Mechanical property quality control die body of multifunctional medical electron linear accelerator

Abstract

The utility model discloses a mechanical property quality control die body of a multifunctional medical electron linear accelerator, and belongs to the technical field of radiotherapy equipment. The quality control die body is of a cube structure and comprises a front end face, an upper end face, a rear end face, a left end face, a right end face and a lower end face. The upper end face is composed of a plurality of concentric squares which are sequentially arranged, the vertical length from the concentric original point to the edge of the square on the innermost layer is the reference distance, and the vertical length difference of the edges of the squares which are arranged in a connected mode is the reference distance. Tungsten balls are arranged on the concentric original point and the four vertexes of each square; a second coordinate surface, a first film slot position and a second film slot position are arranged on the upper end surface; according to the utility model, multiple items of daily inspection, monthly inspection and annual inspection of the mechanical properties of the accelerator are completed through the quality control die body. By using the quality control die body provided by the utility model, the inspection items can be integrated, so that the whole mechanical quality control process is simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of radiotherapy equipment, and in particular relates to a multifunctional mechanical performance quality control model of a medical electronic linear accelerator. Background Art

[0002] The quality control of medical electron linear accelerator (hereinafter referred to as accelerator) includes dosage, mechanics, imaging, safety, etc. The quality control of mechanical performance is divided into daily inspection, monthly inspection and annual inspection items. Among them, the daily inspection items include the accuracy of the optical distance scale display, the accuracy of the laser light positioning, the accuracy of the jaw position, and the accuracy of the multi-leaf collimator position. The monthly inspection items include the accuracy of the laser light positioning, the accuracy of the jaw position, the accuracy of the multi-leaf collimator position, the accuracy of the crosshair center position, the accuracy of the bracket accessories position, the accuracy of the frame and collimator angle display, the accuracy of the treatment bed angle display, the accuracy of the treatment bed position, the consistency of the light field and the radiation field, the concentricity of the frame rotation, and the concentricity of the treatment bed rotation. For accelerators with six-dimensional beds, the monthly inspection of mechanical performance also includes the pitch and roll angle display accuracy of the treatment bed.

[0003] The annual inspection items include the accuracy of the static IMRT multi-leaf collimator, the accuracy of the dynamic IMRT multi-leaf collimator, the collimator rotation concentricity, the gantry rotation concentricity, the consistency between the X-ray beam radiation field isocenter and the mechanical isocenter, the treatment bed rotation concentricity, the weight-bearing sag and horizontality of the treatment bed surface, and the accuracy of the treatment bed's extreme positions.

[0004] The quality control content of the mechanical properties of the accelerator is relatively large, and many types of quality control models are required, such as coordinate paper, level ruler, film, etc., which brings many inconveniences to physicists in quality control. Utility Model Content

[0005] The purpose of the utility model is to provide a multifunctional medical electron linear accelerator mechanical performance quality control phantom to solve the problem that there are many types of accelerator mechanical performance quality control measurement phantoms proposed in the above background technology, which brings many inconveniences to quality control physicists.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] A multifunctional medical electron linear accelerator mechanical property quality control phantom is a cubic structure, comprising a front end face, an upper end face, a rear end face, a left end face, a right end face and a lower end face; the upper end face is composed of a plurality of concentric squares arranged in sequence, the vertical length from the concentric origin to the edge of the innermost square is a reference distance, and the vertical length difference between the edges of the consecutively arranged squares is a reference distance; tungsten balls are arranged on the concentric origin and the four vertices of each of the squares; a second coordinate plane, a first film slot position, and a second film slot position are arranged on the upper end face; the first film slot position and the second film slot position are respectively arranged at opposite ends of the second coordinate plane.

[0008] Further preferably, a tungsten ball is arranged on the edge of the upper end surface at a reference distance from each of the square vertices.

[0009] Further preferably, the diameter of the tungsten ball is 2 mm.

[0010] Further preferably, the second coordinate plane is a coordinate plane with a resolution of 1 mm and a length and width of 42 cm.

[0011] Further preferably, a crosshair, a level bubble and a digital level are provided on the left end surface; the crosshair is provided at the center of the square on the left end surface.

[0012] Further preferably, a first coordinate plane is arranged on the right end surface.

[0013] Further preferably, the first coordinate plane is a coordinate plane of 40 cm×40 cm.

