CN203736725U

CN203736725U - Gamma knife treatment precision detecting apparatus

Info

Publication number: CN203736725U
Application number: CN201320863248.1U
Authority: CN
Inventors: 李胜元
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-25
Filing date: 2013-12-25
Publication date: 2014-07-30
Anticipated expiration: 2023-12-25

Abstract

The utility model provides a gamma knife treatment precision detecting apparatus. The apparatus comprises a water tank and a film clamp used for clamping a film for exposure detection. The film clamp is inserted in the water tank. A sealing cover is arranged on the water tank. The thickness of the sealing cover is equal to that of the wall of the water tank. The film clamp comprises a first clamping piece and a second clamping piece which can be separated. The first clamping piece and the second clamping piece clamp the film from the two sides. The face where the first clamping piece and the second clamping piece contact the film is rectangular. A plurality of first observation holes penetrate the first clamping piece and the second clamping piece. The first observation holes are equidistantly distributed in arrays. The gamma knife treatment precision detecting apparatus can represent any point in the plane of the positioning head frame basal ring of a gamma knife and perform gamma knife treatment precision multi-point detection. MRI positioning head gamma knife treatment precision deviation can be conveniently detected and corrected. The apparatus can be further used for judging and guiding whether MRI equipment can be directly used for gamma knife positioning.

Description

Gamma knife treatment precision detection device

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to gamma sword treatment precision detection device.

Background

Compared with the CT technology, the Magnetic Resonance Imaging (MRI) technology can provide more detailed anatomical images, but the current gamma knife treatment precision detection is single-point detection, and whether the MRI image is deformed due to magnetic susceptibility artifacts and chemical shift artifacts cannot be determined. The multi-point detection is clinically needed to be carried out on the MRI positioning gamma knife treatment, so as to find whether the MRI positioning image has deformation or not and whether the treatment precision of the gamma knife can be ensured after correction, and judge whether the MRI equipment can be directly used for the head gamma knife treatment positioning or not. Because the gamma knife slides at a uniform speed in the process of finishing dynamic focusing along the C-shaped arm, the difference of depth and dosage at different angles is ignored, so that the solid organic glass mould deviates from the observation point of the center of the circle and has multiple elliptic focal spots, and the falling point precision of each focal spot also has obvious difference, so the gamma knife is not suitable for the multipoint detection of the treatment precision of the gamma knife. With the increasing popularization of the gamma knife, how to perform multi-point detection on the treatment precision of the gamma knife so that each observation point obtains a complete circular focal spot is very necessary.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a gamma sword treatment precision detection device, overcome above-mentioned defect, can arrange in the representation gamma sword positioning head frame base ring plane arbitrary a bit with a plurality of first inspection hole equidistance arrays on the X-Y plane, and can obtain complete circular exposure focal spot, develop the multiple spot of gamma sword treatment precision and detect, discovery and correction MRI positioning head gamma sword treatment precision deviation improve the treatment accuracy nature, finally make the medical quality of gamma sword obtain guaranteeing.

In order to solve the technical problem, the utility model provides a gamma sword treatment precision detection device, include the water tank and be used for the film clamp of the film that the centre gripping detected that exposes, the film clamp is inserted and is established in the water tank, be equipped with sealed lid on the water tank, the thickness of sealed lid with the thickness of the wall of water tank equals, the film clamp includes separable first clamping piece and second clamping piece, first clamping piece and second clamping piece are from both sides centre gripping the film, first clamping piece and second clamping piece with the shape of the contact surface of film is the rectangle, and a plurality of first inspection holes run through first clamping piece and second clamping piece, a plurality of first inspection hole equidistance array is arranged.

As a preferred scheme of gamma sword treatment accuracy testing device, the number of first inspection hole is 25, first inspection hole uses film clamp central point to arrange into 5 x 5 matrix as central symmetry, and the hole distance of two adjacent first inspection holes of moving about freely and quickly is 30mm, and the aperture is 3 mm.

As an optimized proposal of the gamma knife treatment precision detection device of the utility model, the added thickness of the first clamping piece and the second clamping piece of the film clamp is 10 mm.

As the utility model relates to a gamma sword treatment precision detection device's an preferred scheme, still be equipped with the counterpoint bayonet socket on the film clamp, the counterpoint bayonet socket runs through first clamping piece and second clamping piece.

