
Mark a point just above the angle of mandible.
Join these points by a line which should continue along the lower border of
mandible for a short while.
Hypoglossal
Tragus of ear
Position of transverse
process of atlas
Glossopharyngeal nerve
Outline of lower border of mandible
Accessory nerve
Hypoglossal nerve
Vagus nerve
Phrenic nerve
78
, Surface Anatomy
Put a point midway between the angle and symphysis of mandible with the
head tilted backwards.
Join these points by a line which should bend sharply forwards and curve upwards
between the second and third points.
Vagus Nerve (Fig. 5.12)
Position of transverse
process of atlas
Condyle of mandible
Middle cervical ganglion
Superior cervical
ganglion
Phrenic nerve
Scalenus anterior
muscle
Thyroid cartilage
Cricoid cartilage
Sympathetic trunk
Inferior cervical
ganglion
,.
79
VESSELS
Arteries
Common
Put a point on the anterior border of sterno-mastoid at the level of the upper
border of thyroid cartilage.
mandible.
Mark a point midway between the tip of the mastoid process and the angle of
Join these points by double lines gently convex forwards in the lower half and
gently convex backwards in the upper half.
Internal Carotid Artery (Fig. 5.14)
Mark a point on the anterior border of sterno-mastoid at the level of the upper
bodcr of thyroid cartilage.
Put a point at the posterior border of the condyle of mandible.
Join these points by double lines.
Subclavian
The following points should be marked with the shoulder well depressed.
Comr
Subclav
80
Surface Anatomy
Subclavian vein N
Brain
SURFACE LANDMARKS
These have been described with Head and Neck (see Chapter 5).
SURFACE MARKINGS
Crebral Borders (Fig. 6.1)
Superciliary
Border
Supermedial
Border
Pole
Border
Put a point on the middle of the upper border of the zygomatic arch.
Mark another point just above and lateral to the inion.
Draw a line backwards from the first point to cross the auricle a little above the
external auditory meatus and then to descend slightly to the second point.
81
82
Surface Anatomy
Bregma
Central sulcus
Postcentral sulcus
Precentral sulcus
Sylvian point
Pterion
Parietal eminence
Superior temporalsulcus
Parieto-occipital
ipi
sulcus
ilc
riM
Superciliary border
Nasion
Temporal pole
Inion
Infero-lateral border
CEREBRAL SULCI
Central Sulcus of Rolando (Fig. 6.1)
Put a point 1.2 cm (a finger's breadth) behind the mid-point of the line joining
the nasion to the inion in the median plane or a little less than 5 cm posterior
to bregma.
Mark a point 5 cm. vertically above the pre-auricular point (a thumb breadth
behind the pterion).
Draw a line from the first point running d o w n w a r d s and laterally for about
8.75 cm with somewhat sinuous course and making an angle of 70 with the median
plane as it joins the second point.
Precentral a n d Postcentral Sulci (Fig. 6.1)
These are drawn parallel to the central sulcus 1.25 cm (a finger's breadth) in
front and behind it respectively.
i. Posterior ramus
Put a point 4.5 cm above the middle point on zygomatic arch (Sylvian point)
Mark another point a finger's breadth above the top of the auricle.
Locate the parietal eminence and place a third point 1.2 cm below it.
Draw a line from the first point going backwards with an upward inclination to
the second point. Curve the line sharply upwards to end at the parietal eminence.
Brain
83
Draw a line 1 cm below the posterior ramus of the lateral sulcus exhibiting a similar
curve.
Parieto-occipital Sulcus (Fig. 6.1)
It is on the left side in right handed persons and on the right side in left handed ones
and is situated between the two anterior rami of the lateral sulcus, immediately
above and anterior to the Sylvian point, which is 4.5 cm above the middle point on
the zygomatic arch.
It can also be roughly located by a finger tip placed immediately above the pterion
on the left side (in the right handed people). Pterion can be located by the Stiles
method as already described in page 67).
Motor a r e a -
Central sulcus
Sensory area
Sylvian point-
Posterior ramus
of lateral sulcus
Motor speechcentre
Auditory area
Visual area
External occipital
protuberance
84
Surface Anatomy
A strip, the breadth of a finger, laid in front of the line for the central sulcus would
indicate its position.
Sensory Area (Fig. 6.2)
A strip, the breadth of a finger, placed immediately behind the line for the central
sulcus would indicate its position.
Auditory Area (Fig. 6.2)
It is situated below the posterior part of the posterior ramus of lateral sulcus and
lies roughly above the upper margin of the auricle.
Two finger tips placed side by side on the head a little above and in front of the
top of the auricle are opposite the centre.
Visual Area (Fig. 6.2)
Radiological Anatomy
SUPERIOR EXTREMITY
INFERIOR EXTREMITY
BONE AGE
THORAX
ABDOMEN AND PELVIS
HEAD AND NECK
VERTEBRAL COLUMN
ANGIOGRAPHY
NEW I M A G I N G DEVICES
NOTES
Introduction
INTRODUCTION (Fig. 1)
10"
10"
102 10
10'2 10-
- Cosmic rays
Gamma rays
X-rays
- Ultraviolet
- Visible
Infrared
Radiowaves
Electrical waves
WauAR-lfinrith in ran
88
Radiological Anatomy
Properties of X-rays
Skiagrams are taken in different positions of the subject in relation to the source of
X-ray! and the photographic film. Some of the common positions used are:
1. Antero-posterior view (AP)
It is taken with the X-ray tube anterior to the subject and the film posteriorly placed.
Posterior structures are better visualised in this view.
2. Postero-anterior view (PA)
In this the X-ray tube is posterior to the subject and the film anterior, the rays thus
passing postero-anteriorly through the subject. Anteriorly placed structures are more
clearly visible in this view. The more commonly taken X-ray of the chest is a P.A.
view.
Introduction
89
3. Lateral views
These are used to assess the depth of the structures and can be:
i. Right lateral view: when the film is in contact with the right side of the subject,
ii. Left lateral view: when the film is kept against the left side of the subject.
4. Oblique views
These are used for special study of a particular structure. In the case of chest X-rays
these could be:
i.
ii.
The subject stands in front of upright film casette holder and is then turned 45
oblique (left or right).
The orientation of a radiograph is marked by incorporating a lead letter into the
cassette before exposing a film, e.g. the right side with an 'R', and left side with
an 'L.
TYPES OF RADIOGRAPHS
1. Plain Radiographs
When X-rays are allowed to pass through the subject without the use of any medium
the translucent portions appear black on the developed X-ray plate, whereas the
dense areas absorb the X-rays in varying degrees resulting in different shades of
white.
2. Contrast Radiographs
When X-rays are taken after filling a cavity or space with a contrast medium in
order to visualise the lumen of the viscus or extent of the cavity.
The contrast media are of two types:
a. Opaque, e.g. b a r i u m sulphate for the gastro-intestinal tract, and iodine
compounds for the urinary tract.
b. Translucent, e.g. air or oxygen for ventricles of brain.
X-RAY APPEARANCES OF NORMAL SKELETON (Fig. 2)
Structure of Mature Bone
Because of their high calcium content, the bones of the skeleton are clearly defined
and contrasted with the soft parts. The long bones show a dense white homogenous
outer layer, the cortex, which encloses a less dense inner portion, the cancellous
bone, which is repre-sented by a series of fine white lines that correspond to the
thin sheets of bone known as the trabeculae or lamellae. These lamellae are arranged
mainly in the direction of the predominant stress, but are joined to each other by
cross bracing lamellae. Lamellae placed on the lines of pressure are seen particularly
clearly, in the neck of the femur (calcar-femorale) and in the calcaneum, because
90
Radiological Anatomy
Calcar femorale
Cancellous bone
lamellae
Cortex
they are subjected to great stress. In the long bones of the limbs generaly they tend
to run vertically, but the number of cross bracing obscures the pattern. Study of the
trabecular architecture and the distribution of the cortical and cancellous layers in
each bone is useful because alterations occur in many pathological conditons.
In the shafts of the long bones the cancellous bone is absent and is replaced by a
space, the medullary (marrow) cavity, which can be seen in a skiagram though its
limits are not clearly demarcated.
Structure of Immature bone
Superior
Extremity
SHOULDER REGION
RADIOGRAPHIC APPEARANCE
Antero-posterior View (Fig. 7.1)
When an antero-posterior view is taken with the arm by the side the following
details are noticed.
Q Acromioclavicular joint as a gap between the clavicle and the acromion.
U Acromion lying partly behind the head of humerus and superimposed on it.
Q Anatomical neck of humerus: Medial portion is on a level with the junction of
the middle and lower thirds of the glenoid cavity. It appears as an angular notch.
O Clavicle. Lateral half of the clavicle projects a little higher than the adjacent upper
surface of the acromion.
O Conoid tubercle as a bony prominence on the inferior surface of the clavicle
near the outer third.
O Coracoid process as a more or less circular shadow below the lateral third of the
clavicle.
Q Glenoid cavity as a narrow ellipse.
Si Greater tuberosity of humerus as the most lateral bony point in the shoulder
region.
O Head of the humerus lying against the glenoid cavity.
O Inferior angle of scapula is seen partly superimposed on the lung field, at the
level of the seventh rib or seventh intercostal space.
O Lesser tuberosity and bicipital groove are difficult to identify.
Q Superior angle of scapula projects upwards in the angle between the clavicle
and the first rib.
91
106'Radiological Anatomy
Conoid tubercle
Clavicle
Acromio-clavicular joint
of scapula
Acromion
Coracoid
Greater tuberosity
Head of humerus
Glenoid cavity
Anatomical neck
Inferior angle
of scapula
Fig. 7.1: S h o u l d e r A P v i e w
Introduction
93
ELBOW
RADIOGRAPHIC APPEARANCE
Antero-Posterior View (Fig. 7.2)
Olecranon and
coronoid fossae
Olecranon process
ateral epicondyle-
Medial epicondyle
Trochlea
Elbow joint space
Head and tuberosity
of radius
94
'
Radiological Anatomy
Supracondylar ridge
Epicondyle
Capitulum
Head of radius
Olecranon process
Coronoid process
Introduction
95
WRIST A N D HAND
RADIOGRAPHIC APPEARANCE
Postero-Anterior View (Fig. 7.4)
Q Carpal bones can be easily recognised. From lateral to medial side. They are:
i. Proximal row scaphoid, lunate, triquetral and pisiform.
Pisiform shadow is superimposed on that of the triquetral.
ii. Distal row trapezium, trapezoid, capitate and hamate.
Hook of hamate appears as on oval white ring.
Trapezium and trapezoid slightly overlap each other.
Sesamoid bone
Sesamoid
bone
Hook of hamate
Radio-carpal and
intercarpal joint
spaces
Pisiform
Styloid i
of ulna
First metacarpal
96
'
Radiological Anatomy
Metacarpals
First lies somewhat laterally on the trapezium. It is seen obliquely and slightly
distorted. Second, third, fourth and fifth outline of each is easily defined. The bases
tend to overlap.
Q Phalanges are seen separated by interphalangeal joints. The terminal phalanges
give a spade like appearance.
O Radio-carpal and inter-carpal joint spaces are clearly seen.
Q Radio-ulnar joint space is mostly obscured by overlapping bones.
O Sesamoid bones: In the hand the following sesamoid bones are of almost constant
occurrence.
i. Two opposite the head of the first metacarpal in the tendon of flexor pollicis
brevis muscle.
ii. One sesamoid bone is also sometimes seen opposite the head of the fifth
metacarpal.
iii. One or two sesamoid bones are frequently present opposite the interphalangeal joint of the thumb, they lie in the flexor tendons.
O Styloid process of radius and ulna: The styloid process of radius extends further
distally than that of ulna.
Inferior Extremity
H
RADIOGRAPHIC APPEARANCE
Antero-posterior View (Fig. 8.1)
The patient is placed flat on his back with the toe of his foot pointing somewhat to
the median plane. This later measure is of importance so that the neck of the femur
is not foreshortened.