[0014] Further preferably, the lower end surface comprises a circular protractor and a leveling nut, and the circular protractor is arranged at the center position of the lower end surface.

[0015] Further preferably, there are four leveling nuts, which are evenly distributed on the lower end surface near the four vertex corners.

[0016] Further preferably, a level bubble is also provided on the lower end surface.

[0017] The multifunctional medical electron linear accelerator mechanical property quality control phantom of the utility model integrates multiple quality control functions, thereby reducing the number of different tools and equipment that physicists need to use during the quality control process. The multifunctional quality control phantom is designed to have multiple modules to adapt to different mechanical property quality control needs. By integrating multiple quality control functions into one module, physicists can complete multiple inspection projects through one quality control phantom without switching different quality control equipment. In summary, the multifunctional medical electron linear accelerator mechanical property quality control phantom is a solution that can reduce the number of different tools and equipment used by physicists during the quality control process, simplify the quality control process, improve efficiency, and reduce inconvenience. This will bring many benefits to the quality control work of the accelerator's mechanical properties.

[0018] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0019] In the utility model, a multifunctional medical electron linear accelerator mechanical performance quality control phantom is used to complete multiple daily, monthly and annual inspections of the accelerator's mechanical performance. The use of the utility model can simplify the mechanical quality control process and improve efficiency. In traditional accelerator mechanical performance testing, each test item may require different tools, equipment and operating steps. However, by using the quality control phantom in the utility model, these inspection items can be integrated, thereby simplifying the entire mechanical quality control process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of accelerator coordinates in an embodiment;

[0021] Figure 2 is a schematic structural diagram of the front end surface of the quality control phantom in the embodiment;

[0022] Figure 3 is a structural schematic diagram of the rear end surface of the quality control phantom in the embodiment;

[0023] Figure 4 Schematic diagram of the structure of the left end surface of the quality control phantom in the embodiment;

[0024] Figure 5 is a structural schematic diagram of the right end surface of the quality control phantom in the embodiment;

[0025] Figure 6 is a schematic structural diagram of the upper end surface of the quality control phantom in the embodiment;

[0026] Figure 7 Schematic diagram of the structure of the lower end surface of the quality control phantom in the embodiment. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] At present, there are many types of existing mechanical performance quality control measurement phantoms for accelerators, which brings many inconveniences to the quality control physicists. In order to solve the above technical problems, the utility model proposes a multifunctional mechanical performance quality control phantom for medical electron linear accelerators.

[0033] Figure 1 The figure shows a schematic diagram of the accelerator coordinates; the quality control phantom 1 of the utility model is placed on the accelerator treatment bed 2, and the collimator 4 is arranged on the top of the frame 3; the XZY coordinate axis is as shown in FIG. Figure 1 as shown in .

[0034] Example

[0035] like Figure 2 As shown, the front end face of the mechanical property quality control phantom 1 of the multifunctional medical electron linear accelerator is composed of a number of concentric squares 11 arranged in sequence, the vertical length from the concentric origin to the edge of the innermost square is the reference distance, and the vertical length difference between the edges of the consecutively arranged squares is a reference distance; tungsten balls 12 are arranged at the concentric origin and the four vertices of each of the squares. Further preferably, a tungsten ball 12 is arranged on the edge one reference distance away from each vertex of the square. In this embodiment, the diameter of the tungsten ball is 2 mm. A leveling nut 13 is arranged on the lower end face of the bottom. As shown Figure 6 As shown, the upper end surface of the mechanical performance quality control phantom 1 of the multifunctional medical electron linear accelerator is provided with a second coordinate plane 20, a first film slot position 18, and a second film slot position 19; the first film slot position 18 and the second film slot position 19 are respectively arranged at opposite ends of the second coordinate plane 20. In this embodiment, the second coordinate plane 20 is a coordinate plane with a resolution of 1mm and a length and width of 42cm. The front end surface of the quality control phantom in this embodiment can measure the accuracy of the jaw in place (monthly inspection), the accuracy of the multi-leaf collimator in place (monthly inspection), and the consistency of the light field and the radiation field (monthly inspection).

