Die body device for rapidly detecting performance indexes of accelerator

Abstract

The invention relates to the technical field of medical equipment, in particular to a die body device for rapidly detecting performance indexes of an accelerator, which comprises a cubic die body, the cubic die body comprises a surface part and a die body main body, the die body main body is provided with a central through hole, the die body main body is integrally formed, the surface part is C-shaped, and the central through hole is communicated with the central through hole. The surface part covers the die body main body, the central through hole can be connected with different plug-ins, and a functional mark is arranged on the surface part and is used for detecting registration. The medical accelerator QA tool improves the situation that an existing medical accelerator QA tool is narrow in application range.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a phantom device for rapid detection of accelerator performance indicators. Background Art

[0002] Currently, the performance index testing of medical linear accelerators is aimed at ensuring that the machine performance does not deviate significantly from the benchmark value obtained during acceptance and commissioning, and that this benchmark value is of the highest quality to avoid the transfer of systematic errors to the QA and treatment process. Some benchmark values ​​will be used as input to the treatment planning system to describe and / or model the treatment machine, so the benchmark value may directly affect the calculation of the treatment plan for each patient treated on the machine, and deviation from the benchmark value may result in unsatisfactory treatment for the patient.

[0003] In the related technology, the current machine performance test of medical linear accelerators is divided into daily inspection, monthly inspection, annual inspection and other cycles according to the regular QA plan, and is mainly completed by using a morning inspection instrument in conjunction with various tools. For example, the morning inspection instrument is used to detect the output of the accelerator's beam, the KV / MV imaging module is used to detect the accelerator's KV / MV imaging, and various rulers are used to measure and calibrate parameters such as the consistency of the accelerator's light field and the light field of the combined dose film. The tools used for machine performance testing are numerous, the process is complex, and it takes a lot of time. There is an urgent need to optimize the process to achieve faster and more accurate results.

[0004] The optimization and efficiency of the process of testing the performance indicators of medical accelerators is a trend that has emerged in the market. For example, the globally recognized Penta-Guide phantom of Modus Medical Devices and the MPC phantom for Varian accelerators all achieve the detection of various performance indicators of the accelerator by marking various features on the surface or inside. For example, the cubic Penta-Guide surface has functional markings such as crosshairs pointing to the center, lines indicating the size of the light field, grooves marking the accuracy of the light field, internal cavities for indicating the center of the image shooting, and surface rings. Another example is the MPC phantom suitable for Varian accelerators, whose base is only adapted to the treatment bed of Varian accelerators, and the accelerator performance is also detected by the marking points on the surface. These phantoms, used in conjunction with supporting software, can detect most accelerator performance indicators and achieve the purpose of rapid detection.

[0005] Regarding the above-mentioned related technologies, the accelerator performance testing phantoms currently available on the market are mainly Penta-Guide phantoms and MPC phantoms. Among them, the MPC phantom is a performance testing phantom developed by Varian for its own accelerators, so it is not suitable for other accelerators on the market; the other Penta-Guide phantom has a wide range of applications and good practicality, but its cubic structure limits the expansibility of the phantom's functions, and there is no base to fix it to the treatment bed. The position and level need to be adjusted each time it is used, which makes the operation complicated during the test and the phantom's applicability poor. Summary of the invention

[0006] In order to improve the narrow application scope of existing medical accelerator QA tools, the present application provides a phantom device for rapid detection of accelerator performance indicators.

[0007] The present application provides a phantom device for rapid detection of accelerator performance indicators using the following technical solutions: A phantom device for rapid detection of accelerator performance indicators comprises a cubic phantom, wherein the cubic phantom comprises a surface piece and a phantom body, wherein the phantom body is provided with a central through hole, wherein the phantom body is integrally formed, wherein the cross section of the surface piece is C-shaped, wherein the surface piece covers the phantom body, wherein the central through hole can be connected to different plug-ins, wherein the surface piece is provided with a functional mark, wherein the functional mark is used for detection and registration.

