KR20090080157A - Patient position verification device for radiation surgery - Google Patents

Abstract

The present invention relates to an apparatus for verifying a patient position for radiation surgery, and more particularly, by installing a frame on an upper side of a treatment table of radiation equipment, and installing a distance measuring means for measuring a distance between the frame and the patient on the frame. The present invention relates to a patient position verification device for radiosurgery, which enables the patient's position on the treatment table of the equipment to be more quickly and accurately.

Accordingly, the present invention is installed on the upper side of the treatment table (5) of the radiation equipment in the patient position verification apparatus for radiation surgery to verify the position of the patient on the treatment table (5), so as to be seated on the upper side of the treatment table (5) A pair of side plates 20 which are installed and spaced apart at regular intervals on both sides of the patient, and the upper plate 30 which is connected to the upper end of the pair of side plates 20 and spaced at regular intervals to the upper side of the patient Frame 10; Is installed on the frame 10 is characterized in that it comprises a distance measuring means 40 for measuring the distance between the frame 10 and the patient.

Description

Patient positioning verification tool for radiosurgery {Patient positioning verification tool for radiosurgery}

The present invention relates to an apparatus for verifying a patient position for radiation surgery, and more particularly, by installing a frame on an upper side of a treatment table of radiation equipment, and installing a distance measuring means for measuring a distance between the frame and the patient on the frame. The present invention relates to a patient position verification device for radiosurgery, which enables the patient's position on the treatment table of the equipment to be more quickly and accurately.

In general, medical radiation can be divided into therapeutic radiation and diagnostic radiation.

Therapeutic radiation is applied to cancer patients' tumors to prevent them from propagating anymore so that the cancer cells die at the end of their life or to alleviate the patient's pain.

Such radiation therapy can be used to prevent recurrence, for example, in cases where cancer cells are more likely to remain after surgery, or when surgery is not possible, or when radiation therapy is more effective than surgery, or a combination of surgery and radiation therapy This is done to improve the quality of life of the patient or to maximize the anticancer effect after chemotherapy.

On the other hand, the diagnostic radiation is used to determine the size or location of the tumor in the patient's body, and helps to analyze the contents of the patient's area of interest with radiation of weaker energy than the therapeutic radiation, and to analyze the contents and establish a detailed treatment plan.

Radiotherapy, on the other hand, usually depends on the condition of the tumor, but usually lasts for several weeks. In most cases the size of the tumor decreases to some extent during the treatment period. In addition, in the case of radiosurgery, which is similar to radiation therapy but is different in biological biology, that is, it is difficult to access surgical procedures due to anatomical location, or one or several times after the removal of some lesions. In recent years, radiosurgery has been performed in clinical practice to irradiate high doses of radiation and necrosis the lesions.

Here, in order to increase the cancer cure rate through radiation treatment, the area must be continuously photographed to observe the tumor's size or state of interest and then the necessary measures must be taken.

As described above, radiotherapy or radiosurgery often proceeds several times without being completed at one time, so that the normal area around the tumor is not exposed to radiation by irradiating the radiation with the correct energy at the correct location. In particular, spinal radiosurgery requires irradiation of the correct energy at a more accurate location and range to prevent paralysis of the spinal nerve in the treatment of intrathecal tumors.

To this end, treatment planning to prescribe accurate radiation by identifying the size or location of the tumor in advance is preceded.

The treatment plan also includes marking the site of radiation on the patient's body. This display process is based on the image taken by the imaging device such as CT or MRI.

After completing the treatment plan, the patient is usually placed on the treatment table of the radiation equipment for a few days or weeks, and then radiation is irradiated to the corresponding tumor site to perform the actual treatment. At this time, it is a matter of course that the indication displayed on the patient's body is used as a reference for the irradiation direction.

On the other hand, in the case of spinal radiosurgery, if an error occurs in the radiation irradiation position, radiation energy paralyzes the spinal nerve and thus requires very precision. Accordingly, as shown in FIG. 1, the position of the patient's body to which radiation is to be administered during the treatment plan is marked on the patient's body, and the position where the plurality of infrared reflecting beads are attached to the patient's body is indicated on the body of the patient ( marking).

Here, the plurality of infrared reflecting beads are arranged in a predetermined form around the patient's lesion position, and after the reflecting beads are attached to the patient's body, the positions of the plurality of reflecting beads are photographed by an imaging device such as CT or MRI. do.