[0036] Among them, the specific detection method of the accuracy of the jaw position (monthly inspection) is as follows: the frame 3 and the collimator 4 are rotated to 0 degrees, the front end face of the quality control phantom 1 is placed horizontally, the film is placed horizontally in the first film slot 18, the quality control phantom 1 is adjusted so that the plane where the film is located is SDD (Source to Detector Distance) = 100 cm, the multi-leaf collimator is opened to the maximum position, and the jaws are adjusted to 10cm×10cm, 20cm×20cm, 30cm×30cm, 40cm×40cm respectively, and the beam is irradiated; the optical density of the film is analyzed, and the deviation between the measured value from the tungsten ball to the end position of the jaw and the set value is calculated, so as to obtain the accuracy of the jaw position when the frame is 0 degrees (monthly inspection). Similarly, rotate the frame 3 to 90 degrees / 270 degrees, place the front end of the phantom vertically toward the frame 3, and place the film vertically into the first film slot 18. Repeat the above operation to obtain the accuracy of the jaw in place when the frame angle is 90 degrees / 270 degrees (monthly inspection).

[0037] Among them, the specific detection method of the multi-leaf collimator position accuracy (monthly inspection) is as follows: the rack 3 and collimator 4 are rotated to 0 degrees, the front end face of the quality control phantom 1 is placed horizontally, the film is placed horizontally in the first film slot 18, and the quality control measurement phantom is adjusted so that the film is placed flat at SDD = 100cm; the jaw is opened to the maximum position, and the multi-leaf collimator is set to form a fence test field group, and the beam is irradiated; the film is subjected to optical density analysis, and the deviation between the measured value and the set value of the leaf end position is calculated, and the multi-leaf collimator position accuracy (monthly inspection) when the rack is 0 degrees can be obtained. Similarly, the rack 3 angle is rotated to 90 degrees / 270 degrees, the front end face of the quality control phantom 1 is placed vertically toward the rack 3, and the film is placed vertically in the first film slot 18. Repeat the above operation to obtain the multi-leaf collimator position accuracy (monthly inspection) when the rack is 90 degrees / 270 degrees.

[0038] Among them, the specific detection method of the consistency of the light field and the radiation field (monthly inspection) is as follows: the rack 3 and the collimator 4 are rotated to 0 degrees; the front end face of the quality control phantom 1 is placed horizontally, the film is placed horizontally in the first film slot 18, the quality control phantom 1 is adjusted so that the film is placed flat at SDD = 100cm, the collimator width in the X / Y direction is set to 10cm, the current light field position is marked on the film, and then the film is exposed; the collimator width in the X / Y direction is adjusted to 30cm, the current light field position is marked on the film, and it is exposed again; the film is subjected to optical density analysis, and the deviation between the radiation field and the light field boundary position is measured, and the consistency of the light field and the radiation field when the rack is 0 degrees (monthly inspection) can be obtained. Similarly, the rack 3 angle is rotated to 90 degrees / 270 degrees, the front end of the quality control phantom 1 is placed vertically facing the rack direction, and the film is placed vertically in the first film slot 18, and the above operation is repeated to obtain the consistency of the light field and the radiation field when the rack is 90 degrees / 270 degrees (monthly inspection).

[0039] like Figure 3 As shown, the rear end face of the mechanical performance quality control phantom of the multifunctional medical electron linear accelerator, the rear end face of the quality control phantom 1 can measure the rotation concentricity of the collimator (annual inspection) and the rotation concentricity of the treatment bed (annual inspection).

[0040] Among them, the specific detection method of the rotation concentricity of the collimator (annual inspection) is as follows: the rear end face of the quality control phantom 1 is placed horizontally on the accelerator treatment bed 2 with the rear end face facing upward, and the frame 3 and the collimator 4 are rotated to 0 degrees; the film is placed horizontally in the second film slot 19, and the plane where the film is located is SDD = 100 cm, the collimator width in the X direction is set to the minimum achievable width (generally 0.1cm-0.6cm), the collimator width in the Y direction is 30cm, and the collimator angle is rotated to 300 degrees, 330 degrees, 0 degrees, 30 degrees, 60 degrees and 90 degrees respectively, and the film is exposed to light, and a star-shaped field shape appears on the film; the optical density of the film is analyzed to obtain the position of the long axis of each field on the film; the deviation of the radius of the inscribed circle of each long axis intersection in the film from the reference value can be measured to obtain the rotation concentricity of the collimator (annual inspection).

