Multifunctional proton therapy quality control die body
By designing a multifunctional proton therapy quality control phantom, integrating phantom components and accelerator components, and utilizing laser positioning lines and charge-coupled device cameras, the precise verification of proton beam parameters was achieved. This solved the problems of complexity and insufficient precision in existing quality control methods, and improved the working efficiency and measurement accuracy of the proton therapy system.
Patent Information
- Application Number
- CN202422882003.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-11-26
AI Technical Summary
Existing proton therapy quality control methods are complex and lengthy, making it difficult to simultaneously and accurately verify multiple key parameters of the proton beam. Furthermore, existing equipment has limited functionality, measurement accuracy, and repeatability, failing to meet the comprehensive quality assurance requirements of proton therapy systems.
A multifunctional proton therapy quality control phantom is designed, comprising a phantom assembly, a proton therapy bed, and an accelerator assembly. It integrates modules A, B, C, and D, and utilizes a laser positioning line and a high-sensitivity charge-coupled device camera to achieve precise verification of multiple parameters through multi-angle proton beam irradiation and scintillation fluorescence measurement.
It simplifies the quality control process of proton therapy systems, improves work efficiency, enhances measurement accuracy and repeatability, and is applicable to a variety of proton quality control projects.
Smart Images
Figure CN223774183U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of radiotherapy equipment, and particularly relates to a multifunctional proton therapy quality control phantom. BACKGROUND
[0002] Proton therapy is an advanced radiotherapy technique that uses protons (positively charged hydrogen nuclei) instead of traditional X-rays to treat cancer. Compared with X-rays, protons have higher energy and more precise radiation delivery capabilities, which enable them to more accurately target tumors and reduce damage to surrounding healthy tissues.
[0003] Existing proton therapy quality control methods face many challenges. Traditional quality control processes are complex and lengthy, often requiring multiple devices and cumbersome steps to verify different parameters, resulting in low work efficiency. At the same time, existing technologies are difficult to accurately verify multiple key parameters of proton beam flow at the same time, such as the consistency of the range under different energies, the center of the radiation field, and the center of the machine, as well as the consistency of the proton beam isocenter and the image isocenter. In addition, existing quality control devices have single functions, insufficient measurement accuracy and repeatability, and are difficult to meet the needs of comprehensive quality assurance of proton therapy systems. These problems seriously hinder the further development and clinical application of proton therapy. Therefore, developing a multifunctional quality control phantom that can simplify the quality control process, improve work efficiency, enhance measurement accuracy and repeatability, and be suitable for various proton quality control projects has become a pressing problem in the field of proton therapy. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a multifunctional proton therapy quality control phantom to solve the problems raised in the background.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] A multifunctional proton therapy quality control phantom, comprising a phantom assembly, a proton therapy bed and an accelerator assembly, the phantom assembly comprising an A module, a B module, a C module and a D module, the A module being installed on one side of the B module, one side of the C module being connected to the other side of the B module, the D module being connected to the other side of the C module, and a high-density metal ball being arranged in the center of the D module; the accelerator assembly comprising a rotating support and a fixed support, an accelerator being installed on one side of the rotating support, and the accelerator being used for emitting a proton beam.
[0007] As a further scheme of the utility model: the phantom assembly is placed on the proton therapy bed, and a support table is arranged at the bottom of the proton therapy bed.
[0008] As a further scheme of the utility model: the rotating support is rotatably installed on the fixed support, and a driving motor for controlling rotation of the rotating support is installed on the fixed support.
[0009] As a further scheme of the utility model: the B module, the C module and the D module are all provided with a laser positioning line, and the laser positioning line comprises a horizontal laser positioning line and a vertical laser positioning line which are perpendicular to each other.
[0010] As a further scheme of the utility model: the A module comprises a charge coupled device camera and a signal processing module.
[0011] As a further scheme of the utility model: the diameter of the high-density metal ball is 2.5mm.
[0012] As a further scheme of the utility model: the B module is used for measuring the range of the proton beam under different energies, and the first preset angle reached by the rotating support in the measuring process of the range of the proton beam under different energies is 0°, 90°, 180° and 270° in sequence.
[0013] As a further scheme of the utility model: the C module is a radiation field isocenter and mechanical isocenter consistency verification module, and the second preset angle reached by the rotating support in the radiation field isocenter and mechanical isocenter consistency verification process is 0°, 30°, 60°, 90°, 300° and 330° in sequence.
[0014] Compared with the prior art, the utility model has the beneficial effects that: the utility model simplifies the quality control process of the proton therapy system, significantly improves the quality control work efficiency, compared with the traditional method, the utility model not only integrates multiple quality control functions, reduces the equipment switching and operation steps, but also improves the measurement accuracy and repeatability. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 Structure diagram of multifunctional proton therapy quality control phantom Figure 1 .
[0016] Figure 2 Structure diagram of multifunctional proton therapy quality control phantom Figure 2 .