The image of the reflective beads photographed above is input to a known lesion tracking device (not shown) to establish a treatment plan.

After completing the treatment plan, the patient is placed back on the treatment table of the radiation equipment and a plurality of reflection beads are attached again at the position of the reflection beads marked on the patient's body. Thereafter, the positions of the plurality of reflective beads attached to the patient's body are detected in real time using infrared rays, and the positions of the reflective beads detected through the infrared rays and the images previously input to the lesion tracking device in the treatment planning step. Overlap the positions of the reflecting beads as indicated in.

At this time, by adjusting the position (position) of the patient lying on the treatment table of the radiation equipment to match the position of the plurality of reflective beads attached to the patient's body exactly with the position of the reflective ball of the image input to the lesion tracking device treatment At the planning stage, the patient's position (posture) and the patient's position (posture) lying on the treatment table of the actual radiation equipment can be precisely matched.

If the position of the patient in the treatment planning stage and the position of the patient lying on the treatment table of the radiation equipment for the actual radiation surgery are different, an error occurs at the actual position of the patient and the position to irradiate the spinal nerve and paralyzes the spinal nerve. Can be.

On the other hand, the patient is breathing during the treatment by irradiating the radiation, and when the patient moves due to the patient's breathing or other reasons, the position of the reflective beads attached to the body of the patient is also moved. Here, since the position of the reflecting beads attached to the patient's body is sensed in real time by infrared rays, if the position of the reflecting beads attached to the patient's body is an error range in the position of the reflecting beads of the image input to the lesion tracking device Once outside, the focal tracker displays a warning to immediately discontinue radiation treatment. Of course, radiation treatment resumes after the patient's position (posture) is corrected again.

In addition, since such radiotherapy is usually performed several times, it is important to position the patient at the same position as the first treatment position, and thus, the body of the patient to position the patient at the same position as the first treatment position. A method of exactly matching the position of the plurality of reflection beads attached to the position of the reflection beads of the image input to the lesion tracking device is used.

However, conventionally, time is required to adjust the position (posture) of the patient on the treatment table of the radiation equipment to precisely match the position of the plurality of reflective beads attached to the patient's body with the position of the reflective ball of the image input to the lesion tracking device. There is a problem that takes a lot of accuracy and is also poor accuracy. Indeed, in patients with severe pain in the clinic, analgesic injections may not endure during radiosurgery, resulting in additional injections or even postponement and rest.

An object of the present invention for solving the above problems is to install a frame above the treatment table of the radiation equipment and to install a distance measuring means for measuring the distance between the frame and the patient in the treatment table of the radiation equipment It is to provide a patient position verification device for radiosurgery that can be positioned more quickly and accurately.

The present invention for achieving the above object is installed in the upper side of the treatment table of the radiation equipment in the radiation position patient position verification apparatus for verifying the position of the patient on the treatment table, and is installed to be seated on the upper side of the treatment table A frame consisting of a pair of side plates spaced at regular intervals on both sides of the patient, and a top plate which is connected to the pair of side plate upper ends and spaced at regular intervals on the upper side of the patient; It is installed on the frame characterized in that it comprises a distance measuring means for measuring the distance between the frame and the patient.

The present invention, by installing a frame on the upper side of the treatment table of the radiation equipment and the distance measuring means for measuring the distance between the frame and the patient, the position of the patient in the treatment table of the radiation equipment more quickly and accurately This can shorten the radiation surgery time, as well as to accurately irradiate the location of the patient's lesions to prevent medical accidents during radiation surgery.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Repeated descriptions of the same parts as in the prior art are omitted.

Figure 2 is a perspective view showing a patient position verification device for radiation surgery according to the present invention, Figure 3 is a perspective view showing a case of installing the patient position verification device for radiation surgery according to the invention on the treatment table upper side of the radiation equipment, 4 is a cross-sectional view taken along the line AA of Figure 3, showing a state of adjusting the position of the patient using the patient position verification device for radiation surgery.

Radiation surgery patient position verification device 1 according to the present invention is composed of a frame 10 and the distance measuring means 40, is installed above the treatment table (5) of the radiation equipment on the treatment table (5) It is a device to verify the position of the patient.

The frame 10 is installed to be seated on the upper side of the treatment table (5), and a pair of side plates 20 spaced at regular intervals on both sides of the patient, and connects the upper side of the pair of side plates 20. In addition, the upper plate 30 is spaced apart by a predetermined interval to the upper side of the patient.