[0008] By adopting the above technical scheme, by improving the integrity of the cubic phantom, by combining the surface parts with the phantom body, the phantom body is made by an integrated molding process, which increases the integrity and precision of the cubic phantom to a certain extent. At the same time, by opening a central through hole on the phantom body, the functional mark and the central through hole cooperate with each other, and the central through hole can be further coordinated with different plug-ins, so that all accelerator inspection items can be completed on one cubic phantom, and full-function coverage of accelerator daily inspection, weekly inspection, monthly inspection and annual inspection items can be achieved. At the same time, the structural components of the cubic phantom are greatly reduced by aligning with the accelerator, and the detection function of the performance indication of the cubic phantom is integrated, which solves the problems of numerous tools and complicated processes in the detection process, and provides more universal and more comprehensive QA phantoms for more hospital radiology departments, and provides important theoretical environment requirements for production detection and scientific research experiments.

[0009] As a preferred embodiment of the present invention, the functional mark includes a cross mark and a field size mark, the cross mark includes a center cross mark and an offset center cross mark, the center cross mark is set at the center of the surface part, and the centers of the center cross mark and the field size mark coincide, and the offset center cross mark is set at the center of the offset model body.

[0010] By adopting the above technical solution, the center cross mark is used as a reference point during detection, which can help medical staff and technicians accurately align the radiation to the detection area, thereby ensuring the accuracy of treatment. The center cross mark cooperates with the field size mark. The center cross mark can accurately indicate the center point of the irradiation field, which helps to achieve more accurate irradiation. At the same time, the field size mark can provide additional irradiation field indication information to help medical staff and technicians better control the shape and size of the irradiation field. There is an offset center cross mark outside the center cross, which provides a treatment bed movement position mark, improves the flexibility of accelerator detection, and enables medical staff to adjust the position of the field according to different situations and positions, so as to achieve the best detection effect. At the same time, the field size mark can ensure that the radiation is accurately irradiated to the predetermined detection area, thereby improving the accuracy and effect of the detection.

[0011] As a preferred solution of the present invention, the functional mark further includes a field accuracy mark, and the field accuracy mark is arranged on a boundary line of the field size mark.

[0012] By adopting the above technical solution, the field size mark can ensure that the radiation accurately irradiates the predetermined detection area, thereby improving the accuracy and effect of the detection; the field accuracy mark is used for verification during the detection process, and is used to mark the exact boundary of the irradiation field, ensuring that the irradiation field of the accelerator completely corresponds to the irradiation field in the treatment plan, thereby further improving the accuracy of radiotherapy. After aligning the lasers on both sides of the accelerator with the crosshairs of the irradiation field through the center cross, the field size mark and the size accuracy mark can be used to check the size and accuracy of the light field, and then the software can be used to shoot X-ray images and CBCT, etc., to check the displacement accuracy of the image center and the treatment bed. At the same time, it can also cooperate with various plug-ins to complete all acceleration inspection items on a three-dimensional model, realizing full functional coverage of the accelerator's daily, weekly, monthly and annual inspection items.

[0013] As a preferred solution of the present invention, a circular arc groove is provided on the side wall of the mold body, and the circular arc groove is arranged concentrically with the center of the mold body.

[0014] As a preferred embodiment of the present invention, the arc groove includes a right arc, a top arc, a left arc and a bottom arc, and the right arc, the top arc, the left arc and the bottom arc are symmetrically arranged respectively, and a pair of indicating grooves are symmetrically opened on the top arc and the left arc along the axis, and the indicating grooves are connected with the top arc and the left arc.

[0015] By adopting the above technical solution, the right arc or the bottom arc can present a unique characteristic image in the accelerator KV image or MV image, and by comparing the position and size relationship with the left arc or the top arc, the shooting direction and angle of the accelerator image can be determined.

[0016] As a preferred solution of the present invention, an embedded cavity mark is provided on the inner wall of the mold body close to the central through hole, and the embedded cavity mark is located inside the top corner of the mold body. There are eight embedded cavity marks in total.

[0017] By adopting the above technical solution, the embedded cavity mark cooperates with the surface mark to quickly align with the accelerator CBCT, reducing the cumbersome detection connection and position determination steps. The embedded cavity mark can cooperate with the functional mark and the central through hole to determine the accuracy of the position of different plug-ins, thereby making the detection effect better. The embedded cavity mark is set at the top corner of the phantom body, which can more accurately detect the accuracy of the connection position of different plug-ins in an all-round way, and at the same time make the detection results more accurate, reduce the steps of repeated adjustments during the connection process, and shorten the detection time.