[0017] Figure 3 Structure diagram of the phantom assembly in the multifunctional proton therapy quality control phantom.
[0018] Figure 4 Schematic view of the proton beam irradiation B module in the multifunctional proton therapy quality control phantom.
[0019] Figure 5 Schematic view of the proton beam irradiation C module in the multifunctional proton therapy quality control phantom.
[0020] Figure 6 Structure diagram of D module in multifunctional proton therapy quality control phantom.
[0021] Figure 7 Light intensity distribution function of scintillation fluorescence when B module is irradiated by a proton beam in the multifunctional proton therapy quality control phantom.
[0022] Figure 8 Line segment diagram generated when C module is irradiated by a proton beam in the multifunctional proton therapy quality control phantom.
[0023] In the figure: 10-phantom assembly, 11-A module, 12-B module, 121-laser positioning line, 1211-horizontal laser positioning line, 1212-vertical laser positioning line, 13-C module, 14-D module, 20-proton therapy bed, 21-supporting table, 30-rotating support, 31-accelerator, 40-fixed support, 41-driving motor. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0025] Please refer to Figures 1-3 In the embodiments of the present application, a multifunctional proton therapy quality control phantom comprises a phantom assembly 10, a proton therapy bed 20 and an accelerator assembly. The phantom assembly 10 is placed on the proton therapy bed 20. The bottom of the proton therapy bed 20 is provided with a supporting table 21. The supporting table 21 can rotate and move, so as to adjust the position of the proton therapy bed 20. It should be noted that the supporting table 21 and the proton therapy bed 20 are prior art, which will not be described here in the present embodiment. The phantom assembly 10 comprises an A module 11, a B module 12, a C module 13 and a D module 14. The A module 11 is installed on one side of the B module 12. One side of the C module 13 is connected to the other side of the B module 12. The D module 14 is connected to the other side of the C module 13. The accelerator assembly comprises a rotating support 30 and a fixed support 40. An accelerator 31 is installed on one side of the rotating support 30. The accelerator 31 is used for emitting a proton beam. The rotating support 30 is rotatably installed on the fixed support 40. A driving motor 41 for rotating the rotating support 30 is installed on the fixed support 40.
[0026] Further, in the embodiment of the present application, the B module 12, the C module 13 and the D module 14 are all provided with a laser positioning line 121, which includes a horizontal laser positioning line 1211 and a vertical laser positioning line 1212 perpendicular to each other.
[0027] In the embodiment of the present application, the A module 11 includes a charge-coupled device (CCD) camera and a signal processing module, the charge-coupled device (CCD) camera is used to collect high-precision images, and the signal processing module is used to process data.
[0028] The B module 12 is a proton beam range verification module, in the embodiment, the B module 12 is a cuboid scintillator detector, and the B module 12 is used to accurately measure the range of the proton beam under different energies, for example, as shown in the figure, the method for measuring the range of the proton beam under different energies includes the following steps: Figure 4
[0029] S101, place the phantom assembly 10 on the proton treatment bed 20, adjust the positions of the proton treatment bed 20 and the phantom assembly 10, so that the horizontal laser positioning line 1211 / vertical laser positioning line 1212 of the B module 12 of the phantom assembly 10 coincides with the laser line of the indoor fixed laser positioning system;
[0030] S102, adjust the position of the rotating support 30, so that the position of the rotating support 30 reaches a first preset angle, the accelerator 31 emits a proton beam to irradiate the B module 12, and the rays excite scintillation fluorescence in the B module 12;
[0031] It should be noted that in the embodiment of the present application, in the method for measuring the range of the proton beam under different energies, the first preset angles reached by the rotating support 30 are 0°, 90°, 180° and 270° in turn;
[0032] S103, the high-sensitivity charge-coupled device camera of the A module 11 captures the fluorescence generated in the B module 12, and accurately records the fluorescence shape and intensity distribution; the signal processing module of the A module 11 processes the fluorescence data, fits the light intensity distribution function of the fluorescence data in the B module 12, to obtain the range of the proton beam, that is, as shown in the figure, the range data is compared with the preset reference value, to evaluate the range accuracy of the proton beam under different energies at different first preset angles. Figure 7
[0033] As shown in the figure, in the embodiment of the present application, the C module 13 is a radiation field isocenter and mechanical isocenter consistency verification module, in the embodiment, the C module 13 is a circular ring scintillator detector, which is used to ensure the spatial accuracy of the treatment system, and the specific method includes the following steps: Figure 5
[0034] S201, adjust the positions of the proton treatment couch 20 and the phantom assembly 10, so that the horizontal laser positioning line 1211 / vertical laser positioning line 1212 of the C module 13 of the phantom assembly 10 coincides with the laser line of the indoor fixed laser positioning system;
[0035] S202, adjust the position of the rotating support 30, so that the position of the rotating support 30 reaches a second preset angle, the accelerator 31 emits a proton beam to irradiate the C module 13, and the ray excites scintillation fluorescence on the C module 13;