Here, the frame 10 is to combine the pair of side plate 20 and the top plate 30 in the form of "c", the side plate 20 and the top plate 30 are coupled at a right angle, The lower end of the pair of side plates 20 is seated on the upper side of the treatment table (5).

In addition, when the patient is seated on the frame 10 on the upper side of the treatment table (5) lying down, the pair of side plates 20 are spaced apart from the patient at regular intervals, and the upper plate 30 also with the patient Spaced apart.

In addition, a groove 22 is formed at a lower end of the pair of side plates 20 to seat the protrusions 6 formed on both sides of the treatment table 5 to adjust the position of the patient. ) Will not flow.

In addition, a scale is displayed at the lower end of the side plate 20 at intervals of 1 mm, and dots are displayed at an interval of 5 cm on the upper side of the treatment table 5, thereby providing the patient position verification device 1 with the treatment table 5. In order to find the position of the patient, the patient position verification device (1) and the treatment table (5) at the time of the first installation for the purpose of locating the patient were recorded so that they could be found.

In the figure, only a scale is displayed at the lower end of the side plate 20, but numbers are preferably displayed together, and letters (such as alphabets) are also displayed at the point positions displayed on the side of the treatment table 5.

On the other hand, the frame 10 is preferably formed of a transparent plastic material such as a transparent acrylic plate so that the position can be displayed while viewing the body of the patient.

The distance measuring means 40 includes a plurality of through holes 41 formed to penetrate the side plate 20 and the upper plate 30, and are slidably inserted into the through holes 41. In addition, a scale is formed on the outer surface is made of a plurality of distance measuring bars 45 for measuring the distance between the side plate 20 and the top plate 30 and the patient.

Here, the distance measuring bar 45 is installed to the side plate 20 and the upper plate 30 so as to be slidable at right angles, respectively. At this time, the outer side surface of the side plate 20 and the top plate 30, the distance measuring bar 45 is not shaken in the state inserted into the through-hole 41 of the side plate 20 and the top plate 30 (21) (31) is further installed. The support plates 21 and 31 extend the length of the through hole 41 to support the distance measuring bar 45 so as not to shake.

The distance measuring bar 45 is formed with a pointed one end in contact with the patient's body, the handle 46 is formed on the other end, the scale is formed along the longitudinal direction on the outer surface.

In addition, the distance measuring bar 45 is formed in a group of a plurality is provided on the side plate 20 and the top plate 30, respectively. At this time, the number of the distance measuring bars 45 belonging to one group is preferably two to three are spaced apart from each other.

In the drawing, two pairs of distance measuring bars 45 are installed in each of the pair of side plates 20, and the upper plate 30 is formed of three groups each in two points spaced apart from each other. Although only the case where the distance measuring bar 45 is installed, the number or position of the distance measuring bar 45 may be variously changed according to the body shape or purpose of the patient.

In addition, the distance measuring bar 45 installed on the pair of side plates 20 measures the distance between the side plates 20 and both sides (flanks) of the patient, and is installed on the top plate 30. The distance measuring bar 45 measures the distance between the upper plate 30 and the upper side (bottom belly) of the patient.

At this time, when measuring the distance to a specific part (flank or lower belly) of the patient with the distance measuring bar 45, the distance measuring bar 45 does not measure one point, but composed of one group 2 Since three distance measuring bars 45 measure a plurality of points per one part of the patient, precision can be further increased.

On the other hand, the frame 10 is preferably installed on the pelvis side where the movement of the patient due to the movement or the deformation of the skin is the least, it may be installed in various positions of the patient depending on the purpose.

In addition, the scale formed on the outer surface of the distance measuring bar 45 allows the user to easily check the distance with the naked eye, and not only the scale but also letters (not shown) are displayed.

On the other hand, as the distance measuring means 40 in the above described only the case of using the distance measuring bar 45, in addition to the distance measuring bar 45 in addition to the distance sensor (not shown) that can measure the distance is installed May be used.

In addition, the side plate 20 and the upper plate 30 are respectively provided with a light pointer 50 so as to display a reference point on a specific portion of the patient, the patient for measuring the distance with the distance measuring means 40 Make it possible to quickly adjust the reference position of the.

As shown in the figure, one pair of optical pointers 50 are installed on the pair of side plates 20 at right angles, respectively, and two optical pointers 50 are spaced apart from each other at regular intervals on the upper plate 30. Direction is installed.