[0018] As a preferred solution of the present invention, the cubic phantom is connected to a fixed base, the fixed base is used to be connected to the accelerator treatment bed, and a fixed groove is provided on the fixed base, and the fixed groove cooperates with the cubic phantom.

[0019] By adopting the above technical solution, the fixed base can effectively fix the three-dimensional phantom on the treatment bed, thereby ensuring that the position of the three-dimensional phantom relative to the treatment bed remains unchanged each time it is used, thereby increasing the accuracy of each detection of the three-dimensional phantom. The fixed groove can effectively cooperate with the three-dimensional phantom to fix it, effectively increase the stability of the three-dimensional phantom, and further increase the stability and accuracy of the detection.

[0020] As a preferred solution of the present invention, a bottom pad is provided on the side wall of the mold body close to the fixed base, the bottom pad can fit with the fixed groove, and the bottom pad is located at the balance center of the mold body.

[0021] By adopting the above technical solution, during the detection process, the three-dimensional phantom can be used together with the fixed base, and the accelerator can also be detected alone; the base pad can raise the three-dimensional phantom when the three-dimensional phantom is used alone to avoid direct friction between the three-dimensional phantom and the accelerator, and can also cooperate well with the fixed base to limit the displacement of the three-dimensional phantom on the fixed base.

[0022] As a preferred solution of the present invention, the fixed base includes an expandable support leg, the expandable support leg is rotatably connected to the side of the fixed base, and the end of the expandable support leg away from the fixed base is rotatably connected to a fixed elastic pin.

[0023] By adopting the above technical solution, when the cubic phantom needs to be fixed on the accelerator treatment bed, the expandable legs are rotated to expand the expandable legs to a suitable position, and then the fixed spring pins are rotated to insert the fixed spring pins into the accelerator treatment bed and rotated to fix them; the expandable legs can adapt to different treatment beds, so that the three-dimensional phantom has stronger adaptability, higher detection efficiency, and more detection items.

[0024] As a preferred solution of the present invention, a horizontal adjustment knob is provided on the side of the fixed base away from the deployable legs.

[0025] By adopting the above technical solution, the horizontal height of the fixed base can be effectively adjusted by turning the horizontal adjustment knob, so that the three-dimensional model as a whole can reach a horizontal state; the horizontal adjustment knob can quickly and effectively adjust the level of the three-dimensional model, so that the three-dimensional model does not need to consider the level problem during subsequent use.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application sets a surface part and a cubic phantom, covers the surface part on the cubic phantom, improves the integrity of the cubic phantom, combines the surface part with the phantom body, and adopts an integrated molding process to manufacture the phantom body, thereby increasing the integrity of the cubic phantom to a certain extent. At the same time, a central through hole is opened on the phantom body, so that the functional mark and the central through hole cooperate with each other, and the central through hole can cooperate with different plug-ins, so that all accelerator inspection items can be completed on one cubic phantom, and the full-function coverage of the accelerator daily inspection, weekly inspection, monthly inspection and annual inspection items can be achieved. At the same time, the registration with the accelerator greatly reduces the structural components of the cubic phantom, integrates the detection function of the performance indication of the cubic phantom, solves the problem of numerous tools and complex processes in the detection process, and provides more universal and more comprehensive QA phantoms for more hospital radiology departments, providing important theoretical environment requirements for production detection and scientific research experiments; 2. This application sets functional marks, and the center cross mark is used as a reference point during detection, which can help medical staff and technicians accurately align the radiation to the detection area, thereby ensuring the accuracy of treatment. The center cross mark cooperates with the field size mark. The center cross mark can accurately indicate the center point of the irradiation field, which helps to achieve more accurate irradiation. At the same time, the field size mark can provide additional irradiation field indication information to help medical staff and technicians better control the shape and size of the irradiation field. There is an offset center cross mark outside the center cross, which provides a treatment bed movement position mark, improves the flexibility of accelerator detection, and enables medical staff to adjust the position of the field according to different situations and positions, thereby achieving the best detection effect. At the same time, the field size mark can ensure that the radiation is accurately irradiated to the predetermined detection area, thereby improving the accuracy and effect of the detection; the field accuracy mark is used for verification during the detection process, and is used to identify the exact boundary of the irradiation field, ensuring that the irradiation field emitted by the accelerator completely corresponds to the irradiation field in the treatment plan, thereby further improving the accuracy of radiotherapy. After aligning the lasers on both sides of the accelerator with the crosshairs of the irradiation field through the center cross, the size and accuracy of the light field can be checked through the irradiation field size mark and size accuracy mark. Then, X-ray images and CBCT can be taken with the software to check the displacement accuracy of the imaging center and the treatment bed. At the same time, it can also cooperate with various plug-ins to complete all acceleration inspection items on a three-dimensional phantom, realizing full functional coverage of the accelerator daily inspection, weekly inspection, monthly inspection and annual inspection items; 3. The present application sets embedded cavity marks, which cooperate with surface marks to quickly align with the accelerator CBCT, reducing cumbersome detection connection and position determination steps. The embedded cavity marks can cooperate with functional marks and central through holes to determine the accuracy of different plug-in positions, thereby making the detection effect better. The embedded cavity marks are set at the top corners of the phantom body, which can more accurately detect the accuracy of different plug-in connection positions in all directions, and at the same time make the detection results more accurate, reduce the steps of repeated adjustments during the connection process, and shorten the detection time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the phantom device for rapid detection of accelerator performance indicators in Example 1 of the present application.