[0041] Among them, the specific detection method of the rotation concentricity (annual inspection) of the treatment bed is as follows: place the rear end face of the quality control phantom 1 horizontally on the accelerator treatment bed 2 with the face facing upward, and rotate the frame 3 and the collimator 4 to 0 degrees; put the film horizontally into the second film slot 19, and make the plane where the film is located at SDD = 100 cm, set the X-direction collimator width to the minimum achievable width (generally 0.1cm-0.6cm), the Y-direction collimator width to 30cm, rotate the treatment bed angle to 300 degrees, 330 degrees, 0 degrees, 30 degrees, 60 degrees and 90 degrees respectively, expose the film, and the film will show a star-shaped field shape; perform optical density analysis on the film to obtain the position of the long axis of each field on the film; measure the deviation of the radius of the inscribed circle of each long axis intersection in the film from the reference value, and the rotation concentricity (annual inspection) of the treatment bed can be obtained.

[0042] like Figure 4 As shown, the left end surface of the mechanical performance quality control phantom 1 of the multifunctional medical electron linear accelerator is provided with a crosshair 14, a level bubble 15 and a digital level 16; the crosshair is set in the middle position of the square on the left end surface; the left end surface of the quality control phantom 1 can measure the pitch and roll angle display accuracy of the treatment bed (pitch: the treatment bed rotates around the X-axis, roll: the treatment bed rotates around the Y-axis).

[0043] Among them, the specific detection method for the accuracy of the pitch angle display of the treatment bed is: place the left end face of the quality control phantom 1 vertically with the frame facing up at 90 degrees, rotate the frame 3 and the collimator 4 to 0 degrees, adjust the bed height to SSD (source to surface distance) = 100 cm, and make the treatment bed 2 pitch ±3 degrees. Observe the deviation between the corresponding digital display value of the treatment bed pitch angle and the actual value, and the accuracy of the treatment bed pitch angle display can be obtained.

[0044] Among them, the specific detection method for the accuracy of the roll angle display of the treatment bed is: place the left end face of the quality control phantom 1 vertically toward the negative direction of the Y axis, rotate the frame 3 and the collimator 4 to 0 degrees, adjust the bed height to SSD = 100 cm, make the treatment bed 2 roll ± 3 degrees, observe the deviation between the corresponding digital display value of the treatment bed roll angle and the actual value, and the accuracy of the treatment bed roll angle display can be obtained.

[0045] like Figure 5 As shown, the right end surface of the mechanical performance quality control phantom 1 of the multifunctional medical electron linear accelerator is provided with a first coordinate plane 17. In this embodiment, the left end surface is specifically a 40cm×40cm coordinate plane. The right end surface of the quality control phantom 1 can measure the accuracy of the movement of the treatment bed in the up-down direction and in-and-out direction (monthly inspection).

[0046] The specific detection method for the accuracy of the up-down and in-out movement of the treatment bed (monthly inspection) is as follows: the frame 3 and the collimator 4 are rotated to 90 degrees, the radiation field size is 30 cm × 30 cm, the bed height is adjusted to SSD = 100 cm, and the treatment bed 2 is moved in the X, Y, and Z directions (such as Figure 1 The position of the quality control phantom 1 is 0, 0, 0; place the quality control phantom 1 on the treatment bed 2, adjust the quality control phantom 1 so that the center cross line of the surface coincides with the laser line, lift the treatment bed 2 (lift and lower by 10cm and 20cm respectively), observe the deviation between the digital display value of the treatment bed 2 position and the actual value, and the accuracy of the treatment bed's up and down movement can be obtained (monthly inspection). Similarly, repeat the above operation, move in and out of the treatment bed (move in and out by 10cm and 20cm respectively), observe the deviation between the digital display value of the treatment bed position and the actual value, and the accuracy of the treatment bed's in and out movement can be obtained (monthly inspection).

[0047] like Figure 6 As shown, the upper end surface of the mechanical performance quality control phantom 1 of the multifunctional medical electron linear accelerator is provided with a second coordinate plane 20, a first film slot position 18, and a second film slot position 19; the first film slot position 18 and the second film slot position 19 are respectively arranged at opposite ends of the second coordinate plane 20. In this embodiment, the second coordinate plane 20 is a coordinate plane with a resolution of 1mm and a length and width of 42cm. The upper end surface of the quality control phantom 1 can measure the accuracy of the jaw in place (daily inspection), the accuracy of the multi-leaf collimator in place (daily inspection), the display accuracy of the treatment bed angle 0 degrees (monthly inspection), and the accuracy of the treatment bed's left and right movement in place (monthly inspection).