(d Acetabulum: The superior and medial edge appears as a curved white line of
cortical bone. The posterior rim is seen partly superimposed on the head of the
femur.
Greater trochanter: In anatomical position of the foot, it lies in a plane somewhat
posterior to the head of the femur. In external rotation its shadow overlaps that
of the head. The contour of the greater trochanter tends to be poorly defined in a
usual X-ray of hip region.
O Head of femur: The cortex of the head of femur casts a white line. Fovea capitis
femoris is visible as a small depression on the head.
(I Hip joint space appears as a radiolucent interval between the white lines of the
rim of acetabulum and the head of the femur,
y Lesser trochanter: Its situation is of interest because the extent to which it is
visible affords a rough guide to the position of the limb at the time of exposure.
It appears as a more prominent projection when the femur is laterally rotated
than when it is medially rotated.
H Neck of femur: The neck of the femur as seen in Fig. 8.1 normally makes an
angle of 25-30 to the coronal plane. The femoral head projects medially and
markedly forwards.
The neck of the femur has a relatively constant angle with the shaft which is
usually between 120 and 140 degrees, being more in children and less in females,
who have a wider pelvis.
97
98
'
Radiological Anatomy
S e c o n d line
Shenton's
line
Acetabulum
Greater trochanter
Femoral head
Lesser trochanter
Inferior Extremity
99
The pressure lamellae in the femoral neck (calcar femorale) have a distinctive
pattern (Fig. 8.2).
The periphery of the normal femoral neck and the pelvic bone produce two regular
curvatures, the appreciation of which are of considerable value in recognising
displacements.
(i) Shenton's line: The line of the upper margin of the obturator foramen follows
the same curve as that of the under surface of the neck and medial side of the
shaft of the femur (lower line on X-ray plate).
(ii) The second line: It is indicated as forming the lateral border of the ilium from
the anterior-superior iliac spine across the hip joint and continued on to the
superior border of the femoral neck and to the greater trochanter (upper line
on X-ray plate).
RADIOGRAPHIC APPEARANCE
Antero-posterior View (Fig. 8.2)
Patella
Intercondylar
notch of femur
ends of
femur and tibia
Intercondylar
eminence of tibia
100
'
Radiological Anatomy
The knee is partially flexed, and its lateral aspect placed next to film.
y Intercondylar eminence of tibia is slightly overlapped by the femoral condyles.
The spine lies somewhat behind the midpoint of the superior surface of tibial
condyles.
O Knee joint space is obscured by the overlappping bone shadows.
y Medial and lateral femoral condyles: The anterior and posterior margins of two
condyles are not superimposed due to the difference in their diameters.
y Patella is seen in front of the condyles of femur.
Patella
Head of fibula
Knee
joint
space
Inferior Extremity
101
ANKLE
RADIOGRAPHIC APPEARANCE
Antero-posterior View (Fig. 8.4)
y Lower end of fibula is superimposed on the tibia. The joint space between it and
the talus is not visible in this view,
y Lower end of tibia is seen separated from the upper surface of talus by the ankle
joint space which is continued on the medial side of talus and separates the
same from the medial malleolus,
y Talus casts a four-sided shadow below the lower ends of tibia and fibula.
Lower
end of tibia
Ankle joint
space
Lower end of fibulai
Talus
102
Radiological Anatomy
| J
FOOT
RADIOGRAPHIC APPEARANCE
Antero-posterior View (Fig. 8.5)
In this position the sole is on the film.
The outline of various tarsal and metatarsal bones and phalanges can be clearly
made out.
y Calcaneum: Its anterior part can be easily made out.
O Cuboid bone articulates directly with calcaneum on its proximal surface,
y Cuneiform bones medial, intermediate and lateral can be seen articulating with
the navicular proximally. The lateral cuneiform presents an obscure outline by
overlapping with the intermediate cuneiform and cuboid bones.
Q Intertarsal joint spaces are clearly visible.
Talus
Cuboid
Lateral cuneiform
Os tibiale
Navicular
Medial cuneiform
Intermediate cuneiform
First metatarsal
Sesamoid bone
Phalanx
Inferior Extremity
103
y Metatarsals are seen articulating with the distal row of tarsal bones. The outline
of each is easily defined. The body of the first metatarsal is heavy, but the bodies
of the remainder are slender. The bases tend to overlap.
O Navicular is an additional element between the two rows of tarsal bones and is
interposed between the talus of proximal row and the medial three bones of the
distal row.
M Phalanges are seen separated by the interphalangeal joints.
Talus: Its posterior part cannot be made out clearly.
U Tarsal bones
i. Proximal row of tarsal bones is comprised of talus and calcaneum which do
not lie side by side but are placed one above the other.
ii. Distal row comprises of four bones. N a m e d from the medial side to the
lateral side, they are medial cuneiform, intermediate cuneiform, lateral cuneiform and cuboid. These bones are seen lying side by side.
tf Sesamoid bones: Prominent medial and lateral sesamoid bones are usually seen
to overlap the head of the first metatarsal bone,
i ) Supernumerary bones: There are three common ones.
i. Os tibiale lies close to the tuberosity of navicular (Fig. 8.5)
ii. Os trigonum lies at the posterior end of the talus (Fig. 8.6)
iii. Os peronei is a sesamoid bone in the tendon of peroneus longus and lies
close to the cuboid (Fig. 8.6).
Lateral View of the Ankle a n d Foot (Fig. 8.6)
Calcaneum
"Os peronei
-Cuboid
Medial cuneiform -
M1-
-M5
M2-
-M4
-M3
Bone Age
SKELETAL MATURATION (Fig. 9.1)
In early foetal life, a long bone is preceded by a model of hyaline cartilage. The
areas where the bone formation or ossifications start in the cartilaginous model are
known as centres of ossification. These centres may be primary or secondary. As a
rule primary centres appear before birth and the secondary centres after birth. A
typical long bone ossifies in three parts, the two ends from secondary centres and
the intervening shaft from a primary centre.
Epiphysis
Epiphyseal centre
Epiphyseal disc
Diaphysis
Line of fusion
of epiphysis
and diaphysis
of fusion
105
106
The secondary centres are also known as epiphyseal centres of ossification and
the age at which they first become visible on a skiagram is known as the date of
appearance of the epiphysis. These epiphyseal centres appear at different ages in
different parts of the skeleton. In early stages of ossification, an epiphysis appears
as an irregular nodule on the skiagram. Sometimes ossification starts from several
centres simultaneously, as in the patella, but these soon merge into a single bony
mass.
The epiphyseal ossification spreads and gradually replaces the cartilaginous
epiphysis except where it is adjacent to diaphysis. The cartilage which persists
between the epiphysis and the diaphysis is known as the epiphyseal disc. It appears
as a narrow translucent band in a skiagram. The cartilage of this disc grows and is
progressively replaced by bone which is added to the end of the diaphysis. Growth
in length of the bone ceases when the cells of the cartilage cease to multiply, bone
from the metaphysis then extends across the epiphyseal disc. Osseous contiguity is
thus established between the epiphyseal and the diaphyseal ossification. This is
known as the "fusion of the epiphysis" in radiological terms. The bone formed at
the site of epiphyseal disc is particularly dense and is recognisable on the radiographs of young and even middle-aged adults. Knowledge of this prevents confusion
with fracture lines.
The growing skeleton is sensitive to relatively slight and transient illnesses and
to periods of malnutrition. Proliferation of cartilage at the metaphysis slows down
during starvation and illness, but degeneration of cartilage cells in the columns
continues, producing a dense line of provisional calcification which later becomes
bone with thicker trabeculae called "lines of arrested growth" as seen in X-rays.
In some cases of endocrinopathy, chromosomal aberration, Morquio's syndrome,
or dyschondroplasia, whole group of ossification centres may fail to appear.
PRINCIPLES OF OSSIFICATION
1. The primary centres appear before birth (usually between seventh and twelfth
week) with some exception. The primary centres of tarsal and carpal bones
appear after birth, excepting those of talus, calcaneum and cuboid.
2. The secondary or epiphyseal centres appear, as a rule, after birth (usually
from the time of birth to five years of age) excepting at the lower end of
femur, and sometimes at the upper end of the tibia and the upper end of
humerus.
3. The development of short bones is similar to that of the primary centres of
long bones and only one the calcaneum, develops a secondary centre of
ossification.
4. In long bones with two epiphyses, the epiphysis whose centre of ossification
appears first is usually the last to fuse with the shaft. The fibula is an exception
to this rule. The centre for the head appears later than that for the distal end,
but fuses later. The centre appears first in the lower end because it is a pressure
epiphysis. The delay in fusion of the upper end may be associated with more
prolonged growth at the knee (growing end).
Bone Age
107
5. In long bones with a single epiphysis, that epiphysis is at the more movable
end. Thus in metacarpals, metatarsals and phalanges, these epiphyses include
the heads of metacarpals and metatarsals 2 to 5, and the bases of the first
metacarpal and metatarsal and the bases of all the phalanges.
6. The epiphyseal centre of ossification appears earliest in the largest of the
epiphysis of a long bone.
7. When epiphysis forms from more than one centre (e.g. proximal end of
humerus) the various centres coalesce before union occurs with the diaphysis.
8. From twelve or fourteen years to twenty five years epiphyses fuse with the
diaphyses, and growth ceases as fusion occurs.
9. In general, the appearance of epiphyseal centres and their fusion occur about
one year earlier in females than in males so that the female skeleton matures
more rapidly than the male. The longer period of growth in the male accounts
partly for the average greater size of the male adult, just as the earlier start in
the female accounts for the greater size of the average girl until the teenage is
reached.
"BONE AGE" ESTIMATION
The age of a growing skeleton may be fairly reliably estimated since the appearance
and union of the centres of ossification occur in a fairly definite pattern and time
sequence from birth to maturity. Roentgenologic study of osseous development
provides a valuable guide for evaluation of normal and abnormal growth. The
skeletal maturity of any individual is known as the 'bone age'. A radiologist
determines the bone age of a person by assessing ossification centres. Two criteria
are used.
i. The n u m b e r and size of e p i p h y s e a l centres d e m o n s t r a b l e at a given
chronological age. The time of appearance is specific for each epiphysis of each
bone for each sex. Thus the principles governing their sequence and their site
of appearance should be known
ii. The disappearance of the dark line representing the epiphyseal cartilage plate
which indicates that the epiphysis has fused to the diaphysis. The sequence of
dates of union is remarkably constant and the intervals between them remain
proportionately the same in different people.
Students are no longer required to memorize long lists of dates as these can always
be referred to in a book, but it is important in radiographs of the young and adolescent
to be able to recognise the sites of epiphyseal lines in order to distinguish them from
fracture lines. Traumatic separation of the epiphysis from the diaphysis may
sometimes occur, e.g. the medial epicondyle of the humerus.
The chronological order of appearance of ossification centres and of union of
epiphysis with diaphysis have been summarised in Tables 9.1 to 9.3.
Dates given for individual bones in this text are approximations based on those
given in Grays Textbook of Anatomy.
For convenience, figures for the male are given. In females, they are about one to
two years earlier as mentioned before.
