CN104257378A - Volume blood flow pulse imaging system - Google Patents
Volume blood flow pulse imaging system Download PDFInfo
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- CN104257378A CN104257378A CN201410440383.4A CN201410440383A CN104257378A CN 104257378 A CN104257378 A CN 104257378A CN 201410440383 A CN201410440383 A CN 201410440383A CN 104257378 A CN104257378 A CN 104257378A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 46
- 230000017531 blood circulation Effects 0.000 title claims abstract description 32
- 238000005286 illumination Methods 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 10
- 239000004065 semiconductor Substances 0.000 claims description 9
- 230000006978 adaptation Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000036772 blood pressure Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 210000003491 skin Anatomy 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/026—Measuring blood flow
- A61B5/0295—Measuring blood flow using plethysmography, i.e. measuring the variations in the volume of a body part as modified by the circulation of blood therethrough, e.g. impedance plethysmography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0062—Arrangements for scanning
- A61B5/0064—Body surface scanning
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/026—Measuring blood flow
- A61B5/0261—Measuring blood flow using optical means, e.g. infrared light
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Hematology (AREA)
- Cardiology (AREA)
- Physiology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
A volume blood flow pulse imaging system comprises a processor device, a photographic device and a self-adaptive lighting device. The self-adaptive lighting device and the photographic device are electrically connected with the processor device. The photographic device is used for imaging a part to be detected and transmitting obtained image data to the processor device. The processor device receives the image data and analyzes and processes the image data to obtain the working brightness of the photographic device during imaging. When the working brightness is lower than a reference brightness value preset by the processor device, the processor device generates compensation brightness according to the difference between the reference brightness value and the working brightness and feeds back the compensation brightness to the self-adaptive lighting device. The self-adaptive lighting device adjusts the illuminating brightness according to the compensation brightness so that the working brightness of the photographic device can be matched with the reference brightness value.
Description
Technical field
The present invention relates to medical imaging field, particularly relate to a kind of volumetric blood flow pulse imaging system.
Background technology
It is one of important method of assessment physiological health that physiologic information detects, thus work out fast, accurately physiologic information detection method have great importance.Utilizing the imaging of volumetric blood flow pulse to carry out, physiologic information detects is one of current research direction, its principle is the transmission on light and the impact of reflection according to blood constituent in blood vessel and volume change, by obtaining the skin volumetric blood flow sphygmogram picture of epidermis, through signal processing and extraction, to obtain corresponding physiologic information, as pulse frequency, blood flow rate, blood pressure etc.
Because the imaging of volumetric blood flow pulse carries out imaging by common camera, and photographic head does not need to enter in health body when imaging, and can real-time imaging be carried out continuously, detect physiologic information by this mode contactless continuously, physiologic information can be made to detect and become more convenient.Therefore, volumetric blood flow pulse imaging technique has important practical significance for popularizing of portable medical.
But, the existing accuracy rate utilizing the volumetric blood flow pulse imaging system of common camera imaging to carry out physiologic information detection depends on the light intensity of environment, when environmental light intensity is moderate, the signal to noise ratio change of volumetric blood flow pulse imaging is not obvious, thus can obtain higher Detection accuracy; But when environmental light intensity too strong or too weak time, the error rate detected can be caused to increase, can not meet on a large scale, the instructions for use of multi-environment.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of volumetric blood flow pulse imaging system, it is by design self-adapting illumination device, realize the object of auto-compensation environment illumination intensity, improve the Detection accuracy of volumetric blood flow pulse imaging system when light intensity is more weak or light intensity is unstable.
The invention provides a kind of volumetric blood flow pulse imaging system, comprise processor device, camera head and self-adapting illumination device, described self-adapting illumination device and described camera head and described processor device are electrically connected, described camera head is treated detection position and is carried out imaging, and the image data transmission extremely described processor device that will obtain, described processor device receives described view data, and analyzing and processing is carried out to obtain operating brightness during described camera head imaging to described view data, when the reference brightness value that described operating brightness is preset lower than described processor device, described processor device generates a compensate for brightness according to the difference of described reference brightness value and described operating brightness, and described compensate for brightness is fed back to described self-adapting illumination device, described self-adapting illumination device regulates brightness of illumination according to described compensate for brightness, match to make the operating brightness of described camera head and described reference brightness value.
Wherein, described self-adapting illumination device comprises fixture and some light sources, and described fixture is provided with some installing holes, and described light source is installed in described installing hole.
Wherein, described fixture is annular, and described some installing holes are arranged in annular, thus described light source forms a circle, to ensure uniform irradiation.
