Static three-dimensional water tank for BNCT midpoint dose measurement

Abstract

The utility model discloses a static three-dimensional water tank for BNCT midpoint dose measurement, which comprises a three-dimensional water tank, a static measurement device is arranged on the three-dimensional water tank, and a plurality of thermoluminescent sheet detectors for measuring multi-point dose in the three-dimensional water tank are arranged on the static measurement device. According to the static three-dimensional water tank for BNCT midpoint dose measurement, TLD is conveniently taken and placed through the static measurement device, accurate measurement of particles is completed, metering of multiple points in the water tank can be simultaneously measured in cooperation with a TLD detector, time can be saved, particle irradiation time can be shortened, and measurement of multiple positions can be completed at a time; the problem that a dynamic water tank is not suitable for multi-point measurement is solved. The problem that a dynamic three-dimensional water tank is not applicable is solved; the dosage of multiple point locations in the three-dimensional water tank can be measured at the same time in cooperation with TLD, and compared with single-point-location measurement of a dynamic three-dimensional water tank, the particle irradiation time can be shortened, and the detection efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a static three-dimensional water tank equipped with a thermoluminescent film for verifying the accuracy of the dose distribution of a BNCT beam outlet, and in particular to a static three-dimensional water tank for BNCT midpoint dose measurement. Background Art

[0002] A 3D radiotherapy water tank is a crucial tool for calibrating and verifying radiation dose distribution during radiotherapy. It is often used to verify the dose calculation accuracy of radiotherapy planning systems, ensuring that patients receive the precise dose during radiotherapy. Radiation therapy for cancer is a cancer treatment method that uses focused radiation to kill tumor cells. Radiation (neutrons, protons, photons, heavy ions, etc.) is invisible to the naked eye and requires the use of an ionization chamber and a 3D water tank. Quantitative measurement of radiation using a 3D water tank is essential for ensuring accurate radiation therapy doses.

[0003] In clinical radiotherapy, the 3D scanning water tank is filled with a test liquid that simulates the internal tissues of the human body. During the commissioning or quality control testing of radiotherapy equipment (accelerator), it serves as an important quality control device for data collection or verification of various irradiation field conditions of the radiotherapy equipment. During measurement, the 3D water tank scans the radiation field at the center or reference point of the treatment equipment to measure the 3D dose distribution in the water. This is used for data collection, commissioning or quality control testing of the treatment planning system of the radiotherapy equipment.

[0004] During boron neutron capture therapy (BNCT), TPS system validation testing requires data acquisition and processing based on various detection methods, followed by comparison with the treatment planning system. Neutron detection is generally performed using ionization chamber, thermoluminescence, and activation methods. Thermoluminescence and activation methods are both offline measurements, requiring subsequent data inference and processing. The ionization chamber method utilizes online measurement and can acquire data in real time. This detection was performed using thermoluminescence.

[0005] Thermoluminescent dosimeters (TLDs) are a tool used to measure radiation dose. They are made of materials that store radiation energy. When these materials are exposed to radiation, they store some of this energy. Later, by heating the materials, they release this stored energy. The resulting light can be measured to determine the radiation dose received.

[0006] In radiotherapy, three-dimensional dynamic scanning and three-dimensional static scanning are two different technologies, which differ in the choice of detectors. Three-dimensional dynamic scanning is a technology for real-time monitoring and analysis of beam lines. Due to its dynamic nature, it requires more complex detectors and data processing systems. Based on this, three-dimensional dynamic scanning is not suitable for using traditional thermoluminescence detectors (TLDs) because TLD detectors usually require data reverse reading after irradiation and are not suitable for real-time monitoring. This is determined by the structural characteristics of the three-dimensional dynamic three-dimensional water tank.