[0028] Figure 2 It is a structural schematic diagram of the top arc and the left arc of Example 1 of the present application.

[0029] Figure 3 It is a structural schematic diagram of the right arc and the bottom arc of Example 1 of the present application.

[0030] Figure 4 It is a schematic diagram of the structure of the functional mark of Example 1 of the present application.

[0031] Figure 5 It is a schematic diagram of the structure of the embedded cavity mark of Example 1 of the present application.

[0032] Figure 6 It is a schematic diagram of the overall structure of the fixed base of Example 2 of the present application.

[0033] Figure 7 It is a schematic diagram of the bottom structure of the fixed base of Example 2 of the present application.

[0034] Figure 8 It is a schematic diagram of the overall structure of Example 3 of the present application.

[0035] Fig. 9 It is a schematic diagram of the overall structure of Example 4 of the present application.

[0036] Explanation of reference numerals: 1. cubic phantom; 11. surface part; 12. phantom body; 121. center through hole; 13. arc groove; 131. right arc; 132. top arc; 133. left arc; 134. bottom arc; 135. indicator groove; 14. functional mark; 141. center cross mark; 142. offset center cross mark; 143. field size mark; 144. field accuracy mark; 145. embedded cavity mark; 15. bottom pad; 2. fixed base; 21. fixed groove; 22. deployable support leg; 221. rotation hole; 222. fixed spring pin; 23. horizontal adjustment knob; 24. storage slot; 25. fixing rod; 3. phantom CTQA plug-in; 31. cylindrical functional module; 32. counterweight cube; 4. phantom Winston Lutz test rod plug-in; 41. detection plug-in; 42. detection cube; 43. spherical cavity. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-9 This application is described in further detail.

[0038] The embodiment of the present application discloses a phantom device for rapid detection of accelerator performance indicators.

[0039] Example 1 Reference Figure 1 A phantom device for rapid detection of accelerator performance indicators includes a cubic phantom 1 and a fixed base 2; the cubic phantom 1 includes a phantom body 12 and a surface piece 11, the phantom body 12 is an integrally formed arrangement, the cross-section of the surface piece 11 is C-shaped, the surface piece 11 covers the phantom body 12, a central through hole 121 is opened on the cubic phantom 1, the central through hole 121 can be connected to different plug-ins, and a functional mark 14 is set on the surface piece 11, and the functional mark 14 is used for detection and alignment.

[0040] The phantom body 12 is in a square shape as a whole, and a central through hole 121 is opened along the axis of the phantom body 12. The cross section of the central through hole 121 is in a square shape. During the detection process, the stability of the cubic phantom 1 itself is increased, and the stability when connected with other plug-ins during the detection process can also be increased, and the shaking when the phantom body 12 is connected to different plug-ins can be reduced. The central through hole 121 provides a space for placing the plug-in and can ensure that the center of the plug-in coincides with the center of the cubic phantom 1, providing users with additional performance indicator detection functions.