SUPERIOR EXTREMITY
S e q u e n c e of Ossification a n d Union at the Shoulder
(Figs 9.2a to f)
Appearance
1st year - Head of humerus
2nd year - Greater tuberosity
5th year - Lesser tuberosity (not visible)
6th year
Fusion
~A-1st year
F-6th year-
A -2nd
year
-A-5th year
F-20th yea i
A = Appearance F = Fusion
Bone Age
109
Fig. 9.2c: Age above 1 year (epiph head humerus present) below 2 years (epiph. gt. tub.
absent)
Fig. 9.2d: Age above 2 years (epiph. gt. tub. present) below 6 years (epiph. head and gt. tub.
not fused)
110
Radiological Anatomy
Fig. 9 . 2 e : A g e a b o v e 6 y e a r s ( e p i p h . h e a d a n d g t . t u b , f u s e d ) b e l o w 2 0 y e a r s ( e p i p h n o t f u s e d
with shaft)
Fig. 9.2f: A g e a b o v e 2 0 y e a r s ( e p i p h . h e a d u n i t e d w i t h s h a f t )
Bone Age
SEQUENCE OF OSSIFICATION A N D UNION AT THE ELBOW
111
(Figs 9.3a to h)
Appearance
1st year
5th year
6th year
9th year
10th year
12th year
Fusion
of
of
of
of
of
A-12th
F-16th
A-1st
F-16th
-A-6th year
F-20th year
year
year
year
year
A-9th year
F-16th year
A-10th year
F-15th year
A-5th year
F-17th year
A-15th year
A = Appearance F = Fusion
Fig. 9.3a: Elbowossification and union
Fig. 9 . 3 b : A b i r t h ( e p i p h . a b s e n t )
Fig. 9.3c: A g e a b o v e 1 y e a r ( e p i p h . c a p i t u l u m a n d l a t t r o c h l e a p r e s e n t ) b e l o w 5 y e a r s ( e p i p h ,
h e a d radius a b s e n t )
Fig. 9 . 3 d : A g e a b o v e 5 y e a r s ( e p i p h . h e a d r a d i u s p r e s e n t ) b e l o w 6 y e a r s ( e p i p h .
epicondyle absent)
med
Bone Age
113
Fig. 9 . 3 e : A g e a b o v e 6 y e a r s ( e p i p h , m e d . e p i c o n d y l e p r e s e n t ) b e l o w 10 y e a r s ( e p i p h . m e d .
trochlea
absent)
aPsent)
Fig. 9.3g: A g e a b o v e 11 y e a r s ( e p i p h t o p o l e c r a n o n p r e s e n t ) b e l o w 15 y e a r s ( e p i p h . o l e c r a n o n
not fused with shaft)
Fig. 9.3h: A g e a b o v e 16 y e a r s ( e p i p h . l a t . e p i c o n d . c a p i t u l u m a n d t r o c h l e a f u s e d t o s h a f t )
b e l o w 17 y e a r s ( e p i p h . h e a d r a d i u s n o t f u s e d t o s h a f t )
Bone Age
(Figs 9.4a to j)
Appearance
1st year
2nd year
3rd year
4th year
5th year
6th year
12th year
Fusion
17th year
18th year
19th year
Fusion
Fusion
Fusion
Fusion
of
of
of
of
the
the
the
the
A-3rd year
F-18th year
A-2nd year
F-18th year
A-3rd year
F-17th year
A-5th year
A-1st year
F-19th year
A = Appearance F = Fusion
115
116
Radiological A n a t o m y
Fig. 9 . 4 b : A t b i r t h ( n o c a r p a l b o n e ossified)
Fig. 9.4c: Age above 1 year (Capitate, hamate and epiph. lower end radius present) below 2
years (epiph 2nd to 5th metacarp. heads absent)
Fig. 9.4d: A g e a b o v e 2 y e a r s ( e p i p h . 2 n d t o 5 t h m e t a c a r p . h e a d s a n d b a s e s p r o x . p h a l a n g e s
p r e s e n t ) b e l o w 3 y e a r s (ossif. c e n t r e t r i q u e t r a l a n d 1st m e t a c a p . b a s e a b s e n t )
Bone Age
117
Fig. 9.4e: Age above 3 years (triquetral and epiph. 1 st metacarp base present) below 4 years
(ossif. centre iunate absent)
Fig. 9.4f: Age above 4 years (lunate present) below 5 years (ossif. centres scaphoid, trapezium
and trapezoid absent)
Fig. 9.4g: Age above 5 years (scaphoid, trapezium and trapezoid present) Pelow 6 years
(epiph. lower end ulna absent)
Fig. 9.4h: Age above 6 years (epiph, lower end ulna present) below 12 years, cossif. centre
pisiform absent)
Fig. 9.4j: Age above 19 years (epiph lower end of radius fused)
120
Radiological Anatomy
INFERIOR EXTREMITY
S e q u e n c e of Ossification a n d Union at the Hip Region
(Figs 9.5a to g)
Appearance
A-12th year
F-15th year
F-8th year
A = Appearance F = Fusion
Bone Age
121
Fig. 9.5c: Age above 1 year (epiph. head femur present) below 4 years (epiph. gt. trochanter
absent)
122
Radiological Anatomy
Fig. 9.5d: A g e a b o v e 4 y e a r s ( e p i p h . g t . t r o c h a n t e r p r e s e n t ) b e l o w 8 y e a r s ( r a m i o f p u b i s a n d
ischium not fused)
Fig. 9.5e: A g e a b o v e 8 y e a r s ( r a m i o f p u b i s a n d i s c h i u m f u s e d ) b e l o w 16 y e a r s ( e p i p h . g t .
t r o c h a n t e r n o t fused with shaft.)
Bone Age
123
Fig. 9.5f: Age above 16 years (epjph. gt. trochanter fused with shaft) below 17 years (epiph,
head femur not fused with shaft)
Fig. 9.5g
A g e a b o v e 20 y e a r s (fusion of t h r e e p a r t s of h i p b o n e a t a c e t a b u l u m )
(Figs 9.6a to h)
Appearance
A-1st year
F-18th year
A-4th y e a r F-19th year
A-10th year
A = Appearance F = Fusion
Fig. 9.6b: At birth (epiph. lower end femur present and upper end tibia may also be present)
Fig. 9.6c: Age above 1 year (epiph. upper end tibia present) below 4 years (epioh. upper end
fibula absent)
Fig. 9.6d: Age above 1 year (epiph. upper end tibia present) Pelow 3 years (ossif. centre patella
absent)
126
Radiological A n a t o m y
Fig. 9.6f: Age above 4 years (epiph, upper end fibural present, below 18 years (epiph.femur
and tibia not used with shaft)
Fig. 9 . 6 g :
A g e a b o v e 10 yrs ( e p i p h , t i b i a l t u b . p r e s e n t ) b e l o w 18 yrs ( e p i p h . f e m u r a n d t i b i a n o t
Fig. 9.6h: Age above 19 years (epiph. upper end fibula fused with shaft)
Present at birth
Calcaneum
Talus
Cuboid (may be present at birth)
Lower end of tibia
Lower end of fibula
Lateral cuneiform
Medial cuneiform
Intermediate cuneiform
Navicular
Base of first metatarsal
Heads of second, third, fourth and fifth metatarsals
Bases of phalanges
Medial malleolus becomes bony
Epiphysis for the posterior part of calcaneum
6th month
1st year
2nd year
3rd year
7th year
8th year
Fusion
16th year
17th year
Fusion
Fusion
Fusion
Fusion
18th year
of
of
of
of
A-1st year
F-17th year
A-1st year
F-17 year
A-Before birth
A-3rd year
A-6th month
A-2nd year
A-1st year
A-3rd year
F-18th year
A-3rd year
F-18th year
A-2nd year
F-18th year-
A-3rd year
A-6th year
Fig. 9.7d: Age above 8 years (epiph. post part calcaneum present) below 16 years (epiph.
calcaneum not fused to its body)
Fig. 9.7e: Age above 16 years (epiph. calcaneum fused with its body) below 17 years (epiph,
lower end of tibia not fused with shaft)
Fig. 9.7f: Age above 18 years (epiph of metatarsals fused with their shafts)
GENERALISATION
1. Bone age estimates the percentage of completed growth more accurately than
chronological age. It is only occasionally helpful diagnostically but is valuable
in predicting:
a. final height
b. age of reaching adult stature.
c. puberty timing (when bone age is very discrepant from chronological age,
e.g. a 9-year-old child with bone age of 6-year will probably enter puberty
late compared to his peers.)
2. The ossification centres which are normally present at birth are in three long
bones and three short bones. They may be recalled by the following mnemonic.
Full-Term Child Has These Centres
3.
4.
5.
6.
Ossification of the distal end of femur occurs during the last two foetal months.
Absence of the centre at birth is good presumptive evidence of prematurity and
appearance is medicolegal evidence of full-term development.
In early childhood, the small bones of the foot undergo the most rapid changes
and, therefore, are most satisfactory for evaluation of development in the early
months Note that the first three tarsals (calcaneum, talus and cuboid) ossify in
order of size
After six months of age, the wrist and hands are more useful. Usually the carpal
centres are not present at birth, but the first (capitate) appears at about two months
of age. Note that the first three carpals (capitate, hamate and triquetral) ossify in
order of size. Note also the spiral sequence of ossification in the carpus, starting
with the largest and proceeding to the next largest in the same row, but omitting
the pisiform capitate, h a m a t e , triquetral, lunate, scapoid, t r a p e z i u m and
trapezoid.
All the metacarpal and phalangeal epiphyseal centres normally are demonstrable
radiologically during the third year.
The ossification of the distal radial epiphysis occurs at about 1 year of age.
The distal ulnar epiphysis is present at 6 to 8 years of age in girls and at about 7
to 10 years of age in boys.
In girls, the appearance of a sesamoid bone at the distal end of the first metacarpal
indicates the menarche (age at which menses begin) within one or two years.
The postnatal ossification centres that have the highest statistical "communality"
and hence the greatest predictive value in skeletal assessment are located in the
h a n d , foot and knee. Thus three r a d i o g r a p h s can actually p r o v i d e more
diagnostically useful in formation than the larger number often made. At puberty,
however, more attention must be given to the centres of the hip, iliac bones, and
the sesamoids of the thumb and other fingers.
As with other criteria of normal growth and development,normal variations must
be taken into consideration. Thus there are racial and sex variations in bone
maturation. Negroes show more rapid early maturation than Caucasians; skeletal
development of girls is advanced over that of boys slightly so at birth but by as
much as two years at puberty. In general osseous development correlates well
with weight, height, and sexual development. Correlation of bone age with age
at menarche is closer than that of chronological age and age at menarche.
Bone Age
133
1st year
Head of humerus
2nd year
3rd year
4th year
Greater tuberosity
Lesser tuberosity
Capitulum and
lateral part of
trochlea
Head of radius
Triquetral bases of
Heads of 2nd-5th first matacarpal,
bases middle and terminal
phalanges
p r 0 ximal phalanges
m a tacarpals
Head of femur
'
Lunate
Intermediate
Lower end of tibia
lower end of fibula
lateral cuneiform
I'l"/
Scaphoid
trapezium
trapezoid
Greater trochanter
Cuboid
5th year
Medial cuneiform
cuneiform navicular
heads metatarsals
<?rst metatarsal base
bases of phalanges
Patella
134
Radiological A n a t o m y
T a b l e 9.2:
6th year
8th year
9th year
10th year
12th year
Medial epicondyle
Top of olecranon
process
'isiform
Lesser trochanter
Tibial tubercle
Bases of distal
phalanges
Lateral epicondyle
Posterior part of
calcaneum
Bone Age
135
16th year
17th year
18th year
19th year
20th year
Olecranon
Lateral epicondyle,
capitulum trochlea
.
.. ,
ease or rirst
metacarpal
Lesser trochanter
greater trochanter
Medial epicondyle
Head of radius
Three parts of
hip bone
Head of femur
Posterior
part of calcaneum
Lower end of
radius
Epiphysis of
metatarsals
and phalanges
Upper end of
fibula
Thorax
CHEST
The importance of X-ray examination of the chest is very great in diseases of the
lungs and heart. The ordinary standard X-ray film of chest is a postero-anterior
view (PA) that is to say one taken with the film against the front of the patient's
chest and the X-ray tube two metres behind the patient. With the subject sitting or
standing the hands are placed on the waist and the elbows are pointed anterolaterally. This moves the scapulae from the lung fields. The skiagram is taken when
the breathing is momentarily stopped after taking a deep inspiration.