The role of the optical pointer 50 is to adjust the position (posture) of the patient, that is, the patient position precisely with the plurality of distance measuring bars 45 immediately in the state lying on the treatment table (5) Rather than fitting, the four optical pointers 50 are used to roughly position the patient.

In other words, the patient's current location should be recorded during the treatment planning phase, such as imaging the patient's lesion with CT or MRI, marking the area to be irradiated, or photographing the positions of the plurality of reflective beads described in the prior art. In practice, the patient's position during radiosurgery can be accurately positioned at the same position as the patient during the treatment planning phase.

Therefore, by measuring the distance between the frame 10 and the patient with the plurality of distance measuring bars 45 to record the position of the patient during the treatment planning step by recording the distance measured by each distance measuring bar 45 The exact position of the patient can be recorded. In this case, after the distance measurement is completed by the distance measuring bar 45, the four light pointers 50 mark the point irradiated on the patient's body with a writing instrument. do.

In this way, if the four light pointers 50 mark the spots to be irradiated, the same position as the first position (patient position at the treatment planning stage) is placed first on the treatment table 5 later. The position of the patient is approximately aligned by simply matching the points irradiated with the four light pointers 50 and the marked points on the body of the patient so as to be located at the position, and then the distance measuring bar 45 By positioning the patient more precisely.

Therefore, by installing four optical pointers 50 in the frame 10, the time for adjusting the position of the patient is further shortened.

As described above, the patient position verification device 1 according to the present invention, the position of the patient on the treatment table (5) of the radiation equipment and the patient position at the treatment planning stage or the patient position at the first radiation surgery As a device that can be located in the same position more quickly and accurately, it can be widely used in spinal radiation surgery to remove tumors in the spine as well as radiation surgery to remove tumors in the patient's body.

In addition, as described in the prior art by adjusting the position of the patient on the treatment table (5) the position of the plurality of reflective beads attached to the body of the patient and the position of the reflective beads of the image input to the path tracking device (not shown) Even when the matching is accurate, using the patient position verification device 1 of the present invention can be positioned more quickly and accurately.

That is, when photographing the position of the reflective beads attached to the body of the patient by CT or MRI, the current position of the patient is recorded by the patient position verification device 1, and a plurality of reflections attached to the body of the patient later In order to match the position of the bead with the position of the reflex bead of the image input to the lesion tracking device, the position of the patient on the treatment table 5 is determined using the patient position verifier 1. The patient can be positioned more quickly and accurately at the same position as the patient at the time of imaging.

On the other hand, since the molding (not shown) is formed on the upper side of the treatment table (5) is modeled after the dorsal shape of the patient to prevent the flow of the patient during radiation surgery.

Hereinafter, the operation of the patient position verification device for radiation surgery according to the present invention will be described.

First, at the treatment planning stage, such as photographing a patient's lesion by CT or MRI, marking a site to be irradiated, or photographing positions of a plurality of reflective beads attached to a patient's body described in the prior art. Proceed with recording the current position of the. In other words, it is very important to record the position of the patient during the treatment planning stage because the point where the lesion is marked on the body of the patient in the treatment planning stage is taken as a reference for the irradiation direction.

The method of recording the position of the patient during the treatment planning step, first to seat the frame 10 on the upper side of the treatment table (5) where the patient is lying, where the frame 10 corresponds to the pelvis side of the patient It is preferable to locate at the position to make.

Thereafter, the distance between the frame 10 and the patient is measured by the plurality of distance measuring bars 45, and the distances measured by the distance measuring bars 45 are recorded. At this time, if the serial number is given to each of the distance measuring bars 45 and the through-holes 41 of the frame 10, an error does not occur when the distance measured by each distance measuring bar 45 is conveniently generated. Do. Of course, the position coordinates of the contact point at which the scale displayed on the lower end of the frame 10 and the points displayed on the side of the treatment table 5 are also recorded.

After recording the distance measured by the distance measuring bar 45 as described above, the four light pointers 50 mark the spots irradiated on the patient's body with writing instruments.

By doing the above, it is possible to record the exact position of the patient during the treatment planning phase. Of course, not only at the treatment planning stage, but also the position of the patient after the radiation surgery can be accurately recorded, which means that the position of the patient at the next radiation surgery can be positioned the same as the position of the patient at the first surgery.