[0048] Among them, the specific detection method for the accuracy of the jaw position (daily inspection) is as follows: rotate the angle of the frame 3 and the collimator 4 to 0 degrees, adjust the height of the treatment bed to SSD (source-skin distance) = 100 cm, open the multi-leaf collimator 4 to the maximum position, overlap the center cross line of the upper end face of the quality control phantom 1 with the light field cross line, adjust the unilateral jaw position to 15 cm, 10 cm, 5 cm, 0 cm, -10 cm (or to the opposite side limit position) respectively, observe the deviation between the light field projection position and the corresponding position of the phantom coordinate plane, and the accuracy of the jaw position (daily inspection) can be obtained.

[0049] Among them, the specific detection method for the accuracy of the multi-leaf collimator in place (daily inspection) is: rotate the angle of the frame 3 and the collimator 4 to 0 degrees, adjust the height of the treatment bed to SSD = 100cm, and open the jaws to the maximum position; overlap the center crosshairs of the upper end face of the quality control phantom 1 with the light field crosshairs, adjust the multi-leaf collimators on both sides to 15cm, 10cm, 5cm, 0cm, and -10cm respectively, and observe the deviation between the light field projection position and the coordinate paper position to obtain the accuracy of the multi-leaf collimator in place (daily inspection).

[0050] Among them, the specific detection method for the display accuracy of the treatment bed at 0 degrees (monthly inspection) is as follows: the angle of the frame 3 and the collimator 4 is rotated to 0 degrees, the field size is 30cm×30cm, and the height of the treatment bed is adjusted to SSD=100cm; the center cross line of the upper end face of the quality control phantom 1 is overlapped with the light field cross line, and the position of the current light field cross line on the coordinate paper is marked; 20cm into the bed, the position of the light field cross line is marked again, the positions of the two marked points are connected, and the deviation of the angle between the line and the light field cross line in the Y direction is recorded, and the display accuracy of the treatment bed at 0 degrees (monthly inspection) can be obtained.

[0051] The specific detection method for the accuracy of the left-right movement of the treatment bed (monthly inspection) is as follows: the frame 3 and the collimator 4 are rotated to 0 degrees, the radiation field size is 30cm×30cm, the bed height is adjusted to SSD=100cm, and the treatment bed is moved in the X, Y, and Z directions (such as Figure 1 Place the quality control phantom 1 on the treatment bed 2, adjust the quality control phantom 1 so that the center cross line of the upper end surface coincides with the laser line, move the treatment bed left and right (10 cm and 20 cm respectively), and observe the deviation between the digital display value of the treatment bed position and the actual value, so as to obtain the accuracy of the left and right movement of the treatment bed (monthly inspection).

[0052] like Figure 7As shown, the lower end face of the mechanical performance quality control phantom 1 of the multifunctional medical electron linear accelerator includes a circular protractor 21 and a leveling nut 13, and the circular protractor is arranged in the middle of the lower end face; further preferably, the leveling nuts are preferably four, evenly distributed at the positions near the four vertex corners of the lower end face. Further preferably, a level bubble is also arranged on the lower end face. The lower end face of the quality control phantom 1 can measure the accuracy of the center position of the crosshairs (monthly inspection), the display accuracy of the rotation angle of the treatment bed (monthly inspection), and the concentricity of the rotation of the treatment bed (monthly inspection).

[0053] Among them, the specific detection method of the accuracy of the center position of the crosshairs (monthly inspection) is as follows: the angles of the frame 3 and the collimator 4 are rotated to 0 degrees, the field size is 30cm×30cm, and the height of the treatment bed is adjusted to SSD=100cm; the center crosshairs of the lower end surface of the quality control phantom 1 are overlapped with the crosshairs of the light field, and the collimator angle is rotated to 45 degrees, 90 degrees, 315 degrees, and 270 degrees respectively, and the deviation between the center of the light field crosshairs and the center of the crosshairs on this surface of the phantom is recorded to obtain the accuracy of the center position of the crosshairs (monthly inspection).