RADIOGRAPHIC APPEARANCES
Postero-anterior View (Fig. 10.1)
Left border of
sternomastoid
First rib
v e r tebra
^ T , vertebra
Scapula
Clavicle
Trachea
Right brachiocephalic
vein and artery
Aortic knuckle
Superior vena cava
Axillary fold
Main pulmonary artery
Lung field
Hilar shadow
Ascending aorta
Right atrium
Breast
Inferior vena cava
Diaphragm
Left ventricle
Cardiophrenic angle
Liver
Costo-phrenic angle
Air in stomach
Fig. 10.1: Thoraxpostero-anterior view
Q
Q
y
y
region
region
region
An axial projection of a vessel (end on) gives perfectly circular opacity, which
should not be mistaken for a pulmonary lymph node.
Q Lung fields: The translucency of the lung parenchyma is due to the presence of
air in the alveoli and bronchi. The fine mesh structure distinguishable on the
X-ray film and which is commonly called, 'pulmonary stroma' is mainly due to
a fine and rich system of arteries, veins and lymphatics. The peripheral ends of
larger vascular units originate in the pulmonary hilar. For radiological purposes
the lung fields are divided into three zones
i. Upper zoneextends from the apex to a line drawn through the lower borders of the anterior ends of the second costal cartilages. The apex of each
lung is seen to extend above the clavicles in this zone. Upper zone can be
further sub-divided into the following regions.
Supraclavicular or apicalsituated above the clavicles.
Infraclavicularsituated below the clavicles.
ii. Middle zoneextends from the lower limit of upper zone to a line drawn
through the lower borders of the fourth costal cartilages and contains the hila
of the lungs.
iii. Lower zone (Basal)extends from lower limit of midzone to the base of the
lungs.
Transparency of lung fields varies with each type of person. In fat people they
are manifestly less transparent than in thin and wasted ones. In women the breasts
diminish the transparency of lung fields. Usually the lung bases are clearer than the
middle zone because of the thicker soft tissue on the chest wall in this region, and
also because of the presence of the hilum and mediastinal ramifications.
Thorax
139
Q Ribs: The lungs are striped by the projection of the overlying ribs. Only the
bony part of the ribs appear on radiographs. The costal cartilages do not show
and so the anterior ends of ribs appear not to reach the sternum. The outline of
the anterior portions of the ribs is clear than that of the posterior portions, because
of the proximity to the film, but the posterior portions are more opaque because
of their greater content of calcium salts. The anterior ends of the ribs are seen to
lie at a lower level than the posterior ends. The posterior parts are directed
downwards and laterally, the anterior parts downwards and medially.
The posterior parts of the ribs behind the mediastinal shadow and below the
level of the diaphragm are not seen.
Q The first rib can be identified by noting the following characteristics.
Its broad anterior end.
Its articulation with the first thoracic vertebra (Tl) whose transverse process
is inclined upwards and laterally in contrast to the transverse process of
seventh cervical vertebra (C7) which has its transverse process directed
downwards and laterally.
Abnormalities of ribs concerning their number and shape are relatively common.
Cervical ribs, unilateral or bilateral, give apical shadow.
O Scapulae: The medial borders and inferior angles of the scapulae are easily
recognised. They mask some pulmonary details.
Q Sub-diaphragmatic area: On the right side the radiopacity of liver shadow merges
with the dome of the diaphragm.
Q Trachea: Only its upper half is seen as transparent tube, with the lower cervical
and upper thoracic vertebrae seen through it. It normally lies in the median plane
but towards its bifurcation it usually inclines somewhat to the right.
Right or Left Lateral View (Fig. 10.2)
When right or left lateral view of the chest is desired that side of the person is placed
closest to the film, and the arms are raised out of the projection as much as possible.
O Cardiac shadow rests on the anterior half of the diaphragm.
O Cupolae of diaphragm can be identified inferiorly by their different levels. The
left is at higher level with the gastric air bubble just beneath its upper border,
somewhat anterior to the mid line.
Descending aorta can be identified in the retrocardiac space.
^ Inferior angles of the scapulae are often seen superimposed on this regions.
Q Lung fields extended posteriorly for about 1.5 cm behind the bodies of the thoracic
vertebrae and inferiorly up to the diaphragm. The posteroinferior part of the
lung which cannot be seen in an anterior view, since it lies below the level of the
highest point of the dome of the diaphragm, can readly be examined in a lateral
view. The upper part of the lung fields are somewhat obscured by the shoulder
girdles.
y Oesophagus lies in the retrocardiac space anterior to the descending arorta. It
can be seen only if it is filled with a contrast medium.
^ Retrosternal space is the translucent space between the heart and the sternum.
SternumTrachea
Arch of aorta
Retrosternal space
Inferior angle of scapula
Pulmonary trunk
Thoracic vertebrae
Descending aorta
Right ventricle
Retrocardiac space
Left ventricle
Cupolae of diaphragm
Fig. 10.2: Thoraxlateral view
Thorax
141
Q Retrocardiac space is the translucent space separating the heart from the thoracic
vertebrae.
O Sternum is seen anteriorly.
Q Thoracic vertebrae are clearly seen posteriorly.
Q Trachea appears as a translucent tube coming down from the neck up to the
level of the sixth thoracic vertebra.
The Right Anterior Oblique View (Fig. 10.3)
In this position the patient is rotated so that his right side is in contact with the
casette, and he is rotated away from the casette approximately 45. This view is
valuable for visualisation of oesophagus, the left atrium, the arch of the aorta and
the mediastinal glands.
y Arch of aorta is fore-shortened and may be recognised curving posteriorly from
the upper end of the heart shadow,
y Ascending aorta is seen arising from the upper end of the heart shadow. It is
separated from the sternum by the translucent retrosternal space which actually
is the anterior mediastinum and contains some lymph nodes.
D Clavicle and sterno-clavicular j oint of right side are seen in the upper part of the
skiagram.
y Descending arota is situated in the retrocardiac space just anterior to the bodies
of the vertebrae.
^ Dome of the left side of the diaphragm is seen in the lower part of the skiagram.
Q Heart shadow is seen extending u p from the anterior half of the dome of
diaphragm. Anteriorly it lies close to the sternum and may overlap it.
y Left atrium (LA) and lower down the Right atrium (RA) are in contact with the
oesophagus.
Q Lung fields, right and left, are partly overlapped.
y Prevertebral window is a triangular translucent area between the vertebrae and
the brachio-cephalic shadow.
Pulmonary trunk bifurcation and the left pulmonary veins cast a round or oval
shadow anterior to or partly overlapping the left bronchus,
y Retrocardiac space separates the heart from the spine posteriorly,
y Descending aorta and oesophagus lie in the retrocardiac space which represents
the posterior mediastinum. Oesophagus is visible only when filled with a contrast
medium.
^ Superior vascular p e d i c l e or brachiocephalic s h a d o w f o r m e d by the
brachiocephalic veins and the innominate, left common carotid and left subclavian
arteries is seen extendin from the top of the arch of aorta,
y Trachea is seen as a dark tubular shadow, going downwards from the neck,
crossing the shadow of the arch of aorta and then dividing into right and left
bronchus about 3.75 cm anterior to the body of the sixth thoracic vertebra.
142
> Radiological A n a t o m y
Trachea
Superior vascular
pedicle
Right clavicle
Prevertebral window
Arch of aorta
Thoracic vertebra
Ascending aorta
Pulmonary trunk
Left atrium
Descending aorta
Oesophagus
Right atrium
Right ventricle
Thorax
143
In this position the subject is rotated 45 with the left shoulder anterior against the
cassett.
Q Aortic arch is seen in its entirety. It takes a rather wide sweep so that the upper
part of the descending aorta overlaps the vertebral bodies posteriorly,
t ) Aortic triangle is a translucent triangular area in the upper part of the skiagram.
It is bounded below by the top of the aortic arch, anteriorly by the superior
vascular pedicle (the edge is formed by the oesophagus and left subclavian artery)
and posteriorly by the thorac vertebrae,
y Aortic window is a translucent space bounded above by the aortic arch, below
by the left atrium, to the right by the descending aorta and to the left by the
ascending aorta and the pulmonary trunk.
Q Clavicle (of left side) is conspicuous.
t ) Cupola (Lt) of the diaphragm appears to the right of the skiagram,
y Heart shadow has the left ventricle just in front of the anterior margin of the
thoracic spine. This is the posterior basilar portion of the left ventricle (LV). Above
this lies the left atrium (LA). The anterior margin of the silhouette is formed
inferiorly by the right ventricle (RV) and above this by the right atrium (RA).
This is the only view in which the right ventricle is adequately and definitely
seen.
O Pulmonary artery of left side is seen in the clear space above the left atrium.
Q Trachea passes downwards across the aortic window as a translucent tube.
BRONCHOGRAPHY
It is used to visualise the bronchial tree and is an important aid for diagnosis and
localisation of lung diseases.
Method for Bronchography
Left clavicle
Trachea
Superior vascular pedicle
Aortic triangle
Arch of aorta
Aortic window
Left pulmonary artery
Right atrium
Left atrium
Right ventricle
Left ventricle
Thorax
145
B. Technique of bronchography
The procedure is explained to the patient to gain his confidence.
The throat is sprayed with 2 per cent local anaesthetic at intervals of 5 to 7
mts. Usually 3 to 4 sprays are sufficient to anaesthetise the throat and this is
confirmed by testing for the absence of pharyngeal and palatal reflexes, at
the same time the patient also complains of difficulty in swallowing.
The anaesthetic is sprayed over the posterior pharyngeal wall, palate, pillars,
fossae, posterior part of the tongue, epiglottis and deep over the carina. During
the spray the tongue should be pulled out with the help of a piece of gauze to
get a good field. After this endotracheal injection of local anaesthetic is given
through the cricothyroid membrane. As an alternative it can be injected from
the back of tongue with the help of a laryngeal cannula. Usually it takes about
6 to 7 ml of local anaesthetic to anaesthetise both sides of the bronchial tree
and trachea.
i. Endotracheal catheterisation: In this procedure the dye is put in with the
help of a catheter passed through the nose into the trachea.
Usually 10 cc of dye is required for opacifying one side of bronchial tree.
ii. Bronchoscopic route: This is very m u c h similar to the e n d o t r a c h e a l
catheterisation except that the bronchoscope is used in place of a catheter
and the dye is injected through it.
After injecting the dye by any of the above procedures the patient is subjected to
screening and chest skiagrams are taken in the following positions.
(a) For unilateral purpose
PA
Lateral views.
(b) For bilateral purposes
PA
Right anterior oblique and left anterior oblique views.
(C) Post-bronchographic period
After bronchography the patient is not allowed to take anything orally for
two hours as there could be a danger of aspiration.
Postural drainage is resorted to help early elimination of the dye from the
lungs.
Anterior Bronchogram (Fig. 10.5)
Lung
(a) Upper lobe bronchus arises postero-superiorly a short distance from the trachea
and is a short and wide air tube directed laterally. It divides into its three segmental
branches.
i. Apical bronchus passes upwards towards the medial third of the clavicle.
ii. Anterior bronchus directed d o w n w a r d s and laterally.
Trachea
Posterior
Apical posterior
Anterior
Anterior-^
Superior dorsal
Intermediate bronchus
Lingular bronchus
Superior dorsal
Middle lobe bronchus
Superior lingular
Lateral
Medial
Right lower lobe bronchus
Anterior basal
Medial
Lateral basal
Posterior basal
-Inferior lingular
Left lower lobe bronchus
Anteromedial basal
Lateral basal
Posterior basal
Fig. 10.5: A n t e r i o r v i e w o f b r o n c h i a l t r e e
Thorax
147
iii. Posterior bronchus lies mostly posterior to apical bronchus and so is not clearly
distinguishable. The continuation of the main trunk is called the intermediate
bronchus.
b. Middle lobe bronchus arises anteromedially from the intermediate bronchus
and divides into two segmental branches for the supply of the middle lobe.
i. Medial and
ii. Lateral
These segmental bronchi overlap the lateral basal bronchus of the lower lobe.
c. Lower lobe bronchus
i. Superior or dorsal bronchus arises posterolateral^ from the intermediate
bronchus and is directed backwards. It is seen as a ring shadow with small
radiating branches near the level of origin of middle lobe bronchus opposite
7th thoracic vertebra.