Wherein, described self-adapting illumination device also comprises driving device, described driving device is arranged in described fixture, and be electrically connected with described light source and described processor device, the compensate for brightness that described driving device sends according to described processor device, generate the drive current with described compensate for brightness adaptation, send adaptive brightness to drive described light source.
Wherein, described camera head is arranged at the center of the circle that described light source surrounds.
Wherein, described installing hole is arranged in square, rectangle or triangle, thus described light source surrounds a square, rectangle or triangle, and described camera head is arranged at square that described light source surrounds, rectangle or leg-of-mutton center.
Wherein, described light source is electric filament lamp or the combination with the semiconductor light-emitting-diode of specific wavelength or the semiconductor light-emitting-diode of different wave length.
Wherein, described processor device arranges one and presets signal to noise ratio, and described reference brightness value is brightness when meeting default signal to noise ratio of view data that described camera head generates.
Wherein, described camera head is CMOS, NMOS or CCD.
Wherein, when described operating brightness is more than or equal to described reference brightness value, described processor device does not generate described compensate for brightness, and then described self-adapting illumination device does not start.
The volumetric blood flow pulse imaging system that the embodiment of the present invention provides, by adding a self-adapting illumination device, regulate brightness during described camera head imaging, this camera head is made to carry out imaging under one preferably brightness of illumination, thus improve the physiologic information detection accuracy of described volumetric blood flow pulse imaging system when light intensity is not enough or light intensity is unstable, ensure that the accuracy rate that physiologic information detects.In addition, volumetric blood flow pulse imaging system provided by the invention has easy and simple to handle, and low cost and other advantages, meets the instructions for use under different external environment.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the module diagram of the volumetric blood flow pulse imaging system that the embodiment of the present invention provides.
Fig. 2 is the mounting structure schematic diagram of described camera head and described self-adapting illumination device.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, the embodiment of the present invention provides a kind of volumetric blood flow pulse imaging system 100, for obtaining the volumetric blood flow sphygmogram picture at position to be detected (as skin), and by carrying out analyzing to described volumetric blood flow sphygmogram picture and extracting, to obtain corresponding physiologic information, as, the physiologic informations such as pulse frequency, blood flow rate, blood pressure.
Described volumetric blood flow pulse imaging system 100 comprises processor device 10, camera head 20 and self-adapting illumination device 30, described camera head 20 and described self-adapting illumination device 30 are all electrically connected with described processor device 10, described self-adapting illumination device 30 has different brightness of illuminations, and described brightness of illumination carries out regulating and controlling by described processor device 10.Described camera head 20 carries out imaging to described position to be detected, and image data transmission imaging obtained is to described processor device 10, described processor device 10 receives described view data, and the operating brightness (brightness of external environment condition) during by carrying out image processing and analysis to described view data and then obtaining described camera head 20 imaging, described processor device 10 presets a reference brightness value, when described operating brightness is lower than described reference brightness value, described processor device 10 generates a compensate for brightness (when described operating brightness is more than or equal to described reference brightness value according to the difference of described operating brightness and described reference brightness value, described self-adapting illumination device 30 does not start), and described compensate for brightness is fed back to described self-adapting illumination device 30, described self-adapting illumination device 30 sends the light of respective strengths automatically according to described compensate for brightness, with make the operating brightness of described camera head 20 close to or equal described reference brightness value (namely the operating brightness of described camera head 20 and this reference brightness value match), thus described camera head 20 carries out the imaging of volumetric blood flow pulse under the lighting condition of reference brightness value, improve the accuracy of physiologic information testing result.
In embodiments of the present invention, described processor device 10 can be computer or Single Chip Microcomputer (SCM) system, itself and described camera head 20 and described self-adapting illumination device 30 are electrically connected, and for receiving the view data that described camera head 20 obtains and the signal feeding back described compensate for brightness to described self-adapting illumination device 30, to regulate the brightness of illumination of this self-adapting illumination device 30.Be specially, described processor device 10 carries out image procossing and analysis by the view data transmitted described camera head 20, and then obtain the real-time operating brightness of described camera head 20, and according to the luminance difference between the reference brightness value preset and real-time operating brightness, generate described compensate for brightness.It should be noted that, when described real-time operating brightness is higher than described reference brightness value, described processor device 30 does not generate described compensate for brightness.
Wherein, described reference brightness value obtains by following method: described camera head 20 obtains the view data of the irradiation environment in different brightness; Described processor device 10 calculates the signal to noise ratio of the view data that described camera head 20 obtains under the irradiation environment of different brightness; And brightness when meeting default signal to noise ratio is set to reference brightness value by this processor device 10.