[0007] TLD detectors require post-irradiation readings and are not suitable for real-time monitoring. They are more suitable for static dose measurement rather than dynamic monitoring. Therefore, a static three-dimensional water tank suitable for TLD detection was designed for BNCT midpoint dose measurement. Utility Model Content

[0008] The purpose of the utility model is to solve the problem that three-dimensional dynamic scanning is not suitable for using traditional thermoluminescence detectors (TLDs), and to design a static three-dimensional water tank based on TLD detectors, which is suitable for static three-dimensional water tanks, can realize multi-point dose measurement, can reduce particle irradiation time, and improve detection efficiency. The static three-dimensional water tank is used for BNCT midpoint dose measurement. The static three-dimensional water tank does not need to be designed with a motion module, and there is no motion module blocking the static three-dimensional water tank, which makes it more convenient to take and place the TLD, and can measure the three-dimensional dose distribution of neutrons and gamma particles in the three-dimensional water tank, and can obtain three-dimensional dot matrix dose values.

[0009] The technical solution employed by the present invention to achieve its purpose is: a static three-dimensional water tank for BNCT midpoint dose measurement, comprising a three-dimensional water tank, a static measuring device disposed on the three-dimensional water tank, and a plurality of thermoluminescent detectors mounted on the static measuring device for measuring doses at multiple points within the three-dimensional water tank. This static three-dimensional water tank for BNCT midpoint dose measurement is designed based on the characteristics of TLD detectors. By disposing a static measuring device and a plurality of thermoluminescent detectors on the static measuring device, the thermoluminescent detectors can measure doses at multiple points within the three-dimensional water tank. After the measurement is completed, the static measuring device can conveniently remove and place the TLD to achieve precise particle measurement. In conjunction with the TLD detector, multiple points within the water tank can be measured simultaneously, saving time and reducing particle irradiation time, allowing measurements of multiple locations to be completed simultaneously. This offline testing method yields higher particle accuracy, which can be compared and verified with the results of dynamic water tank detection. This solves the problem that dynamic water tanks are not suitable for multi-point measurement.

[0010] Preferably, the static measurement device includes side brackets, a support beam movably positioned on the side brackets, and a positioning plate fixed to the support beam and movable with the support beam. To facilitate measurement and placement of the TLD detector, the static measurement device can be connected to the three-dimensional water tank by providing a side bracket, and the support beam is used to achieve a movably positioned connection with the side bracket. A positioning plate can be connected to the support beam, and multiple thermoluminescent detectors can be bonded to the positioning plate to achieve multi-point dose measurement.

[0011] Preferably, the thermoluminescent detectors are bonded to the surface of the positioning plate at a certain distance. The placement of the thermoluminescent detectors on the positioning plate can be designed according to measurement needs, as long as they can meet the purpose and needs of multi-point measurement.

[0012] Preferably, the side brackets are provided with a plurality of positioning members, and the support beams are provided with movable positioning structures that cooperate with the positioning members. As a preferred solution, the positioning members provided on the side brackets facilitate the rapid movement and repositioning of the support beams, thereby facilitating the measurement of dosages at multiple points and different locations within the three-dimensional water tank, thereby achieving more accurate measurements.

[0013] Preferably, the side brackets are provided with positioning structures for connection to the three-dimensional water tank. The positioning structures are provided to facilitate connection and positioning between the side brackets and the three-dimensional water tank. Specifically, the positioning structures may be positioning surfaces, positioning slots, or other structures that facilitate connection and positioning. The specific configuration may be based on the three-dimensional water tank structure.

[0014] Preferably, the support beam is provided with a positioning plate fixing structure. The positioning plate fixing structure is provided on the support beam to facilitate the fixed connection between the positioning plate and the support beam. The positioning plate fixing structure can be a plurality of positioning plate fixing holes, a plug-in slot, a snap-fit ​​structure, etc., with the convenience of fixing the positioning plate and the support beam as the design standard.

[0015] Preferably, at least one supporting beam is provided, and a positioning plate is provided on each supporting beam. According to measurement needs, multiple supporting beams can be provided, and a positioning plate is provided on each supporting beam, so that multi-point measurement at different positions can be achieved.

[0016] Preferably, each positioning plate is equipped with several thermoluminescent detectors for measuring the dose at multiple points within the three-dimensional water tank. By placing multiple positioning plates with multiple thermoluminescent detectors within the three-dimensional water tank, and by changing the positions of the TLD detectors, a three-dimensional dot matrix of dose can be generated. This allows for simultaneous dose measurement at multiple points within the tank, effectively reducing exposure time and improving measurement accuracy.