The further continuation of the main bronchial trunk is the basal bronchus
which subdivides to form four basal segmental bronchi.
ii. Lateral basal bronchus overlapped by middle lobe bronchi.
iii. Medial
basal
iv. Anterior basal a n d
lingular
and
ii. Inferior lingular bronchi which are directed downwards and laterally
b. Lower lobe bronchus is short given after a few millimetres.
i. Superior segmental (dorsal) bronchus is immediately below the level of origin
of the upper lobe bronchus. The lower lobe bronchus then continues as the
basal bronchus which subdivides to form the basal segmental bronchi.
ii. Lateral basal bronchus is just below the lingular bronchus.
iii. Anteromedial. The small medial and somewhat larger anterior basal bronchi
arise from a common stem, and is called the anteromedial basal bronchus.
iv. Posterior basal which along with the anteromedial basal bronchus is placed
more medially
148
Radiological Anatomy
LATERAL BRONCHOGRAMS
Right Lung (Fig. 10.6)
Q Upper lobe bronchus is seen end on at the intervertebral disc between D5 and
D6 vertebrae. Its three segmental bronchi are seen as follows.
i. Apical bronchus is directed u p .
and
ii. Medial bronchi are directed forwards parallel to the anterior bronchus and a
little below it.
Lower Lobe Bronchus
i. Superior (dorsal) bronchus is directed backwards at about the same level (D7)
as the middle lobe bronchus.
ii. Posterior basal bronchus overlaps the vertebral column and is directed into
the constodiaphragmatic angle.
iii. Anterior basal bronchus is seen overlapping the shadows of diaphragm and
liver.
iv. Lateral
basal and
v. Medial basal bronchi appear between the anterior and posterior basal bronchi.
Left Lung (Fig. 10.7)
Upper lobe
bronchus
Bronchus
i. Superior
and
ii. Inferior lingular bronchi are seen directed downwards and forwards at the
level of the intervertebral disc between D6 and D7 vertebrae.
Lower lobe
bronchus
and
iii. Posterior basal bronchi can be recognised as on the right side, mainly between
the heart shadow and vertebral column.
Oesophageogram
(Fig. 10.8)
Thorax
Superior
Lower lobe bronchus
Medial basal
Posterior basal
Anterior basal
Lateral basal
149
164>Radiological A n a t o m y
Anterior
Apical posterior
Lingular bronchus
Superior lingular
Superior
Inferior lingular
Anteromedial basal
Posterior basal
Lateral basal
Thorax
Ii?"
Aortic arch
indentation
Left bronchus
indentation
Concavity for
left atrium
Air under
diaphragm
Fig. 10.8: O e s o p h a g e o g r a m l e f t a n t e r i o r - o b l i q u e v i e w
151
152
Radiological Anatomy
The material used is barium sulphate mixed with water to form a 50% suspension.
Oesophageograms are radiographs of the chest, with barium delineating the
oesophagus, obtained in posterio-anterior, oblique and lateral projections.
The proper examination involves a combination of fluoroscopy and radiography.
The patient stands behind the fluoroscopic screen and is asked to take several
swallows of the thin barium mixture. This is watched as it passes through the entire
oesophagus and into the stomach and the patient is rotated into various positions
so that the entire circumference of the oesophagus is brought into profile. X-ray
films are taken during the fluoroscopic study.
A left anterior oblique view for example will show three shallow concave
indentation on the barium shadow. From above downwards they are
1. First is due to the aortic arch and immediately below this there is frequently a
second shallower indentation due to.
2. The left bronchus. Lower down a long shallower anterior concavity due to
3. The left atrium.
We depend upon the oesophagus to delineate most accurately the retrocardiac
structures, as it is a close anterior relation of descending aorta. In view of these
relations enlargements of the atria or descending thoracic aorta can be diagnosed
by observing the oesophageal displacements caused by them.
Abdomen
and Pelvis
PLAIN X-RAY ABDOMEN
This X-ray of the abdomen is also called "KUB" film, since it is usually employed in
the examination of the urinary tract and the letters symbolise "Kidneys, Ureters
and Bladder". The following features are noticeable,
a. Bony structures
Coccyx
Iliac crests
153
154
Radiological Anatomy
Lower ribs_
Lumbar vertebra-
Kidney
~ Splenic shadow
~Psoas shadow
Coccyx -
Symphysis pubis
155
Lower ribs
Lumbar vertebrae
Sacral foramina
Sacro-iliac joints
Symphysis pubis
b. Soft tissues
Alimentary canal: It shows dark areas of translucency due to contained gas
e.g. the air in the fundus of stomach and splenic flexure of large bowel can be
seen below the left dome of diaphragm.
Kidneys: Cast clear shadow on each side of vertebral column.
Liver casts a shadow which merges with the right dome of the diaphragm
above and sometimes presents a well defined lower border close to the right
costal margin. In the middle line the shadow merges with that of the heart
and vertebrae, and the left extremity of the shadow of the liver is superimposed
on the transparent gas bubble of the stomach and is usually not recognisable.
Psoas muscle: It can be clearly seen with a well defined lateral margin
extending downwards and outwards.
Spleen: Its lateral part can often be identified on the left side.
CONTRAST RADIOGRAPHY
GASTROINTESTINAL TRACT
The alimentary tract is examined with the aid of a contrast medium. Their common
value depends on their outlining the internal shape of hollow organs. The most
commonly employed medium in present day radiography of the gastrointestinal
tract is barium sulphate in water suspension. 125 gm of barium sulfate powder to
180 ml of water is adequate in most patients. If the small intestines are to be examined
an additional 120 to 180 ml of the mixture should be given routinely.
BARIUM MEAL
Barium meal is flavoured with vanilla and sweetend with white saccharin. It has a
creamy consistency. Before giving b a r i u m meal the patient is prepared in the
following manner.
He should have nothing to eat or drink for six hours prior to the barium meal
and should not smoke, chew gum or take medicines during this period.
No purgative should be given the night before the examination as they tend
to cause misleading motor phenomena.
Medicines containing elements of high atomic weight such as bismuth, calcium
or magnesium should be discontinued at least three days prior to the test as
they may adhere to colon wall in the region of splenic flexure and cast a
confusing shadow.
156
Radiological Anatomy
The meal is best given at about 9 am. The patient drinks 0.5 to 1 pint (10 to 15 oz)
of barium emulsion so that stomach is filled up. The barium emulsion is then smeared
over the interior of the stomach by gentle pressure on the abdominal wall. The
p a t i e n t is r a d i o g r a p h e d i m m e d i a t e l y a f t e r t h e m e a l a n d t h e n at 1 / 2 hr,
1 hr and 1 Vi hours intervals. The stomach starts emptying its contents within a few
minutes of their reaching it. A half pint of barium suspension will usually have left
the stomach in two hours.
RADIOGRAPHIC APPEARANCE
(A) Stomach (Figs 11,2a t o e)
In most subjects in the standing position the stomach is 'J' shaped or Fish hook'
type. 'Steer-horn' type of stomach runs obliquely downwards and to the right and
narrows towards the pyloric end.
Q Position of stomach is subject to wide variations. It is assessed by reference to
incisura angularis. The stomach is higher in broad and stoky type of individuals
than in the slender type. It is fixed at its cardiac end just to the left of the eleventh
thoracic vertebral body, and by the first part of d u o d e n u m to the posterior
abdominal wall just to the right of the second lumbar vertebra. Between these
points it can vary in position according to its degree of distension and the posture
of the patient. The only guides to its location are that in the recumbent person it
rarely extends below the level of the anterior-superior iliac spines and that greater
part of it lies to the left of the midline.
O Fundus: The translucent gas bubble (German-magenblase) outlines the fundus.
Q Greater curvature: Outlines the gas bubble and then runs more or less parallel to
the lesser curvature but usually shows a bulge opposite the incisura angularis.
This curvature is more irregular in outline, especially in the descending part, on
account of indentations caused by the irregularly disposed gastric rugae. It forms
an acute p e r m a n e n t angle the cardiac notch, w i t h the left b o r d e r of the
oesophagus. Notches due to peristaltic wave may be seen in the distal half of the
greater curvature.
M Incisura angularis: At the junction of the body with the pyloric antrum the lesser
curvature increase abruptly to form this angular notch.
^ Lesser curvature: It runs almost vertically d o w n w a r d s to incisura angularis
whence it passes u p w a r d s and to the right. It forms the right border of the
stomach.
U Pyloric antrum is the wide part of the pyloric region narrowing to pyloric canal,
the terminal part of which is surrounded by the pyloric sphincter.
^ Pyloric canal: It appears as a column of barium, with parallel walls, about 2 to 3
mm wide and 5 to 8 m m long joining the pyloric antrum.
(B) Duodenum (Figs 11.2a t o e)
The duodenum receives the barium meal intermittently from the stomach. Its four
parts will be seen to have the following features.
Gas in fundus
Greater
curvature
Lesser
curvature
Incisura
angularis
Peristaltic
wave
158
Radiological A n a t o m y
Gas in fundus
Lesser
curvature
Duodenal cap
-Gastric
rugae
Greater
curvature
Incisura angularis
Pyloric canal
Pyloric antrum
Fig. 11.2b:
A b d o m e n and Pelvis
Gas in fundus
Lesser curvature
-Greater curvature
-Jejunum
Fig. 11.2c:
159
160
Radiological Anatomy
Duodenojejunal flexure*
Second part of duodenum
Duodenal c a p - f
Third part of duodenum5
-Fundus
- Rugae of
stomach
Jejunum
- Ileum
Fig. 11.2e:
S t o m a c h a n d s m a l l i n t e s t i n e IV2 h o u r a f t e r b a r i u m m e a l
162
Radiological Anatomy
O First part (duodenal cap): It functions as a separate entity. Its walls are smooth
in outline and owing to the protrusion of the pyloric end into the lumen of this
part of d u o d e n u m and its fixation to the abdominal wall, the opaque mass which
temporarily fills it, assumes the form of a solid Nace of spades', triangular in
shape with the base opposite the pyloric canal. The base forming a "stem and
leaf relationship with the pyloric canal. Usually it is upright, sometimes it lies on
its side, sometimes it is directed sagittally. This part is known radiographically
as the duodenal cap. Not only it is seen as an opaque mass but it lends itself
particularly well to compression whereby the barium in it is thinned by pressure
so that irregularities of the mucous membrane appear in relief. It most often
shows signs of disease. Radiologically a "fleck" (from the German meaning
"spot") is a loculation of barium of any size from a few millimetres to 2 or more
centimetres which strongly suggests a break in the normal mucosal structure
and ulceration. In view of the great frequency of ulceration in this area, the
detection of a fleck in this location is of extreme importance.
Q Second part: It gives a floccular shadow because the barium emulsion is broken
up into small portions,
t ) Third part: It is seen running transversely,
t ) Fourth part: It is directed upwards and to the left.
Q Duodeno-jejunal flexure: It is h i d d e n behind the stomach shadow and is
commonly seen above the incisura angularis close to the lesser curvature.
The passage of barium through the second, third and fourth parts is rapid. There
may be a short delay at the beginning of the third part.
The duodenum is in a fixed position for the most part, and hence variations
from its normal position become of significance in the detection of space
occupying lesions in adjoining structures, such as pancreas, lesser omental bursa,
colon, gallbladder and biliary ducts. There is, however, a considerable variation
in different individuals in the normal contour of the d u o d e n u m and this must be
borne in mind when radiography of the d u o d e n u m is attempted.