[0041] By improving the integrity of the cubic phantom 1, the surface part 11 is combined with the phantom body 12, and the phantom body 12 is made by an integrated molding process, which greatly increases the integrity of the cubic phantom 1 to a certain extent. At the same time, by opening a central through hole 121 on the phantom body 12, the functional mark 14 and the central through hole 121 cooperate with each other to determine the position. Further, the central through hole 121 can cooperate with different plug-ins, so that all accelerator inspection items can be completed on one cubic phantom 1, and the full function coverage of the accelerator daily inspection, weekly inspection, monthly inspection and annual inspection items can be achieved. At the same time, the structural components of the cubic phantom 1 are greatly reduced by alignment with the accelerator, and the detection function of the performance indication of the cubic phantom 1 can be further integrated, which solves the problem of numerous tools and complicated processes in the detection process, provides more universal and more comprehensive QA phantoms for more hospital radiology departments, and provides important theoretical environment requirements for production detection and scientific research experiments.

[0042] Reference Figure 2 and Figure 3 A circular arc groove 13 is provided on the side wall of the phantom body 12. The circular arc groove 13 is 3 mm deep and 2 mm wide, and is arranged in sections. The circular arc groove 13 is arranged concentrically with the image center. The circular arc groove 13 includes a right circular arc 131, a top circular arc 132, a left circular arc 133 and a bottom circular arc 134. The right circular arc 131, the top circular arc 132, the left circular arc 133 and the bottom circular arc 134 are symmetrically arranged. A pair of indicating grooves 135 are symmetrically provided on the top circular arc 132 and the left circular arc 133 along the axis, and the indicating groove 135 is connected to the top circular arc 132 and the left circular arc 133.

[0043] The right arc 131 or the bottom arc 134 can present a unique characteristic image in the accelerator KV image or MV image, and the shooting direction and angle of the accelerator image can be determined by comparing the position and size relationship with the left arc 133 or the top arc 132; on the KV / MV image, the direction of the accelerator image when shooting (0°, 90°, 108°, 270°) can be determined by the inner and outer positions of different arc segments, and the angle deviation can be calculated by the center positions of the large and small arcs on the image.

[0044] Reference Figure 1 and Figure 4 The surface piece 11 is 5 mm thick and covers the top surface and two side surfaces of the mold body 12 . The surface piece 11 is closely matched with the mold body 12 , and the arc groove 13 is hidden under the surface piece 11 , thereby ensuring that the indication center of the functional mark 14 on the surface piece 11 coincides with the center of the mold body 12 .

[0045] The functional mark 14 is used to detect whether the center of the phantom body 12 coincides with the center of the accelerator or other machinery, and the functional mark 14 is set on the top surface, left side surface and right side surface of the phantom body 12. The functional mark 14 includes a cross mark, a field size mark 143 and a field accuracy mark 144; the cross mark includes a center cross mark 141 and an offset center cross mark 142, and the center cross mark 141 is set at the center of the surface part 11, and the center of the center cross mark 141 and the field size mark 143 coincide. The offset center cross mark 142 is set 1 cm away from the center of the phantom body 12 (all three axes of xyz are offset by 1 cm). The offset center cross mark 142 can indicate the specified position of the treatment bed's movement, and is used to determine the accuracy of the subsequent treatment bed after automatic return; the field size mark 143 is composed of 5*5cm, 10*10cm and 15*15cm wireframes. When the center of the phantom body 12 coincides with the mechanical center of the accelerator, the field size mark 143 can accurately indicate the size of the light field opened by the accelerator; the field accuracy mark 144 is set in a groove and is set on the boundary of the field size mark 143, and the 5*5cm and 10*10cm field size marks 143 correspond to field accuracy marks 144 with widths of 1mm and 2mm respectively. The field accuracy mark 144 can determine whether the light field accuracy deviation is less than 1mm or 2mm according to the position of the wide field boundary shadow.