[0017] Preferably, the open end of the three-dimensional water tank is provided with a bracket connection structure, which cooperates with the positioning structure on the side bracket to achieve the connection between the side bracket and the three-dimensional water tank.

[0018] Preferably, the static measurement device includes a movable positioning plate; the thermoluminescent detectors are bonded to the surface of the positioning plate at predetermined intervals. Alternatively, the static measurement device can be implemented directly using a movable positioning plate, with the thermoluminescent detectors mounted on the positioning plate. During use, the positioning plate can be placed in a three-dimensional water tank to enable multi-point measurement.

[0019] Preferably, the three-dimensional water tank is provided with a positioning plate connection structure. To ensure the accuracy of static measurement and facilitate the connection between the positioning box and the three-dimensional water tank, a plurality of slots can be provided at the bottom or open end of the three-dimensional water tank. When in use, the positioning plate can be positioned by inserting the positioning plate into the slot. Multiple positioning plates can also be inserted into different slots as needed to achieve multi-point measurement at different locations.

[0020] Preferably, each side of the three-dimensional water tank is provided with a laser centerline and a water level line. The laser centerline is used to align the three-dimensional water tank with the central beam line of the collimator beam outlet. The water level line is adjusted primarily for visually observing the water level scale position of the three-dimensional water tank.

[0021] The beneficial effects of the present invention are as follows: the static three-dimensional water tank used for BNCT midpoint dose measurement is designed based on the characteristics of the TLD detector. The static measuring device can conveniently take and place the TLD to complete the precise measurement of particles. In conjunction with the TLD detector, it can simultaneously measure the dosage of multiple points in the water tank, which can save time, reduce the time of particle irradiation, and complete the measurement of many positions at one time; this offline testing method can obtain higher particle accuracy, and compare and verify the results of dynamic water tank detection. It solves the problem that dynamic water tanks are not suitable for multi-point measurement. It solves the problem that dynamic three-dimensional water tanks are not applicable; in conjunction with TLD, the dose of multiple points in the three-dimensional water tank can be measured simultaneously. Compared with the single-point measurement of the dynamic three-dimensional water tank, it can reduce the particle irradiation time and improve the efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a structural schematic diagram of a static three-dimensional water tank used for BNCT midpoint dose measurement.

[0023] Figure 2 It is a structural schematic diagram of the three-dimensional water tank in the utility model.

[0024] Figure 3 It is a schematic diagram of a connection structure between the supporting crossbeam and the fixed plate in the utility model.

[0025] Figure 4 This is a structural diagram of the supporting crossbeam, the fixing plate and the thermoluminescent film detector thereon in the utility model.

[0026] Figure 5 It is a structural schematic diagram of the side bracket in the utility model.

[0027] Figure 6 This is a schematic structural diagram of the side bracket from another angle in the utility model.

[0028] Figure 7 It is a structural schematic diagram of the supporting beam in the utility model.

[0029] Figure 8 It is a structural schematic diagram of the supporting beam in the utility model from another angle.

[0030] Figure 9 This is a structural schematic diagram of a static three-dimensional water tank used for BNCT midpoint dose measurement in Example 2 of the present utility model.

[0031] Figure 10 This is a schematic structural diagram of multiple fixed plates and thermoluminescent detectors thereon in Example 2 of the present utility model.

[0032] Figure 11 This is a structural diagram of the side bracket in Example 2.

[0033] Figure 12 This is a structural schematic diagram of a static three-dimensional water tank used for BNCT midpoint dose measurement in Example 3 of the present utility model.