(c) Jejunum a n d Ileum (Fig, 11.3)
A b d o m e n a n d Pelvis
Stomach
Duodenum
Jejunum
-Ileum
163
164
Radiological Anatomy
i ) Distal part of ileum: It forms a more homogeneous shadow, coils are seen lying
in the pelvis. Last few inches are narrower than the rest. The terminal part is
seen running upwards and to the right to join the caecum on its inner side a
short distance above its base.
Barium
Enema
The large intestine can be examined either after a barium enema or a barium meal.
A barium enema is used in preference for most purposes. A necessary preliminary
is to cleanse the bowel thoroughly, and for this purpose the following procedure is
adopted.
A suitable purgative (castor oil 1-2 oz or Dulcolax tablets) is given 48 hours
before the examination to remove gross faecal masses.
A clear liquid diet is given for a period of 24 hours prior to X-ray.
A high colonic wash-out is given just prior to the examination. Three pints of
plain water or normal saline are run into the rectum from douche can, at a
pressure of about one foot of water. No soap should be used for colonic lavage.
After the patient has been thus prepared the whole colon is easily outlined by
slowly running in two to three pints of a simple barium sulphate suspension through
the anus. 300 gm of barium sulfate powder are added to each 1000 ml of tap-water.
Various drugs are sometimes added e.g. Clysotrast to help colonic peristalsis and
precipitate mucus which might otherwise cling to the mucosa. The result is an
improved post evacuation study.
(D) Large Bowel (Fig. 11.4)
O Appendix may sometimes be seen arising from the base of the caecum.
Q Caecum and ascending colon: Sacculations known as frustrations, are present in
proximal part of colon but may not be evident in the distal part if the pressure is
high.
Q Descending and pelvic colon: Descending colon is narrower than the ascending
portion. Pelvic colon may show a wide loop.
O Hepatic and splenic flexures: Owing to the acute angular curvatures in the
regions of the colic flexures and pelvic colon, there is superimposition of loops
in these regions.
Q Rectum can be seen closely related to sacrum in a lateral view.
Q Transverse colon: Particularly varies in length from quite a short one to a
redundant loop. The normal large bowel shows many variations in form.
Biliary
Tract
Splenic f l e x u r e -
-Hepatic flexure
-Transverse colon
-Ascending colon
Descending
colon
-Caecum
Rectum
Fig. 11.4: L a r g e b o w e l a f t e r b a r i u m e n e m a
166
Radiological Anatomy
suffering from uraemia, nephritis or diarrhoea. Another drug which has been
introduced recently is Oragrafin (Sodium ipodate).
The patient is prepared in the following manner.
A fat free evening meal is given at about 6 pm.
Twelve Telepaque tablets (4 gm) are given immediately after the meal (Single
oral method).
Nothing is given by mouth after midnight.
Film should be taken 14 hours after the ingestion of the tablets.
Immediately after the films are exposed the patient is given a fatty meal (50
gm of butter, 2 slices of bread and one glass of milk)
In an hour's time further radiographs are taken. These show the emptying
capacity of the gallbladder and often reveal stones which may only become
evident in the partially evacuated viscus.
ii. I n t r a v e n o u s c h o l e c y s t o g r a p h y : It m a y be used for visualisation of the
gallbladder if diarrhoea, pyloric obstruction or any other factor interferes with
the absorption of the orally administered contrast medium. As there is risk of
damage to the arm if the contrast medium should leak out of the vein during
an interavenous injection, the oral method, which is nearly as reliable as the
intravenous, should always be tried first.
Biligrafin (20% solution of sodium iodipamide) which contains 64% iodine is the
preparation of choice. The d r u g m u s t not be administered to a patient with
hyperthyroidism or to one known to be sensitive to iodine. Sensitivity to iodine
must be tested before administration.
No preparation is required. Moderate exercise is the best means of dispelling
gas from the intestine.
One or two 20 ml ampoules are warmed and given intravenously slowly
over a period of ten minutes.
Serial films are taken 10, 20 or 30 minutes after injection to visualise the
common bile duct.
Film to demonstrate gallbladder should not be made until IV2 to 2 hours after
injection as the gallbladder fills a considerable time after the ducts.
If the gallbladder is visualised the usual fatty meal is given and further
exposures are made after 30 minutes to demonstrate its power of contraction.
When cholecystography is completely negative further films after five hours
may demonstrate the biliary system.
RADIOGRAPHIC APPEARANCE
Cholecystogram
(Figs 11,5a to c)
A b d o m e n a n d Pelvis
Quadrilatera
area for
gall bladder
Gallbladder
167
168
Radiological Anatomy
Gall bladder
lumbar vertebra and the transverse extent from a point 2.5 cm to the right of the
median plane to a point 10 cm to the right of the median plane.
O Shape and size: Gallbladder appears as a pear-shaped homogeneous opacity.
The density of the s h a d o w is subject to considerable variation in normal
individuals.
When the gallbladder is not visualised it may mean any one or more of the
following possibilities"'
Markedly impaired liver function so that bile formation is impeded and the
dye is not excreted.
Obstructive disease of extra-hepatic bile ducts so that the dye does not reach
the gallbladder.
Pyloric obstruction or diarrhoea causing non-absorption of the dye.
Diseased gallbladder (chronic cholecystitis) results in non-concentration of
the dye. Non-function and occlusion of the gallbladder is demonstrated by
the fact that the dye, although present in the bowel, is not seen in the
gallbladder.
Subnormal function and the presence of non-opaque gall stones can also be
demonstrated by the lack of the usual density of the shadow of the dye in the
gallbladder in the former case, and by the presence of translucent shadows in the
outline of the gallbladder in the latter case.
169
Urinary Tract
In a plain skiagram of abdomen (KUB film) the kidney outlines can be cleary seen.
To outline the calyces, ureter and bladder, certain organic compounds containing
iodine in their molecule, have to be introduced either intravenously or through a
catheter to make the urinary tract radiopaque such an X-ray in which the urinary
tract is visualised by a radiopaque medium is called a pyelogram. Plain radiographs
of the abdomen should be taken first, before pyelography, as these will show whether
the kidneys are normal in size, shape and position, and whether there are any
abnormal opacities in the renal tract, which may require localisation by pyelography.
Occasionally, they m a y reveal non-renal conditions which make pyelography
unnecessary.
Descending Pyelogram
O The bladder: As time passes the amount of the contrast medium in the bladder
increases so that its outline and position are easily shown.
O The calyces: Three major calyces will usually be recognised directed laterally.
They are upper, middle and lower. The number may vary. Six to twelve cupshaped minor calyces are situated at the end of the major calyces.
A minor calyx consists of a neck and an expanded extremity cupped by projection
of the renal pyramid into its lumen.
170
Radiological Anatomy
Pelvis of ureter
Minor calyx
Major
calyx
Ureter
Fig. 11.6: D e s c e n d i n g
pyelogram
171
Kidney: Generally the passage of the drug through the kidney is too fast to
reach a useful concentration. If the outflow of secretion from the pelvis is
prevented or if the kidney is flooded with a very large amount of the drug, the
renal tissue becomes somewhat opaque to X-ray and a shadow of the kidney can
be obtained (Nephrogram). Attempts have been made to use this effect to show
disease process.
O The pelvis of ureter is funnel-shaped and narows towards it medial inferior
angle. It joins the ureter at an obtuse angle. The upper border is somewhat convex
and the inferior border presents a semi-circular concavity.
Q The ureters rim downwards close to tips of the transverse processes of the lumbar
vertebrae, and in front of the sacro-iliac joints. In the pelvis they cast a shadow
1 cm on the medial side of the brim and across the tip of the ischical spine from
where they turn medially to join the bladder shadow.
Ascending Pyelogram
Ureteric
catheter
Cystoscope
Minor calyx
Pelvis of ureter
Ureter
Ureteric catheter
Cystoscope
Fig. 1 1 . 7 : A s c e n d i n g
pyelogram
173
HYSTEROSALPINGOGRAPHY
Uterine tubes appear as passing from the upper angles of the uterus and taking a
tortuous course laterally. The calibre is less in the medial two-thirds, but is wider at
the ovarian ends.
Peritoneal spill of the contrast medium is a sign of patency of the fallopian tube.
Uterus cavity shadow appears triangular with the apex towards the pelvis.
PELVIMETRY
Direct Radiography of Female Pelvis (Fig. 11.9)
It is resorted to assess the configuration of the maternal pelvis as well as the age of
the foetus. In any case, radiation exposure of the patient and the foetus in the first
trimester of pregnancy is to be avoided unless and until very necessary. The following
criteria are used in giving an opinion as to the maturity of the foetus.
An ossification centre is present in the lower end of the femur in 90 per cent of
full-term foetuses; ossification of the hyoid bone is complete, and five out of six
cases will show ossification in the upper tibial epiphysis. Less practical standards
174
Radiological Anatomy
Fundus of
uterus
Uterine tube
Peritoneal
spill
x
Comu
of uterus
Uterine -cavity
Cannula in vagina
Fig. 11.8:
Uretrushysterosalpingogram
A b d o m e n a n d Pelvis
Foetal legs
Foetal ribs
Foetal vertebrae
Foetal arms
-Foetal skull
175
176
Radiological Anatomy
are the ossification of the essential parts of vertebrae, the first segment of the coccyx,
and the metacarpals and phalanges.
The other information which can be gained is:
Presentation and position of the foetus
Degree of flexion of the foetal head and spine
Viability of foetus
Progress of labour
Diagnosis of multiple pregnancy
Detection of the early foetus
Position of the placenta.
SKULL
RADIOGRAPHIC APPEARANCE
Lateral View (Fig. 12.1)
178
Radiological Anatomy
Pineal body
Coronal suture
External ear
Petrous temporal
Frontal sinus
Anterior clinoid process
Orbit
Pituitary fossa
Lambdoid suture
Transverse sinus
groove
Sphenoidal sinus
Maxillary sinus
Hard palate
179
180
Radiological Anatomy
Coronal suture
Sagittal suture
Lambdoid suture
Frontal sinus
Lesser wing of sphenoid
Greater wing of sphenoid
Petrous temporal
Mandibular condyle
Nasal fossa
Fig. 12.2:
Orbit
Mastoid process and air cells
Maxillary sinus
Skullanteroposterior v i e w
181
This view shows para-nasal air sinuses clearly. Other features of the skull can also
be made out.
Crista galli
Frontal sinus
Ethmoidal sinus
Orbit
Nasal septum
orbital
Greater wing
of sphenoid
Maxillary sinus
Foramen rotundum
Hard palate
Nasal fossa
Mandible
Vertebral Column
RADIOGRAPHIC APPEARANCE
SPECIAL FEATURES
CERVICAL SPINE
Antero-posterior View (Fig. 13.1)
Vertebral Column
M
Mandible
Thyroid cartilage
Vertebral body
Larynx
Intervertebral disc
Transverse process
Transverse
process of C 7
Spinous process
Trachea
First rib
Fig. 13.1: C e r v i c a l s p i n e A P v i e w
183
184
Radiological Anatomy
H Spines and neural arches are obscured by the overlying rib shadows,
y Vertebral bodies of upper thoracic are often obscured by the shoulder girdle.
LUMBAR SPINE
A line drawn along the posterior border of the body of sacrum and the posterior
borders of the bodies of the lumbar vertebrae, may be expected to form an even
curve.
Vertebral Column
Spinous
process
Thyroid cartilage
Vertebral body
- Intervertebral disc
Transverse process
Fig. 13.2: C e r v i c a l spinelateral v i e w
185
186
Radiological Anatomy
Intervertebral disc
Lamina
Vertebral body
Transverse process
Pedicle
Spinous process
Transverse
process
Vertebral
body
Spinous
process
Intervertebral
disc
Pedicle
Vertebral Column
187
Vertebral body
Pedicle
Spinous process
Intervertebral disc
Lamina -
Transverse process
body
Pedicle
Intervertebral disc
Spinous
process
Transverse process
188
Radiological Anatomy
Q Lumbarisation of first sacral segment. When the first sacral segment fails to
fuse, it is termed as the sixth lumbar vertebra.