[0036] It should be noted that in the embodiments of the present application, the second preset angles reached by the rotating support 30 are 0°, 30°, 60°, 90°, 300° and 330° in turn;
[0037] S203, the high-sensitivity charge-coupled device camera of the A module 11 captures the scintillation fluorescence incident on and emitted from the surface of the C module 13, and accurately records the shape and intensity distribution thereof; the signal processing module of the A module 11 processes the fluorescence data, calculates the center coordinates of each fluorescence spot, connects the center coordinates of the incident and emitted beam spots at the same preset angle to generate six representative line segments. The signal processing module identifies the intersection points of the six representative line segments, and fits a minimum circle, i.e., as shown in the figure, the center of the circle accurately locates the isocenter of the proton beam field, and the radius of the circle quantifies the consistency deviation of the isocenter of the proton beam field and the mechanical isocenter. Figure 8
[0038] Please refer to Figure 6 In the embodiments of the present application, the D module 14 is a proton beam isocenter and image isocenter consistency verification module, in the embodiments, the D module 14 is a cylinder, and a high-density metal ball 141 with a diameter of 2.5 mm is arranged at the center of the D module 14, which is used to evaluate the consistency of the proton beam field isocenter and the image isocenter, and ensure the accuracy of the treatment positioning. The method for evaluating the consistency of the proton beam field isocenter and the image isocenter comprises the following steps:
[0039] S301, adjust the positions of the proton treatment couch 20 and the phantom assembly 10, so that the horizontal laser positioning line 1211 / vertical laser positioning line 1212 of the D module 14 of the phantom assembly 10 coincides with the laser line of the indoor fixed laser positioning system;
[0040] S302, perform cone beam CT scanning on the D module 14 to obtain the CT image of the D module 14. It should be noted that in the CT image data of the D module 14, the position of the high-density metal ball 141 is clear and identifiable, and the ball center position defines the image isocenter of the cone beam CT scanning;
[0041] S303, the D module 14 is irradiated with a proton beam emitted by the accelerator 31 at the center of the proton radiation field, and the scintillation fluorescence is excited in the D module 14, and the high-sensitivity charge-coupled device camera of the A module 11 captures the position of the scintillation fluorescence excited by the D module 14;
[0042] S303, the signal processing module of the A module 11 quantitatively evaluates the consistency of the center of the proton radiation field and the center of the image according to the positional deviation between the center of the shadow (corresponding to the center of the high-density metal ball 141, i.e., the center of the image) and the center of the proton beam dose profile (the position of the scintillation fluorescence).
[0043] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be regarded as limiting the claims to which they relate.
[0044] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. A multi-functional proton therapy quality control phantom comprising a proton therapy couch (20) and an accelerator assembly, characterized in that, The application further comprises a phantom assembly (10), which comprises an A module (11), a B module (12), a C module (13) and a D module (14), the A module (11) is installed on one side of the B module (12), one side of the C module (13) is connected with the other side of the B module (12), and the D module (14) is connected with the other side of the C module (13), and a high-density metal ball (141) is arranged at the center of the D module (14); the accelerator assembly comprises a rotating support (30) and a fixed support (40), one side of the rotating support (30) is installed with an accelerator (31), and the accelerator (31) is used for emitting a proton beam.
2. The multi-functional proton therapy quality control phantom of claim 1, wherein, The phantom assembly (10) is placed on a proton treatment bed (20), and the bottom of the proton treatment bed (20) is provided with a support table (21).
3. The multi-functional proton therapy quality control phantom of claim 1, wherein, The rotating support (30) is rotatably installed on the fixed support (40), and the fixed support (40) is installed with a driving motor (41) for controlling the rotation of the rotating support (30).
4. The multi-functional proton therapy quality control phantom of claim 1, wherein, The B module (12), the C module (13) and the D module (14) are all provided with laser positioning lines (121), and the laser positioning lines (121) comprise horizontal laser positioning lines (1211) and vertical laser positioning lines (1212) which are perpendicular to each other.
5. The multi-functional proton therapy quality assurance phantom of claim 1, wherein, The A module (11) comprises a charge coupled device camera and a signal processing module.
6. The multi-functional proton therapy quality control phantom of claim 1, wherein, The diameter of the high-density metal ball (141) is 2.5 mm.
7. The multi-functional proton therapy quality control phantom of claim 3, wherein, The B module (12) is used for measuring the range of the proton beam under different energies, and in the process of measuring the range of the proton beam under different energies, the first preset angle reached by the rotating support (30) is 0°, 90°, 180° and 270° in sequence.
8. The multi-functional proton therapy quality control phantom of claim 3, wherein, The C module (13) is a radiation field isocenter and mechanical isocenter consistency verification module, and in the process of radiation field isocenter and mechanical isocenter consistency verification, the second preset angle reached by the rotating support (30) is 0°, 30°, 60°, 90°, 300° and 330° in sequence.