[0046] The center cross mark 141 is used as a reference point during detection, which can help medical staff and technicians accurately align the radiation to the detection area, thereby ensuring the accuracy of treatment. The center cross mark 141 cooperates with the field size mark 143. The center cross mark 141 can accurately indicate the center point of the irradiation field, which helps to achieve more accurate irradiation. At the same time, the field size mark 143 can provide additional irradiation field indication information to help medical staff and technicians better control the shape and size of the irradiation field. There is an offset center cross mark 142 outside the center cross, which provides a mark for the movement position of the treatment bed, improves the flexibility of accelerator detection, and enables medical staff to adjust the position of the field according to different situations and positions, thereby achieving the best detection effect. At the same time, the field size mark 143 can ensure that the radiation is accurately irradiated to the predetermined detection area, thereby improving the accuracy and effect of the detection; the field accuracy mark 144 is used for verification during the detection process, used to mark the accurate boundary of the irradiation field, and ensure that the irradiation field emitted by the accelerator completely corresponds to the irradiation field in the treatment plan, thereby further improving the accuracy of radiotherapy. After aligning the lasers on both sides of the accelerator with the crosshairs of the irradiation field through the center cross, the light field size and accuracy can be checked through the irradiation field size mark 143 and the size accuracy mark. Then, X-ray images and CBCT can be taken with the software to check the displacement accuracy of the imaging center and the treatment bed. At the same time, it can also cooperate with various plug-ins to complete all acceleration inspection items on a three-dimensional model, realizing full functional coverage of the accelerator's daily, weekly, monthly and annual inspection items.

[0047] The center cross mark 141 serves as a reference point during detection, which can help medical staff and technicians accurately align the treatment radiation to the detection area, thereby ensuring the accuracy of treatment; at the same time, the offset center cross mark 142 can provide additional irradiation field indication information to help medical staff and technicians better control the shape and size of the irradiation field. The offset center cross mark 142 improves the flexibility of accelerator detection, allowing medical staff to adjust the position of the radiation field according to different situations and positions, thereby achieving the best detection effect. At the same time, the radiation field size mark 143 can ensure that the radiation is accurately irradiated to the predetermined detection area, thereby improving the accuracy and effect of detection.

[0048] Reference Figure 5 An embedded cavity mark 145 is provided on the inner wall of the mold body 12 near the central through hole 121. The embedded cavity is an embedded cavity mark 145 with a diameter of 1 cm and a height of 1 cm. The embedded cavity mark 145 is located inside the top corner of the mold body 12 and is arranged parallel to the axial direction of the mold body 12. There are eight embedded cavity marks 145 in total.

[0049] The embedded cavity mark 145 cooperates with the surface mark to quickly align with the accelerator CBCT, reducing the cumbersome detection connection and position determination steps. The embedded cavity mark 145 can cooperate with the functional mark 14 and the central through hole 121 to determine the accuracy of the positions of different plug-ins, thereby making the detection effect better. The embedded cavity mark 145 is set at the top corner of the phantom body 12, which can more accurately detect the accuracy of the connection positions of different plug-ins in all directions, and at the same time make the detection results more accurate, reduce the steps of repeated adjustments during the connection process, and shorten the detection time.

[0050] The implementation principle of a phantom device for rapid detection of accelerator performance indicators in an embodiment of the present application is as follows: in the process of detecting the accelerator performance indicators, the three-dimensional phantom 1 is first placed stably, and the plug-in is inserted into the central through hole 121. The central through hole 121 can ensure the stability of the plug-in connection, and the embedded cavity mark 145 determines the accuracy of the plug-in connection position. In the process of detection, the functional mark 14 and the arc groove 13 can ensure the accuracy and stability of the detection data.

[0051] Example 2 The present invention provides a phantom device for rapid detection of accelerator performance indicators. Except for the fixed base 2, the other structures of this embodiment are consistent with those of embodiment 1, and will not be described in detail here. Specifically, Reference Figure 6 and Figure 7 The fixed base 2 is used to fix the cubic phantom 1. The fixed base 2 is detachably connected to the cubic phantom 1. The fixed base 2 can be connected to the accelerator treatment bed. A fixing groove 21 is provided on the fixed base 2. A bottom pad 15 is provided at the bottom of the phantom body 12. The bottom pad 15 is arranged in a rectangular boss. The bottom pad 15 is used to cooperate with the fixing groove 21, so that the fixing groove 21 cooperates with the cubic phantom 1.