U Sacralisation of lumbar vertebra. The 5th lumbar vertebra becomes fused partly
or completely with the first sacral segment and then there are only four lumbar
vertebrae.
SACRUM AND C O C C Y X
Antero-posterior View
pSacroiliac joint
- Sacral foramen
-/Coccyx.
Fig. 13.7a:
Angiography
Angiography is a roentgenologic procedure which permits visualisation of the
internal anatomy of the heart and blood vessels including arteries, veins and
lymphatics through the intravascular injection of radiopaque contrast material.
Indications are many and varied.
CONTRAST MEDIA
in
of
to
as
Through aortography one may obtain a visualisation of the entire aortic circulation
and its branches. It is also useful for visualisation of the placenta in the pregnant
uterus. Since there is a pudding of dye in the sinusoidal circulation of the placenta it
is readily visualised and abnormal implantation can be detected.
Its greatest use lies in the demonstration of renal architecture. A wide variety of
pathologic conditions of the kidney such as neoplasms, anomalies, aneurysms and
causes of renal hypertension can be diagnosed.
189
190
Radiological Anatomy
Renal artery
Aorta
Inferior mesenteric artery
Arterial catheter
Lumbar
arteries
Abnormal branch
Fig. 14.1: A o r t o g r a m a b d o m i n a l a o r t a
Angiography | | | 191
Two commonly used techniques of abdominal aortography are:
i. Translumbar aortography. Direct needle puncture of the vessel
The needle is introduced through the skin just below the 12th rib about
5 cm on the left of the midline. It is directed anteriorly, upwards and
medially till it grazes against the lateral surface of the vertebral body. It
is then withdrawn a little and readjusted till the transmitted pulsations
of the aorta are felt. Additional pressure forces it into the lumen, which
is indicated by the gush of blood into the tubing.
By a 10 ml syringe 5 ml of the medium is injected and the position of
the needle is checked by screening or an X-ray, following this 40 ml
medium is injected forcefully by a 50 ml syringe in shortest possible
time.
ii. Retrograde transfemoral aortography (Modified Seldinger's method)
The patient is put in the supine position and the femoral arteries are
felt on both sides. The one with better pulsation is preferred and the
inguinal area is prepared and draped.
A small skin incision is made over the pulsating artery. The artery is
punctured with a Seldinger's needle No. 18 gauge with double lumen
and bevelled edges, till a free blood flow is obtained.
A flexible guide wire is introduced into the arterial lumen and the needle
is withdrawn.
An arterial catheter of Odman's type is slipped down over the guide
wire into the artery and is advanced into the aorta up to the desired
level. Fluoroscopic help is safe and beneficial at this stage.
The guide wire is then removed leaving the catheter in the artery.
Rest of the steps are the same as in the translumbar technique.
The advantage of catheter method over direct needle puncture is that with the
catheter in position the bolus of the dye can be injected at selected levels and the
injection of the dye can be repeated at intervals if necessary.
CEREBRAL ANGIOGRAPHY
Carotid A n g i o g r a p h y
A Cournands needle of 18 gauge is used for puncturing the common carotid artery.
The skin up to the outer carotid wall is punctured with a sharp stylet in position
while the needle is threaded in the artery with a blunt stylet.
The sharp stylet is taken out when the artery gets punctured. The needle is
gradually withdrawn to get a jet of arterial blood through the spout of the
needle.
Posterior circulation
Posterior cerebral
artery
Posterior
communicating
artery
Basilar artery
Superior cerebellar
artery
Anterior inferior
cerebellar artery
Anterior circulation
Anterior cerebral
artery
Anterior
communicating
artery
Middle cerebral
artery
Internal carotid
artery
Carotid siphon
External carotid
artery
Fig. 14.2a: A n t e r o - p o s t e r i o r i n t e r n a l c a r o t i d a n g i o g r a m
The syringe is next filled u p with 10 ml of the contrast medium. The contrast
dye used is Urografin 75% or Conrary 280 or Visotrast 370. The latter two
have approximate concentration of 60%. The dye is injected fairly rapidly
with a considerable force.
The first picture is shot as the last 2 ml of contrast medium is left to be injected.
The next two pictures are taken at IV2 and 2 seconds, after complete injection
of dye respectively.
Both the antero-posterior and lateral projections should be taken whenever
possible, since only then can one consider the visualisation complete in three
dimensions.
It is done to visualise lesions below the tentorium cerebelli. The technique of vertebral
puncture is almost the same through the neck as for the carotid artery puncture
described above.
The needle is held almost vertical (perpendicular) to neck and is inserted u p to
the transverse process of the seventh cervical vertebra.
After the above structure is struck, the needle is withdrawn and inserted with a
slight inclination of 45 or 50.
There is another technique of obtaining a vertebral angiogram, i.e. via right brachial
route.
A percutaneous puncture of right brachial artery is done 3.75 cm above its division
(and about the same distance from the crease of right elbow joint).
The amount of dye used is greater than in carotid angiography. In one view 30 ml
of contrast medium is used in the same concentration as that for carotid angiography.
Posterior inferior
cerebellar artery
Vert
New Imaging
Devices
A new breed of computerized body-scanning devices is changing the face of
medicine. Recent rapid advances in imaging technology or "machine vision"enable
doctors to see inside the body without exploratory operations. The technology of
computer graphics is being harnessed to transform the torrents of "machine vision"
data into meaningful diagnostic displays. As a result more progress has been made
in diagnostic medicine in the past fifteen years than in the entire previous history of
medicine.
1. COMPUTED TOMOGRAPHY (CT) (Figs 15.1 t o 15.8)
The technique was developed in Great Britain in 1972. It employs an X-ray tube on
a yoke that allows 360 degrees rotation. A thin fan-shaped X-ray beam penetrates
the body and produces a cross-sectional view of tissues within. By revolving the Xray tube around the body, CT machines view thin "Slices" of the body from many
angles. Hundreds of crystal chip detectors move in an arc with the X-ray tube. The
detectors on the opposite side of the tube record what the scanner sees and deliver
their information to a digital computer which compares the many views to make a
single three-dimensional video image which is displayed on a screen.
Thus CT scan is a cross-sectional image presented as a matrix of picture elements
or pixels. Each pixel records on a grey scale the X-ray absorption of the corresponding
element in the patient and, since these absorption values vary in a systematic way
from tissue to tissue, this process builds up a picture of the organs and tissues.
CT scan has profound use in lesions of the brain and spinal cord. Though
expensive, it is a non-invasive, quick method to evaluate patients for brain, spinal
cord and vertebral column lesions.
Haematomas, infective lesions of the brain, cerebrovascular accidents whether
due to infarct or haemorrhage can be differentiated easily. Mass whether supratentorial or infratentorial can be better evaluated using plain contrast enhanced
scans. Ventricular system enlargement or diplacement can be easily recognised.
Lesions around the sella turcica and other extra-axial tumours can be confidently
diagnosed.
195
196
Radiological Anatomy
Detector system
Gantry
X-ray tube
Console screen
Key board
In the spinal cord, tumours can be seen using myelogram followed by CT scan.
The lesions of the vertebral column like infections, tumours, congenital abnormalities
in the cranio-vertebral regions, disc prolapse, spondylolisthesis, etc. can be clearly
seen.
In the nasopharynx, oropharynx and larynx it has a significant diagnostic role.
Lesions of the orbit, lymph nodes, thyroid and parathyroid glands, salivary glands
can be seen clearly.
CT images have a number of advantages over conventional chest radiographs,
for example the absence of confusing superimposition of structures and superior
contrast resolution. CT scanning has a limited place in cardiology because the
movements of the heart and the relatively long scanning time make the images too
blurred to be of value. In thorax parenchymal and mediastinal masses can be seen
clearly.
CT scans are valuable to demonstrate focal or diffuse, solid or cystic lesions in
the liver. Masses of the gallbladder and their extension in the liver is better seen.
Lesions in the pancreas can be diagnosed confidently. Lymph node and splenic
enlargements can be clearly seen in properly done studies.
CT scanning has a major role in diseases of the hollow viscera. Barium meal and
endoscopic examinations remain the investigation of choice for the gastro-intestinal
tract. Scanning methods do, however, provide additional valuable information in
certain circumstances.
Since CT scans display anatomy in the axial plane the technique has become
important in the demonstration of urinary tract abnormalities. Radiologically nonopaque calculi (composed of xanthine, uric acid or cystine) have a high density on
New Imaging D e v i c e s
Frontal sinus
Third ventricle
Position of
caudate
nucleus
Ambiens cistern
f}
197
198
Radiological A n a t o m y
Right
brachiocephalic vein
Subclavian artery
Trachea
Oesophagus/common
carotid
Head of humerus
artery
First rib
Scapula
Body of sternum
Ascending aorta
Trachea
Oesophagus
(Tracheal bifurcation)
Descending aorta
Subscapularis
Infraspinatus
muscle
f}
199
Sternum
Pulmonary trunk
Left atrial
appendage
Azygos vein
Left atria
Oesophagus
Serratus anterior
muscle
Aorta (Descending
aorta)
Latissimus dorsi
Azygous vein
2 0 0 m Radiological A n a t o m y
Duodenum
Stomach
Bowel loops
Gallbladder
Inferior vena cava
Liver
Right adrenal
gland
Abdominal aorta
1
1
Left kidney
Right crus of
diaphragm
Spleen
Erector spinae
muscle
Bowel loops
Iliopsoas
muscle
Gluteus
minimus
Gluteus
medius
Piriformis
muscle
Uterus Ilium -
Gluteus
maximum
201
CT scanning and can be distinguished from other caliceal filling defects, such as
blood clots and small tumours.
In the pelvis, urinary bladder, prostate, seminal vesicles, uterus and ovaries can
be imaged and their lesions detected.
202
Radiological A n a t o m y
Frontal lobe
Corpus collosum
Occipital lobe
Pons
Sphenoidal sinus
Fourth ventricle
Cerebellum
Medulla oblongata
Soft palate
Tongue
C-, vertebra
Spinal cord
Fig. 15.9: Midline sagittal magnetic resonance image (MRI) of normal brain
Vertebral body
Intervertebral
disc
Thecal sac
Spinous process
Sacrum
Fig. 15.10: Midline sagittal magnetic resonance image (MRI) of normal spinal cord
N02M
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Fig. 15.11: USG through gall bladder GB (Gallbladder), CBD (Common bile duct), PV
(Portal vein)
PANCREAS
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Fig. 15.12: USG through pancreas ST (Stomach), NP (Neck of pancreas), BP (boay of pancreas),
HP (heaa of pancreas), CBD (common bile duct), PV (Portal vein), SMA (Superior mesenteric
artery), TP (Tail of pancreas)
Solid and cystic structures transmit sound waves in straight lines, and reflect
them from interfaces. Gas filled structures dissipate the ultrasonic beam, and
therefore the liver, gallbladder and solid or cystic tumours in the abdomen can be
depicted by abdominal ultrasound. Structures which reflect ultrasound appear bright
(hyperechoic), w h e r e a s s t r u c t u r e s w h i c h t r a n s m i t u l t r a s o u n d a p p e a r dark
(hypoechoic).
204
Radiological Anatomy
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205
The viability and growth of the foetus are monitored periodically by ultrasound. In
case of infertility it is useful for timing the follicular maturation which helps in
m a n y ways. U l t r a s o u n d has useful applications for diseases of thyroid and
parathyroids, breast, neonatal head, orbit and scrotum.
Ultrasonography of heart is known as Echocardiography. Two echocardiographic
methods are in use at the present time, the M-Mode and the cross-sectional, otherwise
k n o w n as 'real time' or two dimensional. The M-Mode records the echoes of
structures along a single linear beam emanating from a transducer placed on the
precordium. From this the movement of the right and left ventricular cavity and
wall thickness can be measured as well as the movement of the mitral, aortic and
tricuspid valves. The pulmonary valve is less readily echoed. Echocardiography is
one of the certain ways of diagnosing prolapsed mitral cusps. In cross-sectional
echocardiography the images obtained from the two-dimensional echo are dynamic
so that movement of the ventricles can be seen directly, as well as the functioning of
the valves.