See also Fig. 2, in embodiments of the present invention, described self-adapting illumination device 30 comprises fixture 31 and multiple light source 32, and described fixture 31 can be annular, it offers some installing holes for fixing described light source 32 (figure does not mark).Wherein, described some installing holes can be arranged in annular, thus described light source 32 forms a circle, and described camera head 20 is arranged at the centre of described self-adapting illumination device 30, are namely roughly positioned at the center of the circle that described light source 32 surrounds.Preferably, described some installing holes are equally spaced opened on described fixture 31, and be arranged in circular, described camera head 20 is arranged at the centre of described self-adapting illumination device 30, namely the center of the circle that described multiple light source 32 surrounds roughly is positioned at, to ensure that described position to be detected by described light source 32 uniform irradiation, thus can obtain preferably illumination and imaging effect.
Be understandable that, in other embodiments of the invention, described fixture 31 also can be set to other shapes, as can rectangle be arranged to, square, triangle, other polygons, or irregular shape, described installing hole also can be arranged in rectangle, square, triangle, arbitrary polygon, or other irregular shapes, described camera head 20 is arranged at the rectangle that described light source 32 surrounds, square, triangle, arbitrary polygon, or the center of other irregular shapes, as long as ensure that described detection site can by the structural design of light source 32 uniform irradiation of described self-adapting illumination device 30 all within protection scope of the present invention, do not repeat them here.
In embodiments of the present invention, described self-adapting illumination device 30 also comprises driving device 33, and described driving device 33 is electrically connected with described processor device 10 and described multiple light sources 32.It is inner that described driving device 33 can be installed on described fixture 31, and be electrically connected with each light source 32, to provide drive current to each light source 32, and then adjusts the brightness of illumination of each light source 32.Described processor device 10 feeds back described compensate for brightness to described driving device 33, described driving device 33 produces adaptive drive current according to described compensate for brightness, and drive described light source 32 to send the light of the adaptive brightness of illumination with described drive current, thus make the operating brightness of described camera head 20 close to or equal described reference brightness value.
It should be noted that, in embodiments of the present invention, described light source 32 can select dissimilar light source according to the actual needs, as can be electric filament lamp, or be the combination of the semiconductor light-emitting-diode (Light Emitting Diode, LED) with specific wavelength or the LED with different wave length.Wherein, can selecting according to the physiological feature at described position to be detected and form of the wavelength of described LED, the present invention is not specifically limited this.
It should be noted that, in embodiments of the present invention, described camera head 20 can be but be not limited to: charge coupled cell (Charge-coupled Device, CCD), complementary metal oxide semiconductors (CMOS) (Complementary Metal Oxide Semiconductor, or N-type metal-oxide semiconductor (MOS) (N Mental Oxide Semiconductor CMOS), NMOS), its image-forming principle can be electronic imaging, optical imagery or imaging fiber etc.
See also Fig. 1 and Fig. 2, before using, the signal to noise ratio of the view data that described processor device 10 is obtained at different brightnesses by the described camera head 20 of calculating, and the brightness scale meeting described default signal to noise ratio is designated as reference brightness value, and preserve described reference brightness value.During use, described camera head 20 is aimed at described position to be detected, as the position such as skin of human body, now, described self adaptation illuminator 30 is in closed condition, described camera head 20 is under the illuminate condition of natural light (or indoor light), detect position to described band to take, and by image data transmission to described processor device 10, described processor device 10 calculates according to described view data and obtains the current operating brightness brightness of natural light or indoor light (namely under current environment).Wherein, the acquisition of described operating brightness is that sampled point calculates by getting scene center point, also can adopt in scene, to get multiple spot do sampled point and calculate.Then, described processor device 10 judges whether described operating brightness is less than described reference brightness value, if, then described processor device 10 is according to the difference of described operating brightness and described reference brightness value, calculate generation one compensate for brightness (when described operating brightness is more than or equal to described reference brightness value, then described processor device 10 does not generate compensate for brightness), and described compensate for brightness is transferred to described self adaptation illuminator 30.The driving device 33 of described self adaptation illuminator 30 is according to described compensate for brightness, generate the drive current with described compensate for brightness adaptation, described drive current drives described light source 32 to emit beam, with make the operating brightness of described camera head 20 close to or equal described reference brightness value.Now, described camera head 20 carries out imaging to described position to be detected under the lighting condition of reference brightness value, obtain the view data of described volumetric blood flow sphygmogram picture, and utilize described processor device 10 to carry out signal processing and extraction to described volumetric blood flow sphygmogram picture, the physiologic information at described position to be detected can be obtained, as pulse frequency, blood flow rate, blood pressure etc., thus achieve physiological detection.Under described camera head 20 is in reference brightness value when imaging, thus ensure that the accuracy of physiologic information testing result.