[0054] Among them, the specific detection method for the accuracy of the treatment bed rotation angle display (monthly inspection) is: the angle of the frame 3 and the collimator 4 is rotated to 0 degrees, the field size is 30cm×30cm, and the bed height is adjusted to SSD=100cm; the center cross line of the lower end face of the quality control phantom 1 is overlapped with the light field cross line, and the treatment bed angle is rotated to 45 degrees, 90 degrees, 270 degrees, and 315 degrees respectively, until the light field cross line is aligned with the phantom scale line, and the deviation between the corresponding treatment bed angle digital display value, the bed base scale value and the actual value is recorded to obtain the accuracy of the treatment bed rotation angle display (monthly inspection).

[0055] Among them, the specific detection method for the rotation concentricity of the treatment bed (monthly inspection) is: rotate the angle of the frame and the collimator to 0 degrees, the field size is 30cm×30cm, and the bed height is adjusted to SSD=100cm; overlap the center cross line of the phantom surface with the light field cross line, rotate the treatment bed angle to 270 degrees, 300 degrees, 330 degrees, 0 degrees, 30 degrees, 60 degrees, and 90 degrees respectively, and observe the deviation between the center of the light field cross line and the cross center of the phantom surface to obtain the rotation concentricity of the treatment bed (monthly inspection).

[0056] The multifunctional medical electron linear accelerator mechanical property quality control phantom of the utility model integrates multiple quality control functions, thereby reducing the number of different tools and equipment that physicists need to use during the quality control process. The multifunctional quality control phantom is designed to have multiple modules to adapt to different mechanical property quality control needs. By integrating multiple quality control functions into one module, physicists can complete multiple inspection projects through one quality control phantom without switching different quality control equipment. In summary, the multifunctional medical electron linear accelerator mechanical property quality control phantom is a solution that can reduce the number of different tools and equipment used by physicists during the quality control process, simplify the quality control process, improve efficiency, and reduce inconvenience. This will bring many benefits to the quality control work of the accelerator's mechanical properties.

[0057] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0058] In the utility model, a multifunctional medical electron linear accelerator mechanical performance quality control phantom is used to complete multiple daily, monthly and annual inspections of the accelerator's mechanical performance. The use of the utility model can simplify the mechanical quality control process and improve efficiency. In traditional accelerator mechanical performance testing, each test item may require different tools, equipment and operating steps. However, by using the quality control phantom in the utility model, these inspection items can be integrated, thereby simplifying the entire mechanical quality control process.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional medical electron linear accelerator mechanical performance quality control phantom, characterized by: It is a cubic structure, including a front end face, an upper end face, a rear end face, a left end face, a right end face and a lower end face; the upper end face is composed of a number of concentric squares arranged in sequence, the vertical length from the concentric origin to the edge of the innermost square is a reference distance, and the vertical length difference between the edges of the consecutively arranged squares is a reference distance; tungsten balls are arranged on the concentric origin and the four vertices of each of the squares; the upper end face is provided with a second coordinate plane, a first film slot position, and a second film slot position; the first film slot position and the second film slot position are respectively arranged at opposite ends of the second coordinate plane.

2. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 1, characterized in that: In the upper end surface, a tungsten ball is arranged on a side which is a reference distance away from each of the vertices of the square.

3. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 1, characterized in that: The diameter of the tungsten ball is 2 mm.

4. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 1, characterized in that: The second coordinate plane is a coordinate plane with a resolution of 1 mm and a length and width of 42 cm.

5. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 1, characterized in that: The left end surface is provided with a crosshair, a level bubble and a digital level; the crosshair is provided at the center of the square of the left end surface.

6. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 1, characterized in that: The right end surface is provided with a first coordinate plane.

7. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 6, characterized in that: The first coordinate plane is a 40 cm×40 cm coordinate plane.

8. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 1, characterized in that: The lower end surface comprises a circular protractor and a leveling nut, and the circular protractor is arranged at the center position of the lower end surface.

9. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 8, characterized in that: There are four leveling nuts, which are evenly distributed on the lower end surface near the four vertex corners.

10. The multifunctional medical electron linear accelerator mechanical performance quality control phantom according to claim 8, characterized in that: A level bubble is also provided on the lower end surface.

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