As an optimal selection scheme of gamma sword treatment accuracy testing device, gamma sword treatment accuracy testing device still includes the scale, the scale with the outer wall laminating of water tank is fixed, the contact plane of first clamping piece and second clamping piece with the scale is perpendicular.

As a gamma sword treatment accuracy testing device's an preferred scheme, be equipped with a plurality of second inspection holes on the scale, the distance of two adjacent second inspection holes is CT and MRI scanning thick multiple, and is a plurality of two rows of structures about the setting of second inspection hole is, goes up to arrange for the location mark hole, and it does down to arrange the scale film of scale presss from both sides the mark hole.

As an optimal scheme of gamma sword treatment accuracy testing arrangement, the number of second inspection hole is 5, the distance of two adjacent second inspection holes is 3mm^*The diameter of the positioning mark hole is 2mm, and the diameter of the scale film clamp mark hole is 3 mm.

As an optimized proposal of the gamma knife treatment precision detection device of the utility modelThe number of the second observation holes is 5, and the distance between every two adjacent second observation holes is 5mm^*And 5-25 mm, the diameter of the positioning mark hole is 3mm, and the mark hole of the scale film clamp is 3 mm.

As a preferred scheme of gamma sword treatment accuracy testing device, gamma sword treatment accuracy testing device still includes head frame foundation ring, head frame foundation ring one side is inlayed and is established the water tank, the opposite side is fixed with gamma sword treatment bed, the mid point of water tank extremely the line of the mid point of head frame foundation ring with the central line of head frame foundation ring is on a straight line.

As a preferred scheme of gamma sword treatment accuracy testing device, gamma sword treatment accuracy testing device is still including fixed spacing seat, head frame foundation ring is installed to water tank one side, and fixed spacing seat is installed to the opposite side, be equipped with a plurality of spacing holes on the fixed spacing seat.

Compared with the prior art, the utility model provides a gamma sword treatment accuracy detection device can make a plurality of first inspection holes that the equidistance array was arranged obtain a plurality of complete circular exposure focal spots to can represent arbitrary a bit of treatment accuracy in gamma tool bit frame base ring plane, can carry out gamma sword treatment accuracy multiple spot and detect, be convenient for discover and revise the deviation of MRI location head gamma sword treatment accuracy, judge and guide MRI can directly be used for gamma sword location.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein,

fig. 1 is a schematic perspective view of a gamma knife treatment accuracy detection device according to a first embodiment of the present invention;

fig. 2 is a schematic perspective view of a gamma knife treatment accuracy detecting device according to a second embodiment of the present invention;

fig. 3 is a schematic perspective view of a gamma knife treatment accuracy detecting device according to a third embodiment of the present invention;

fig. 4 is a schematic perspective view of a gamma knife treatment accuracy detecting device according to a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a front view of a film holder in the gamma knife treatment accuracy detection device of the present invention;

fig. 6 is a schematic structural diagram of a front view of a positioning member in the gamma knife treatment accuracy detection device of the present invention.

Wherein: the device comprises a water tank 1, a film clamp 2, a first clamping piece 3, a second clamping piece 4, a fixing device 5, a sealing cover 6, a second observation hole 7, a scale 8, a head frame base ring 9, a fixing limiting seat 10, a first observation hole 11, an alignment bayonet 12 and a through hole 13.

Detailed Description

A gamma sword treatment precision detection device, it includes: the water tank 1 with be used for the centre gripping to expose the film (not shown in the figure) of detection film and press from both sides 2, film presss from both sides 2 and inserts and establishes in the water tank 1, be equipped with sealed lid 6 on the water tank 1, the thickness of sealed lid 6 with the thickness of the wall of water tank 1 equals, film presss from both sides 2 and includes separable first clamping piece 3 and second clamping piece 4, first clamping piece 3 and second clamping piece 4 centre gripping from both sides the film, first clamping piece 3 and second clamping piece 2 with the shape of the contact surface of film is the rectangle, and a plurality of first inspection holes 11 run through first clamping piece 3 and second clamping piece 4, a plurality of first inspection holes 11 equidistance array is arranged.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the following embodiments.

First, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with at least one implementation of the invention is included. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Secondly, the utility model discloses utilize the structure schematic diagram etc. to describe in detail, when detailing the embodiment of the utility model, for the convenience of explanation, the schematic diagram that shows gamma sword treatment precision detection device structure can not do local the enlargeing according to general proportion, moreover the schematic diagram is the example only, and it should not limit the scope of the utility model protection here. In addition, the actual fabrication process should include three-dimensional space of length, width and depth.

Example one

Referring to fig. 1, fig. 1 is a schematic perspective view of a gamma knife treatment accuracy detection device according to a first embodiment of the present invention. As shown in fig. 1, the gamma knife treatment precision detection device comprises: the device comprises a water tank 1 and a film clamp 2 used for clamping a film for exposure detection, wherein the film clamp 2 is inserted into the water tank 1, a sealing cover 6 is arranged on the water tank 1, the thickness of the sealing cover 6 is equal to that of the wall of the water tank 1, so that the sealing cover 6 not only prevents liquid in the water tank 1 from splashing, but also more importantly, the thickness is equal, and the gamma knife treatment precision detection device can be exposed uniformly in the using process. Here, it should be noted that: since the film holder 2 cannot be seen after the water tank 1 is covered with the sealing cover 6, the sealing cover 6 is removed in fig. 1, and the specific structure of the sealing cover 6 can be seen in fig. 2.

The film clamp 2 comprises a first clamping piece 3 and a second clamping piece 4 which can be separated, the first clamping piece 3 and the second clamping piece 4 clamp the film from two sides, the contact surface of the first clamping piece 3 and the second clamping piece 2 with the film is rectangular, a plurality of first observation holes 11 penetrate through the first clamping piece 3 and the second clamping piece 4, and the plurality of first observation holes 11 are arranged in an equidistant array.

Since the stereoscopic position of the film holder 2 in fig. 1 is difficult to clearly express the position of the first observation hole 11, it is omitted in fig. 1. Specifically, please refer to fig. 5 for the position of the first observation hole 11, and fig. 5 is a schematic structural diagram of a front view of a film clip in the gamma knife treatment precision detection apparatus of the present invention. Fig. 5 clearly shows the positions of the first observation holes 11, the number of the first observation holes 11 can be set to be n × n (n is an odd number), the number of the first observation holes 11 in the transverse direction is equal to the number of the first observation holes 11 in the longitudinal direction, and when the first observation holes 11 are set in a manner that n is greater than 5, because there are too many first observation holes 11, when exposure occurs, the points interfere with each other, and the detection time is too long; when the first observation hole 11 is set in a manner that n is smaller than 5, because too few first observation holes 11 are provided, the representativeness is poor, and it is difficult to accurately find the change rule of the positioning image. Therefore, more preferably, as shown in fig. 5, the number of the first observation holes 11 is 25, the first observation holes 11 are symmetrically arranged in a 5 × 5 matrix with the center point of the film holder 2 as the center, the hole distance between every two vertically and horizontally adjacent first observation holes 11 is 30mm, and the hole diameter is 3mm, so that the 25 first observation holes 11 are symmetrical about the connecting line of the first observation holes 11 in the third row and the third column, which is favorable for finding whether the image is distorted or not and regular, and the hole distance between every two vertically and horizontally adjacent first observation holes 11 is 30mm, the vertical and horizontal span of the matrix is 12cm, and the diagonal is 16.97cm, so that the first observation hole 11 matrix covers the cranial gamma knife treatment section, and is convenient for mounting the film, and meets the detection requirement.

When the film clamp 2 is too thick, especially for a full organic glass column mold, the exposure focal spot is deformed and deviates from the center of the mark point due to different distances from each observation point to the periphery of the mold and different doses injected into the observation points at the periphery during exposure detection. Therefore, in the present embodiment, the thickness of the film holder 2 can be set to 8-12 mm. More preferably, the thickness of the film holder 2 is set to 10 mm.

In this embodiment, the position of the film holder 2 to be placed in the water tank 1 can be freely selected, and more preferably, the film holder 2 is inserted into the water tank 1 as shown in fig. 1 so that the water tanks on both sides of the film holder 2 are divided into two equal parts.