[0052] The fixed base 2 can effectively fix the three-dimensional phantom on the treatment bed, thereby ensuring that the position of the three-dimensional phantom relative to the treatment bed remains unchanged each time it is used, thereby increasing the accuracy of each detection of the three-dimensional phantom. At the same time, during the detection process, the three-dimensional phantom can be used together with the fixed base 2, and the accelerator can also be detected alone; the bottom pad 15 can raise the three-dimensional phantom when the three-dimensional phantom is used alone to avoid direct friction between the three-dimensional phantom and the accelerator, and can also cooperate well with the fixed base 2 to limit the displacement of the three-dimensional phantom on the fixed base 2.

[0053] The fixed base 2 includes an expandable leg 22 and a horizontal adjustment knob 23. The expandable leg 22 is rotatably connected to the side of the fixed base 2. A storage groove 24 is provided on the side wall of the fixed base 2 away from the three-dimensional model and parallel to the axial direction. The storage groove 24 is used to store the expandable leg 22. A fixing rod 25 is fixedly connected to the side of the storage groove 24. A rotating hole 221 is provided at the end of the expandable leg 22. The fixing rod 25 is penetrated through the rotating empty hole. The expandable leg 22 can be rotated and expanded on the fixed base 2 with the fixing rod 25 as the axis. Two expandable legs 22 are symmetrically arranged along the axis of the fixed base 2; the end of the expandable leg 22 away from the rotating hole 221 is rotatably connected to a fixed spring pin 222, and the expandable leg 22 is threadedly connected to the fixed spring pin 222.

[0054] The fixed base 2 is adapted to the accelerator treatment bed. The deployable legs 22 on both sides of the fixed base 2 can be rotated and deployed to rotatably fix the elastic pins 222 to fix the fixed base 2 on the accelerator treatment bed. The deployable legs 22 can adapt to different treatment beds, making the three-dimensional model more adaptable, with higher detection efficiency and more detection items.

[0055] The horizontal adjustment knob 23 is connected to the side wall of the fixed base 2 away from the deployable legs 22 , and two horizontal adjustment knobs 23 are symmetrically arranged along the axis of the fixed base 2 .

[0056] After the first horizontal adjustment of the fixed base 2, it is only necessary to insert the fixed spring pin 222 into the same hole on the accelerator treatment bed to determine the same position without subsequent leveling. The horizontal adjustment knob 23 can effectively adjust the level of the three-dimensional phantom, so that the three-dimensional phantom does not need to consider the level problem during subsequent use.

[0057] The implementation principle of a phantom device for rapid detection of accelerator performance indicators in an embodiment of the present application is as follows: in the process of rapid detection of the performance indicators of the accelerator, the three-dimensional phantom is first fixed on the accelerator treatment bed by the deployable legs 22 on the fixed base 2, and then the horizontal adjustment knob 23 is used to adjust the horizontal level; during the detection process, the plug-in is inserted into the central through hole 121, and the embedded cavity mark 145 can cooperate with the functional mark 14 to quickly confirm the position.

[0058] Example 3 The present invention provides an application of a phantom device for rapid detection of accelerator performance indicators. The other structures of this embodiment are consistent with those of Embodiment 1 or Embodiment 2, and will not be described in detail herein. Specifically, Reference Figure 8The phantom CTQA plug-in 3 is composed of a cylindrical functional module 31 with a diameter of 12 cm and a height of 10 cm and a 12*12*20 cm counterweight cube 32. The counterweight cube 32 is inserted into the central through hole 121 and fits tightly with the central through hole 121. The cylindrical functional module 31 supports CT scanning uniformity measurement and multi-CT value measurement (6 material rods with a diameter of 2 cm and a length of 2 cm are evenly distributed on a circumference of a diameter of 6 cm) (the functional part can be changed according to needs to adapt to various CTQA needs). The counterweight cube 32 contains a cavity of 10*10*18 cm, which supports CTQA without affecting the mechanical QA function of the phantom itself.