In sum, the volumetric blood flow pulse imaging system 100 that the embodiment of the present invention provides, by adding a self-adapting illumination device 30, regulate brightness during described camera head 20 imaging, this camera head 20 is made to carry out imaging under one preferably brightness of illumination, thus improve the physiologic information detection accuracy of described volumetric blood flow pulse imaging system 100 when light intensity is not enough or light intensity is unstable, ensure that the accuracy rate that physiologic information detects.In addition, volumetric blood flow pulse imaging system 100 provided by the invention has easy and simple to handle, and low cost and other advantages, meets the instructions for use under different external environment.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a volumetric blood flow pulse imaging system, comprise processor device and camera head, it is characterized in that, described volumetric blood flow pulse imaging system also comprises self-adapting illumination device, described self-adapting illumination device and described camera head and described processor device are electrically connected, described camera head is treated detection position and is carried out imaging, and the image data transmission extremely described processor device that will obtain, described processor device receives described view data, and analyzing and processing is carried out to obtain operating brightness during described camera head imaging to described view data, when the reference brightness value that described operating brightness is preset lower than described processor device, described processor device generates a compensate for brightness according to the difference of described reference brightness value and described operating brightness, and described compensate for brightness is fed back to described self-adapting illumination device, described self-adapting illumination device regulates brightness of illumination according to described compensate for brightness, match to make the operating brightness of described camera head and described reference brightness value.
2. system according to claim 1, is characterized in that, described self-adapting illumination device comprises fixture and some light sources, and described fixture is provided with some installing holes, and described light source is installed in described installing hole.
3. system according to claim 2, is characterized in that, described fixture is annular, and described some installing holes are arranged in annular, thus described light source forms a circle, to ensure uniform irradiation.
4. system according to claim 3, it is characterized in that, described self-adapting illumination device also comprises driving device, described driving device is arranged in described fixture, and be electrically connected with described light source and described processor device, the compensate for brightness that described driving device sends according to described processor device, generates the drive current with described compensate for brightness adaptation, sends adaptive brightness to drive described light source.
5. system according to claim 3, is characterized in that, described camera head is arranged at the center of the circle that described light source surrounds.
6. system according to claim 3, it is characterized in that, described installing hole is arranged in square, rectangle or triangle, thus described light source surrounds a square, rectangle or triangle, and described camera head is arranged at square that described light source surrounds, rectangle or leg-of-mutton center.
7. system according to claim 3, is characterized in that, described light source is electric filament lamp or the combination with the semiconductor light-emitting-diode of specific wavelength or the semiconductor light-emitting-diode of different wave length.
8. system according to claim 1, is characterized in that, described processor device arranges one and presets signal to noise ratio, and described reference brightness value is brightness when meeting default signal to noise ratio of view data that described camera head generates.
9. system according to claim 1, is characterized in that, described camera head is CMOS, NMOS or CCD.
10. system according to claim 1, is characterized in that, when described operating brightness is more than or equal to described reference brightness value, described processor device does not generate described compensate for brightness, and then described self-adapting illumination device does not start.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410440383.4A CN104257378B (en) | 2014-09-01 | 2014-09-01 | Volumetric blood flow pulse imaging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410440383.4A CN104257378B (en) | 2014-09-01 | 2014-09-01 | Volumetric blood flow pulse imaging system |
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| CN104257378A true CN104257378A (en) | 2015-01-07 |
| CN104257378B CN104257378B (en) | 2018-11-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107222687A (en) * | 2016-03-21 | 2017-09-29 | 联想(北京)有限公司 | Electronic equipment and its control method and control device |
| CN107260155A (en) * | 2016-04-07 | 2017-10-20 | 动心医电股份有限公司 | Detect the method and its device of velocity of blood flow |
| CN107405092A (en) * | 2015-03-13 | 2017-11-28 | 皇家飞利浦有限公司 | Photoplethysmo graph device |
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| CN107260155A (en) * | 2016-04-07 | 2017-10-20 | 动心医电股份有限公司 | Detect the method and its device of velocity of blood flow |
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| Publication number | Publication date |
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| CN104257378B (en) | 2018-11-06 |
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