In order to further fix the film clamp 2 and prevent the film clamp 2 from shaking during the scanning process to affect the detection accuracy, the film clamp 2 can be fixed in position by a fixing device 5 arranged on the inner side of the water tank 1, and the structure of the fixing device 5 can be various and is common knowledge, so the details are not repeated herein.

Although the matrix of the first observation holes 11 of the film holder 2 is made to be symmetrical up and down, left and right, in order to standardize the detection process, an alignment bayonet 12 is further disposed on the film holder 2, please refer to fig. 5, as shown in fig. 5, the alignment bayonet 12 penetrates through the first clamping piece 3 and the second clamping piece 4. At the moment, the alignment bayonet 12 plays a limiting role, and human errors caused by the fact that the film clamp 2 is turned upside down and overturned due to carelessness of an operator in the detection process are avoided.

In the above embodiment, although the electron density and proton density of the imaging background liquid in the water tank 1 penetrating into the first observation hole 11 are different from those of organic glass, positioning and detection can be completed only by using the film clamp 2, in this embodiment, a positioning member is usually used first, and the positioning member is inserted into the original film clamp 2 of the water tank 1 to obtain a positioning image, and then the positioning member is taken out, and since exposure detection is performed by replacing the positioning member with the film clamp 2 holding a film, the film clamp 2 is inserted again to perform exposure detection. Because the schematic diagram of the main view structure of the positioning member is the same as the schematic diagram of the main view structure of the film holder 2 in fig. 5, the drawings are not provided repeatedly, and the mixed liquid of diatrizoate meglumine and gadopentate meglumine is filled in the third observation hole (not shown) of the positioning member (overlapped with the first observation hole 11 of the film holder 2), so that the positioning member does not need to be replaced under CT and MRI, and the accuracy of using the CT positioning coordinate as a reference is ensured.

For more convenience, still can set up a plurality of through-holes 13 on the setting element, please refer to fig. 6, fig. 6 is the utility model discloses a structural schematic diagram of the front view of setting element among gamma sword treatment accuracy testing device, as shown in fig. 6, the setting of through-hole 13 makes the operator need not again insert and be equipped with the film clamp 2 the both sides of water tank 1 add liquid respectively, only need add liquid in one side after, alright flow to the opposite side through-hole 13, like this, has not only accelerated liquid flow, but also has guaranteed the homogeneity of both sides liquid. The arrangement of the through hole 13 in the positioning piece enables an MRI background liquid signal to be present on an image of the positioning piece, and image distortion possibly caused by a full organic glass positioning piece is avoided.

Example two

In the second embodiment, while keeping the same as the first embodiment, the structure of the scale 8 is added. Referring to fig. 2, fig. 2 is a schematic perspective view of a gamma knife treatment precision detection device according to a second embodiment of the present invention. As shown in fig. 2, the scale 8 is fixed to the outer wall of the water tank 1 in an attached manner, and the contact plane between the first clamping piece 3 and the second clamping piece 4 is perpendicular to the scale 8, that is, the scale 8 is consistent with the Z axis of the gamma knife coordinate system. For a clearer explanation, the relationship between the film holder 2 and the scale 8 can be determined by using the X-axis, the Y-axis and the Z-axis of the coordinate system of the gamma knife treatment table, wherein the film holder 2 detects the treatment precision of the XY axis, and the scale 8 detects the treatment precision of the Z axis.

The scale 8 is further provided with a plurality of second observation holes 7, the distance between two adjacent second observation holes 7 is a multiple of the thickness of the CT and MRI scanning layers, the plurality of second observation holes 7 are arranged in an upper row and a lower row, the upper row is provided with positioning mark holes (not shown), and the lower row is provided with scale film clamp mark holes (not shown) of the scale 8. In this embodiment, a 3mm scan setting is 24mm, or a 5mm scan setting is 25 mm. Wherein the diameter of the positioning mark hole scanned by 3mm is 2mm, the diameter of the positioning mark hole scanned by 5mm is 3mm, and the mark holes of the scale film clamp are all 3 mm.