[0034] In the figure: 1. 3D water tank, 11. Water tank bottom, 12. Water tank side, 13. Water tank opening, 14. Laser centerline, 15. Water level line, 16. Bracket fixing holes;

[0035] 2. Static measurement device, 3. Thermoluminescence detector;

[0036] 4. Side bracket, 41. Step positioning table, 42. Positioning hole, 43. Mounting hole, 44. Card slot;

[0037] 5. Support beam, 51. Beam fixing portion, 52. Positioning plate fixing portion, 53. Fixing surface, 54. U-shaped groove, 55. Positioning plate surface, 56. Positioning plate fixing hole, 57. Card slot;

[0038] 6. Positioning plate, 61. Hook;

[0039] 7. Positioning piece, 8. Mobile positioning structure, 9. Card slot. DETAILED DESCRIPTION

[0040] The various aspects of the present invention are described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0041] Example 1:

[0042] exist Figure 1 、 Figure 2 、 Figure 3 In the embodiment shown, a static three-dimensional water tank for BNCT midpoint dose measurement includes a three-dimensional water tank 1, a static measuring device 2 is provided on the three-dimensional water tank 1, and a plurality of thermoluminescent film detectors 3 for measuring multi-point doses in the three-dimensional water tank are provided on the static detection bracket 2.

[0043] The static measuring device 2 is matched and set according to the specifications and sizes of the three-dimensional water tank 1.

[0044] The static measuring device 2 includes a side bracket 4, a supporting beam 5 movably positioned on the side bracket 4, and a positioning plate 6 fixed on the supporting beam 5 and moving with the supporting beam 5. The thermoluminescent film detectors 3 are evenly distributed on the surface of the positioning plate 5 at a certain distance.

[0045] In another embodiment, the thermoluminescent detectors 3 are arranged on the surface of the positioning plate 6 at a certain distance and may not be evenly distributed. Alternatively, the thermoluminescent detectors 3 may be distributed in a certain regular pattern or in a certain shape.

[0046] The side bracket 4 is arranged on the three-dimensional water tank 1 and fixedly connected to the three-dimensional water tank 1. The side bracket 4 is provided with a positioning piece 7. The supporting beam 5 is provided with a movable positioning structure 8 corresponding to the positioning piece 7. The supporting beam 5 spans the side brackets 4 on both sides. The positioning plate 6 is arranged on the supporting beam 5 and is vertically arranged inside the three-dimensional water tank 1. The positioning plate 6 is preferably made of aluminum plate. Of course, plates of other suitable materials can also be selected. The positioning plate 6 is mainly used for bonding the thermoluminescent film detector 3.

[0047] The specifications of various 3D water tanks 1 are designed based on the location and depth of the patient's lesion. Non-metallic materials such as PMMA are preferred for 3D water tanks 1. Polymethyl methacrylate (PMMA) is a highly transparent polymer, also known as acrylic or organic glass. The 3D water tanks contain a liquid, such as water, that simulates human internal tissue. The term "3D water tank" is simply a name for a container that holds liquids and is not limited to water tanks; other types of containers can be used.

[0048] The three-dimensional water tank 1 is a cubic structure and is provided with a water tank bottom 11, four water tank sides 12 and a water tank opening 13 on the top.

[0049] The four sides 12 of the three-dimensional water tank 1 are each provided with a laser centerline 14 and a water level line 15. The water level line 15 is located near the tank opening 13. The laser centerline 14 is used to facilitate alignment of the central beam line at the collimator's beam outlet. The water level line 15 is primarily used to visually observe the water level scale position of each size of the three-dimensional water tank.

[0050] The side brackets 4 are provided in pairs, one set at the upper end surface of each of the two opposing sides 12 of the water tank. The open end of the three-dimensional water tank is provided with a bracket connection structure. In this embodiment, the bracket connection structure is provided in the form of bracket fixing holes 16 provided on the upper end surface of the side surface 12 of the water tank.

[0051] The side bracket 4 is set according to the side length of the three-dimensional water tank. The specific shape of the side bracket 4 can be not limited as long as it does not affect the use of the three-dimensional water tank. The side bracket is provided with a positioning structure for connecting with the three-dimensional water tank.

[0052] like Figure 5 、 Figure 6 As shown, in this embodiment, the side bracket 4 is arranged in a strip-shaped plate structure. The positioning structure is a stepped positioning platform 41 provided on the side bracket 4 and a plurality of positioning holes 42 provided on the stepped positioning platform 41. The stepped positioning platform 41 overlaps the upper end surface of the water tank side 12 and is fixed to the three-dimensional water tank 1 via fasteners provided in the positioning holes 42 and the bracket fixing holes 16. The side bracket is provided with a plurality of mounting holes 43 on the side away from the three-dimensional water tank, and the positioning member 7 is disposed within the mounting holes 43.