Echocardiography has a very important place in congenital heart disease. The
interatrial and interventricular septa are relatively easy to visualise and the presence
of a defect in either of these can almost always be seen if they are of a size which is
clinically significant.
4. DIGITAL SUBTRACTION ANGIOGRAPHY (DSA)
It is an imaging technique that produces clean clear views of flowing blood or its
blockage by narrowed vessels. DSA depends on the injection into the vessels of a
contrast agent containing iodine that is opaque to X-rays. The shadow, this opacity
creats allow doctors to see the flow of blood. Before injection of the contrast substance,
an X-ray image is made and stored in a computer. After injection a second image is
made highlighting the flowing blood as revealed by the substance. The computer
then substracts image one from image two, leaving a sharp picture of blood vessels
such as the coronary arteries. It is thus a method for computerised enchancement of
the images obtained at angiography.
5. RADIO-ISOTOPE IMAGING (PET/SPECT)
Index
Acetabulum 97, 123
Acromion 91
tip of 6
Angiography 204, 205
aortic 205
carotid 193, 194
cerebral 203
digital subtraction 203
vertebral 194-196
Angle 6
acromial 6
cardiophrenic 136, 138
inferior, of scapula 7, 38, 91, 136, 139, 146
infrasternal 42
sternal 6, 42
Aorta 39, 52, 53
Aortography 189, 191
Appendix 49, 58
Arch 184
anterior, of atlas 83
deep palmar 21
neural 184
of cricoid 73, 76
superficial palmar 21
Areas, cortical 83
auditary 65, 68, 73
brocas 83
motor 71, 83, 84
sensory 84
visual 84
Arteries 21, 26, 31
anterior tibial 31
aorta 52, 53
abdominal 52
arch of 37
ascending 37
descending thoracic 38
axillary 12
brachial 10,11
brachialcephalic 44
coeliac 53
common carotid 38, 73, 79
common iliac 55
deep palmar arch 21
dorsalis pedis 33
external carotid 79
external iliac 53, 55
facial 69, 72
femoral 24-27
hepatic 53, 59
inferior epigastric 54
inferior gluteal 26
inferior mesenteric 54
internal carotid 79
internal thoracic 39
lateral plantar 33
left gastric 54
median plane 39
middle meningeal 71
popliteal 27-31
posterior tibial 31, 32
radial 15, 16
renal 54
splenic 53, 59
subclavian 39, 79, 80
superficial palmar arch 21
superior gluteal 26
superior mesenteric 54
ulnar 11, 14, 16
Asterion 73
Atrium 143
left 143
right 143
Axillary fold, anterior 5
Biliary apparatus 59
Bladder 51,61
gall 51,61
urinary 18
Bones (also see individual) 103
sesamoid 103
supernumerary 103
Borders 35
anterior, of tibia 35
of brain 89
of heart 36
of liver 51
Box, Anatomical snuff 15-17
Bowel 164
large, radiology of 171
small, radiology of 171
Breast 7, 138
Bregma 65
Brocas area 83
Bronchogram 145, 148-150
anterior 156
lateral 150, 152, 154
Bronchography 145
technique 145
207
208
Index
Hamate, hook of 13, 17
Head of 97
femur 97
fibula 27, 28, 30, 99
humerus 91
metacarpals 96
radius 93, 94
Heart 36,41
apex beat of 36
borders of 35, 42, 184
orifices of 41
shadow of 138, 141
sternocostal surface of 42
Hilar region 138
Hilar shadows 138
Humerus 91
capitulum of 93, 94
epicondyles of 94
fossae of 93
head of 91, 93
neck of, anatomical 97
ridges of, supracondylar 94
trochlea of 93
tuberosities of 5, 103, 105
Hyoid, body of 72
Hysterosalpingogram 173
Hysterosalpingography 173
Inguinal ligament 24
Inion 73
Intestine, mesentery of small 58
Isthmus of thyroid 73
Joint 33,90
acromioclavicular 90
calcaneocuboid 33
elbow 8,93
hip 23, 96,98
intertarsal 102
knee 28, 30, 105
metacarpophalangeal 19
metatarsophalangeal 33
mid-tarsal 33
radio-carpal 96
sacroiliac 155, 171
shoulder 9
talonavicular 33
tarsometatarsal 33
wrist 19, 20
xiphisternal 38
Kidneys 61
anterior aspect 62
posterior aspect 62
radiographic appearance 136, 153, 155
Lambda 65, 71
Laminae 182
Landmarks 3
palpable 3
visible 3
Laryngeal prominence 73, 74
Ligament, inguinal 23
midpoint of 23
Line 23
Nelaton's 23
Reid's base 66
Shenton's 99
spinotrochanteric 26
Linea 49
alba 49
semilunaris 49, 59
Liver 50, 60
Lumbarisation 188
Lungs 42-45
apex of 38
borders 42, 43, 45
bronchi of, right 54, 158, 161
bronchi of left 54, 159, 161
fields of 136, 138, 139, 141
fissures of 43, 44
lobes of 43
root of 45
Magenblase 155
Magnetic resonance imaging 201
Malleolus 26
lateral 26
medial 26
Margin 36,37
subcostal 36, 37
Mastoid 177, 179
air cells 177, 179
process 177, 179, 184
Meatus, auditary 177
Mesentery of small intestine 58
Mesocolon, pelvic 58
Metacarpals 96, 107
Metatarsals 103, 107
Muscles 4, 14, 37
biceps brachii 6
deltoid 4
diaphragm 141, 143, 148, 155
flexor carpiradialis 13, 14, 16, 17
flexor carpiulnaris 13, 16-18
palmaris longus 18
pectoralis major 5
psoas 155
scalenus anterior 75
sternomastoid 75-77, 79, 80
triceps 7
Nasion 65, 69, 71
Navicular 102, 103
Neck, median line of 73
209
210
Nerve 75
accessory 77
anterior cutaneous, of neck 75
axillary 9
common peroneal 27, 28
deep peroneal 28
facial 69
femoral 24, 25
glossopharyngeal 77
great auricular 76
hypoglossal 77
inferior alveolar 69
infra-orbital 70
lateral plantar 33
lesser occipital 76
lingual 69
mandibular 69
maxillary 70
medial plantar 33
median 9, 14
musculocutaneous 10
phrenic 76
posterior interosseous 15
radial 10
sciatic 24
superficial peroneal 29
supraclavicular 86
tibial 29,30
ulnar 16
vagus 78
Nipple 36,37
Notch 70, 73, 100
intercondylar, of femur 100
supra-orbital 67, 70
suprasternal 37
Occipital prostuberance, external 64
Odontoid process 184
Oesophageogram 148, 151
Oesophagus 47, 148, 152
Olecranon 93,94
apex 7
posterior surface 7
Opening 23, 26
saphenous 23, 26
of vermiform appendix 58
Orifice 41
aortic, of heart 41
ileocolic 58
mitral, of heart 41
pulmonary, of heart 41
tricuspid of heart 41
Orbit 178, 179
Ossification, sequence of 128
at ankle 128
at elbow 111
at
at
at
at
at
at
foot 128
hand 115
hip 119
knee 124
shoulder 108
wrist 115
Index
Radiographic appearances 135
abdomen 153
ankle 101,103
appendix 164
biliary tract 164
bronchogram 145, 148-150
chest 136, 138, 139, 145, 152
cholecystogram 166, 167
colon 164
coccyx 153, 176, 188
duodenum 156, 158, 160
elbow 93,94
foot 102, 103
genital tract, female 173
hand 95
hip 96
hysterosalpingogram 173, 174
ileum 162, 163
jejunum 163
knee 99, 100, 105
oesophageogram 148, 151
pelvis, female 172
pyelogram 169-172
sacrum 184, 188
shoulder 91,92
skeleton 89,90
skull 177, 178, 181
stomach 156, 158-162
thorax 138, 140, 142, 144
urinary tract 169
vertebral column 182, 195, 196
wrist 95
Radiograph 88
standard views 88
types 89
Radio-isotope 205
imaging 205
Radius 13
dorsal tubercle of 13
head of 7, 104
lower end of 14
styloid process of 14, 96
tuberosity 93
Rectum 164
Retinaculum 20
extensor, of hand 20
flexor, of hand 20
flexor, of foot 32
inferior extensor 35
superior extensor 35
Ribs 37,139
Root of 45
lungs 45
mesentery of small intestine 58
Sacralisation 187
Scaphoid, tubercle of 14
211
212
Tibia 27
condyles of 27
intercondylar eminence of 100
lower end of 101, 104
malleolus of 27, 29
medial surface of 27
Tip of acromion 6
Thyroid 74-76, 79
Trachea 48, 73
first ring of 73
Tract 155, 164, 169, 173
biliary 164
gastrointestinal 155
genital, female 173
urinary 169
Trapezium, crest of 13, 19
Triangle 21, 143
aortic 143
Bryant's 21
Trochanter of femur 23
greater 23, 25, 97, 99
lesser 97
Trunk 39, 143, 199
pulmonary 39, 40, 143, 199
sympathetic 78
Tube uterine 173
Tubercle 13, 14, 22
adductor 22
base 5th metatarsal 32
carotid 73
conoid 90
dorsal, of radius 13, 15
of iliac crest 49
of scaphoid 13, 14
peroneal 31
pubic 50, 52, 53
tibial 29
Tuberosity 32
greater, of humerus 6, 92
lesser, of humerus 6
of ischium 23
of navicular 32, 33
of radius 93
Ulna 93,96
coronoid process 93
head of 10
olecranon process of 93
posterior border of 14
styloid process of 14, 96, 99
Ultrasonography 200
Umbilicus 49-53
Ureters 62,63
pelvis of 171, 173
Urinary tract 169
Uterus 173, 175
Vein 72,80
anterior facial 72
axillary 12
basilic 12
brachiocephalic left 40
brachiocephalic right 40
cephalic 11
common iliac 53, 55
external iliac 53, 55
external jugular 80
femoral 27
internal jugular 80
long sphenous 27
Vena cava 41, 55
inferior 55
superior 41
Vertebra, bodies 181, 184
Window 143
aortic 143
prevertebral 141
Xiphisternum 38
X-rays 87
position of 87
properties of 88
Surface and
Radiological
ANATOMY
Third Edition
A. Halim
is former Professor and Head, Department of Anatomy, King George's Medical College, Lucknow.
Prof Halim completed his graduation and postgraduation at King George's Medical College with
honors in anatomy, pharmacology and pathology. He was awarded "The Best Student of Anatomy"
gold medal during his preclinical years and later on had a brilliant academic record. He taught anatomy
with equal distinction for 38 years to undergraduate, postgraduate and dental students in his alma
mater.
Prof Halim attended W H O sponsored National Course on Educational Science at JIPMER,
Pondicherry, and was awarded W H O fellowship to attend a Course on Medical Education at the
Centre for Medical Education, University of Dundee, Scotland and UK. He visited the medical
schools at Dundee, Edinborough, St. Adrews, London, Nottingham and Southampton to apprise
himself of the new trends in the teaching of anatomy. He is Fellow of the British Association of
Clinical Anatomists, Fellow of the International Medical Sciences Academy, and a member of the
Academic Council of CSM Medical University (previously King George's Medical University),
Lucknow.
Apart from this book, Prof Halim has written several books, viz. Human Anatomy: Regional and
Clinical for MBBS students, Anatomy of Head and Neck for BDS students, Anatomy of Female Pelvis
and Breast for students of obstetrics and gynecology and Textbook of Human Histology. These are
being widely prescribed in medical and dental colleges in India.
ISBN : 978-81-239-1952-2
CBS
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