EXAMPLE III

The third embodiment is consistent with the second embodiment, and meanwhile, the structure of the head base ring 9 is added. Referring to fig. 3, fig. 3 is a schematic perspective view of a gamma knife treatment accuracy detection apparatus according to a third embodiment of the present invention. As shown in fig. 3, the water tank 1 is embedded in one side of the head frame base ring 9, the other side of the head frame base ring is fixed to a gamma knife treatment couch, and a connecting line from the midpoint of the water tank 1 to the midpoint of the head frame base ring 9 is aligned with the center line of the head frame base ring 9. The water tank 1 is fixed by a head frame base ring 9 and is connected with a gamma knife treatment bed. Since the head base ring 9 is common knowledge in the medical field, it will not be described in detail herein. It should be noted that the present embodiment is mainly used for simulating the head gamma knife treatment to detect and correct the accuracy of the head gamma knife treatment.

Example four

The fourth embodiment is consistent with the third embodiment, and meanwhile, the structure of the fixed limiting seat 10 is added. Specifically, referring to fig. 4, fig. 4 is a schematic perspective view of a gamma knife treatment accuracy detection apparatus according to a fourth embodiment of the present invention. As shown in fig. 4, a head frame base ring 9 is installed on one side of the water tank 1, a fixed limiting seat 10 is installed on the other side of the water tank, and a plurality of limiting holes 14 are formed in the fixed limiting seat 10. The fixed limit seat 10 is combined with the head frame base ring 9, so that the water tank 1 can be directly and horizontally placed on a bed board of a gamma knife treatment bed, a bottom plate (not shown) for fixing the limit seat 10 is fixed on the treatment bed, and in addition, the arrangement of the plurality of limit holes 14 enables the water tank 1 to be repeatedly placed for a plurality of times in the body treatment precision detection. It should be noted that, in this embodiment, by combining the two components, namely the fixed limiting seat 10 and the head base ring 9, after the head positioning scanning is completed, the position of the water tank 1 is moved to perform positioning scanning on the detection of the gamma knife treatment accuracy of the body portion.

The specific operation process of the lower gamma knife treatment is described below.

In the installation and debugging and daily treatment precision detection of the gamma knife, the whole process of the gamma knife treatment needs to be simulated through the detection mould, the matching error of the gamma knife and the positioning equipment is eliminated, the target point precision and the medical quality of a human body in actual treatment are ensured, and adverse consequences caused by inaccurate target points are prevented.

Taking the third embodiment as an example, the specific working principle is as follows:

and filling a mixed solution of diatrizoate meglumine and gadopencardia meglumine in a third observation hole on the positioning piece, and then filling the mixture into a water tank 1 made of organic glass. The water tank 1 is fixed by a headstock base ring 9 and is connected with a treatment bed, and CT and MRI positioning images of 25 first observation holes 11 on the film clamp 2 are respectively acquired by simulating head gamma knife treatment. In order to be equal to the MRI quality control detection condition and avoid the defects of distortion caused by different imaging backgrounds and no signal under the MRI of the full organic glass mold, the water tank 1 is filled with liquid, such as 10mmul/L blue copperas solution used in the MRI quality control detection. Completely scanning the water tank 1, and inputting the positioning image into a gamma knife treatment planning system to carry out 25-point matrix coordinate measurement and analysis; the treatment plan takes a 25-point matrix of an X-Y plane and 5 second observation holes 7 on a Z scale 8 as target points, and the coordinates and the falling point deviation of focal spots of all the observation points are obtained by a film method. During exposure, a non-processing film of the appropriate size is mounted on the film holder 2 and the center of the mark is marked on each film. The film clamp 2 replaces the positioning piece and the Z scale 8 film, and then the gamma knife is operated according to the plan to expose the film after the film is put in place. In order to avoid different depth doses, the water tank 1 is not filled with copper sulfate solution during exposure, and is directly emptied to avoid different depth doses at different dynamic focusing angles, so that complete circular focal spots of 25 first observation holes 11 arranged in a matrix are obtained, and the distances (mean +/-standard deviation) between the central points of the focal spots and the marking points on all coordinate axes are measured and calculated by a computer to obtain the treatment precision deviation. After obtaining the standard coordinate which is verified by CT positioning detection and has the treatment precision deviation less than 0.5mm, the falling point deviation of MRI positioning exposure is compared with the standard coordinate, and the deformation and the rule of the MRI positioning image are found and found out. Through the exposure verification of the film after the coordinates of 25 first observation holes 11 are positioned on the MRI and are corrected according to the deviation mean +/-deformation coefficient, the treatment precision deviation is less than 0.5mm, and the MRI can be directly used for the treatment positioning of the gamma knife. The Z scale 8 reflects the progressive and in-place accuracy of the diagnosis and treatment bed, is irrelevant to the deformation of an MRI positioning image, and can be directly corrected according to the deviation mean value.