Subsequently, after completing the treatment plan, the patient is placed on the treatment table 5 of the radiation equipment. Thereafter, the position of the patient is positioned at the same position as the patient position or the first surgical position in the treatment plan. The method firstly mounts the frame 10 on the upper side of the treatment table 5. . At this time, the exact position of the frame 10 can be easily found using the position coordinates recorded in advance during the treatment planning step.

Afterwards, the position of the patient is approximately aligned by simply matching the points irradiated by the four light pointers 50 installed on the frame 10 with the four points marked in advance on the body of the patient.

After that, the position of the patient is more precisely adjusted with the plurality of distance measuring bars 45. The method may be performed by adjusting the position of the patient according to the measurement distance of each distance measuring bar 45 previously recorded. .

That is, the distance measuring bars 45 are inserted through the through holes 41 of the frame 10 by the distance previously recorded, and the distance measuring bars 45 are fully inserted by the distance recorded above. The distance measuring bar 45 may be gradually inserted while adjusting the position of the patient.

In this way, after positioning the distance measuring bars 45 in advance to the recorded distance, as shown in Figure 4, by adjusting the body position of the patient in various directions to the end of the body of the distance measuring bars 45 The patient's position is exactly at the same position as the patient's position in the treatment plan or the first surgical position.

At this time, the position of the reflective beads attached to the body of the patient is also exactly matched with the position of the reflective beads of the image input to the lesion tracking device.

Subsequently, after precisely aligning the position of the patient, the patient position verification device 1 is removed and radiation is irradiated to the patient's lesion to proceed with the surgery.

In this way, the position of the patient on the treatment table (5) of the radiation equipment by using the patient position verification device (1) can be located more quickly and accurately, thereby shortening the radiation surgery time, as well as the patient It is possible to accurately irradiate the location of the lesion to prevent medical accidents during radiation surgery.

In addition, the use of the patient position verification device 1 of the present invention can accurately match the position of the patient, thereby enabling to maintain the accuracy of the location of the patient and the position of irradiating the radiation very precisely. Therefore, even when the spinal nerve is in close contact with the lesion, the radiation control may be performed to the spinal nerve so that the lesion is necrotic while the radiation exposure is less than the allowable level using the IMRS method.

1 is a view showing a case where a plurality of infrared reflecting beads are conventionally attached around a patient's lesion position;

Figure 2 is a perspective view showing a patient position verification device for radiation surgery according to the present invention,

Figure 3 is a perspective view showing a case of installing the patient position verification apparatus for radiation surgery according to the present invention on the upper side of the treatment table of the radiation equipment,

Figure 4 is a cross-sectional view taken along the line A-A of Figure 3, showing a state of adjusting the position of the patient using the patient position verification device for radiation surgery.

<Description of Signs of Major Parts of Drawings>

1: Patient position verification device 10: Frame

20: side plate 21, 31: support plate

22: groove 30: top plate

40: distance measuring means 41: through hole

45: distance measuring bar 46: handle

50: optical pointer

Claims (4)

In the radiation position patient position verification apparatus installed above the treatment table (5) of the radiation equipment to verify the position of the patient on the treatment table (5), The pair of side plates 20 which are installed to be seated on the upper side of the treatment table 5 and spaced at regular intervals on both sides of the patient, and the upper side of the pair of side plates 20 are connected to the upper side of the patient. Frame 10 consisting of a top plate 30 spaced apart by a predetermined interval; And a distance measuring means (40) installed on the frame (10) to measure the distance between the frame (10) and the patient. The method of claim 1, The distance measuring means 40 includes a plurality of through holes 41 formed to penetrate the side plate 20 and the upper plate 30, respectively; A plurality of distance measuring bars 45 are installed to be slidably inserted into the through hole 41 and a scale is formed on the outer surface to measure the distance between the side plate 20 and the upper plate 30 and the patient. Patient position verification device for radiation surgery, characterized in that made. The method of claim 2, The distance measuring bar 45, a plurality of distance measuring bars 45 spaced apart from each other to form a group, the radiation plate patient position, characterized in that installed on the side plate 20 and the top plate 30, respectively Verification device. The method of claim 1, The side plate 20 and the top plate 30 is provided with an optical pointer 50 to display a reference point on a specific portion of the patient, the reference position of the patient for measuring the distance with the distance measuring means 40 Patient position verification device for radiation surgery, characterized in that to be able to quickly fit.

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