[0059] Example 4 The present invention provides an application of a phantom device for rapid detection of accelerator performance indicators. The other structures of this embodiment are consistent with those of Embodiment 1 or Embodiment 2, and the weight cube 32 in this embodiment is consistent with that in Embodiment 3, which will not be described in detail here. Specifically, Reference Fig. 9 The phantom Winston lutz test rod plug-in 4 includes a detection plug-in 41 adapted to the ionization chamber plug-in jack, with a diameter of 1 cm and a total length of 20 cm (the available length is 10 cm, which can be changed according to needs), and a detection cube 42 with a length, width and height of 2 cm at the end. There is a cross mark at the center of the surface of the detection cube 42, and there is a 5mm diameter spherical cavity 43 inside. The spherical cavity 43 can be used for Winston lutz accelerator mechanical isocenter and radiation isocenter tests.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A phantom device for rapid detection of accelerator performance indicators, comprising a cubic phantom (1), characterized in that: The cubic phantom (1) comprises a surface piece (11) and a phantom body (12); a central through hole (121) is provided on the phantom body (12); the phantom body (12) is integrally formed; the cross section of the surface piece (11) is C-shaped; the surface piece (11) covers the phantom body (12); the central through hole (121) is used for connecting with different plug-ins; a functional mark (14) is provided on the surface piece (11); and the functional mark (14) is used for detecting alignment.

2. A phantom device for rapid detection of accelerator performance indicators according to claim 1, characterized in that: The functional mark (14) includes a cross mark and a field size mark (143), the cross mark includes a central cross mark (141) and an offset central cross mark (142), the central cross mark (141) is arranged at the center of the surface part (11), and the centers of the central cross mark (141) and the field size mark (143) coincide with each other, and the offset central cross mark (142) is arranged offset from the center of the phantom body (12).

3. A phantom device for rapid detection of accelerator performance indicators according to claim 2, characterized in that: The functional mark (14) further includes a field accuracy mark (144), and the field accuracy mark (144) is arranged on the boundary line of the field size mark (143).

4. A phantom device for rapid detection of accelerator performance indicators according to claim 1, characterized in that: A circular arc groove (13) is provided on the side wall of the mold body (12), and the circular arc groove (13) is arranged concentrically with the center of the mold body (12).

5. A phantom device for rapid detection of accelerator performance indicators according to claim 4, characterized in that: The arc groove (13) comprises a right circular arc (131), a top circular arc (132), a left circular arc (133) and a bottom circular arc (134); the right circular arc (131), the top circular arc (132), the left circular arc (133) and the bottom circular arc (134) are symmetrically arranged respectively; a pair of indicating grooves (135) are symmetrically provided on the top circular arc (132) and the left circular arc (133) along an axis; the indicating grooves (135) are connected to the top circular arc (132) and the left circular arc (133).

6. A phantom device for rapid detection of accelerator performance indicators according to claim 5, characterized in that: An embedded cavity mark (145) is provided on the inner wall of the mold body (12) close to the central through hole (121), and the embedded cavity mark (145) is located inside the top corner of the mold body (12). There are eight embedded cavity marks (145) in total.

7. A phantom device for rapid detection of accelerator performance indicators according to claim 1, characterized in that: The cubic phantom (1) is connected to a fixed base (2), the fixed base (2) is used to be connected to an accelerator treatment bed, and the fixed base (2) is provided with a fixed groove (21), the fixed groove (21) cooperates with the cubic phantom (1).

8. A phantom device for rapid detection of accelerator performance indicators according to claim 7, characterized in that: A bottom pad (15) is provided on the side wall of the mold body (12) close to the fixed base (2); the bottom pad (15) can fit into the fixed groove (21); and the bottom pad (15) is located at the balance center of the mold body (12).

9. A phantom device for rapid detection of accelerator performance indicators according to claim 7, characterized in that: The fixed base (2) comprises an expandable support leg (22), the expandable support leg (22) being slidably connected to the side of the fixed base (2), and the end of the expandable support leg (22) away from the fixed base (2) is rotatably connected to a fixed elastic pin (222).

10. A phantom device for rapid detection of accelerator performance indicators according to claim 9, characterized in that: A horizontal adjustment knob (23) is provided on the side of the fixed base (2) away from the deployable support leg (22).

Images