The components of the gamma knife treatment precision detection device include, but are not limited to, the above mentioned types. It should be understood by those skilled in the art that one of the features or objects of the present invention is to: gamma sword treatment accuracy detection device, can represent arbitrary a bit in the gamma sword positioning head frame base ring plane, can obtain the check point of a plurality of complete circular exposure focal spots moreover, can develop gamma sword treatment accuracy multiple spot and detect, be convenient for discover and revise the deviation of MRI location head gamma sword treatment accuracy, can judge and guide whether MRI can directly be used for gamma sword location.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. A gamma knife treatment precision detection device is characterized in that: the film clamp comprises a water tank and a film clamp used for clamping a film to be exposed and detected, the film clamp is inserted into the water tank, a sealing cover is arranged on the water tank, the thickness of the sealing cover is equal to that of the wall of the water tank, the film clamp comprises a first clamping piece and a second clamping piece which can be separated, the first clamping piece and the second clamping piece are clamped from two sides of the film, the shape of the contact surface of the first clamping piece and the second clamping piece is rectangular, a plurality of first observation holes penetrate through the first clamping piece and the second clamping piece, and the first observation holes are arrayed in an equidistant mode.

2. The gamma knife treatment accuracy testing device of claim 1, which is characterized in that: the number of the first observation holes is 25, the first observation holes are symmetrically arranged into a 5-by-5 matrix by taking the center point of the film clamp as a center, the hole distance between every two vertically and horizontally adjacent first observation holes is 30mm, and the hole diameter is 3 mm.

3. The gamma knife treatment accuracy testing device of claim 1, which is characterized in that: the first and second clips of the film clip have an added thickness of 10 mm.

4. The gamma knife treatment accuracy testing device of claim 1, which is characterized in that: the film clamp is further provided with an alignment bayonet, and the alignment bayonet penetrates through the first clamping piece and the second clamping piece.

5. The gamma knife treatment accuracy testing device of claim 1, which is characterized in that: the gamma knife treatment precision detection device further comprises a scale, the scale is attached to and fixed with the outer wall of the water tank, and the contact plane of the first clamping piece and the second clamping piece is perpendicular to the scale.

6. The gamma knife treatment accuracy testing device of claim 5, which is characterized in that: the scale is provided with a plurality of second observation holes, the distance between every two adjacent second observation holes is a multiple of the thickness of CT and MRI scanning layers, the plurality of second observation holes are arranged in an upper row and a lower row, the upper row is provided with positioning mark holes, and the lower row is provided with scale film clamp mark holes of the scale.

7. The gamma knife treatment accuracy testing device of claim 6, which is characterized in that: the number of the second observation holes is 5, the distance between two adjacent second observation holes is 3mm 8=24mm, the diameter of the positioning mark hole is 2mm, and the mark hole of the scale film clamp is 3 mm.

8. The gamma knife treatment accuracy testing device of claim 6, which is characterized in that: the number of the second observation holes is 5, the distance between two adjacent second observation holes is 5mm by 5=25mm, the diameter of the positioning mark hole is 3mm, and the mark hole of the scale film clamp is 3 mm.

9. The gamma knife treatment accuracy testing device of claim 1, which is characterized in that: the gamma knife treatment precision detection device also comprises a head frame base ring, one side of the head frame base ring is embedded with the water tank, the other side of the head frame base ring is fixed with the gamma knife treatment bed, and a connecting line from the midpoint of the water tank to the midpoint of the head frame base ring and the central line of the head frame base ring are on the same straight line.

10. The gamma knife treatment accuracy testing device of claim 9, wherein: the gamma knife treatment precision detection device also comprises a fixed limiting seat, a head frame base ring is installed on one side of the water tank, the fixed limiting seat is installed on the other side of the water tank, and a plurality of limiting holes are formed in the fixed limiting seat.