[0053] In this embodiment, the positioning members 7 are positioning pins. The positioning pins are used to position the side supports 4 and the support beam 5. Multiple support beams 5 can be provided using a number of positioning pins, that is, multiple positioning plates 6 can be provided. These positioning plates 6 can move with the support beams 5. By moving the multiple positioning plates 6, the thermoluminescent detector 3 can be positioned differently, thereby obtaining a three-dimensional dot matrix of the dose.

[0054] The support beam 5 is used to securely connect the positioning plate 6 and drive the positioning plate 6 to achieve positional movement. Therefore, the specific structure of the support beam 5 is not limited, as long as it can achieve the desired positional fixation and facilitate movement and repositioning of the positioning plate 6. The support beam is provided with a positioning plate fixing structure. This positioning plate fixing structure comprises a positioning plate surface 55 provided on the support beam and positioning plate fixing holes 56 provided on the positioning plate surface.

[0055] For the convenience of description, in this embodiment, Figure 7 、 Figure 8As shown, the supporting crossbeam 5 is an overall U-shaped long strip structure provided with a crossbeam fixing portion 51 and a positioning plate fixing portion 52. The crossbeam fixing portion 51 is provided with a fixing surface 53, and the movable positioning structure 8 is provided on the fixing surface 53. In this embodiment, the movable positioning structure 8 is provided with a positioning pin hole, and the positioning pin hole is provided in conjunction with the positioning pin. The positioning plate fixing portion 52 includes a U-shaped groove 54 and a positioning plate surface 55. The U-shaped groove 54 is arranged opposite to the positioning plate surface 55. The U-shaped groove 54 is provided with a plurality of positioning plate fixing holes 56 that pass through the positioning plate surface 55. The aluminum plate is attached to the positioning plate surface 55 and is arranged vertically. The aluminum plate is locked and fixed to the supporting crossbeam 5 by fasteners provided in the positioning plate fixing holes 56. The positioning plate 6 can be moved within the three-dimensional water tank 1 by moving the supporting crossbeam 5, thereby moving the position of the thermoluminescent film detector 3.

[0056] like Figure 4 As shown, the thermoluminescent detectors 3 are evenly distributed on the surface of the aluminum plate and are located inside the liquid of the three-dimensional water tank 1 when in use, so as to achieve the requirement of simultaneous measurement of multiple points, and can also realize the movement and replacement of measurement points.

[0057] During specific use, first, the thermoluminescent detector 3 is glued and fixed to the surface of the positioning plate 6 with glue, and arranged at a certain interval. The process of gluing each positioning plate 6 to the thermoluminescent detector 3 needs to be completed outside the three-dimensional water tank 1. Then, the positioning plate 6 and the supporting beam 5 to which the thermoluminescent detector 3 is glued are connected and fixed using hexagon socket bolts, and then the supporting beam 5 is placed on the positioning piece 7 on the side bracket 4 at the corresponding position according to the measurement position for positioning. The detection structure assembly of the thermoluminescent detector 3 in the static three-dimensional water tank can be completed.

[0058] The support beam 5 and the positioning plate 6 can be replaced each time detection is performed without the obstruction of the motion module. The multi-point measurement of the thermoluminescent detector 3 does not require the cooperation of the motion module. It can be completed with just one water tank that can position the thermoluminescent detector 3 to obtain the three-dimensional dose distribution inside the water tank. This offline testing method can obtain higher particle accuracy and compare and verify the results of dynamic water tank detection.

[0059] Example 2:

[0060] exist Figure 9 、 Figure 10 In the embodiment shown, a static three-dimensional water tank for BNCT midpoint dose measurement includes a three-dimensional water tank 1, a static measuring device 2 is provided on the three-dimensional water tank 1, and a plurality of thermoluminescent film detectors 3 for measuring multi-point dosage in the three-dimensional water tank are provided on the static detection bracket 2.

[0061] The static measuring device 2 is matched and set according to the specifications and sizes of the three-dimensional water tank 1.

[0062] The static measuring device 2 includes a side bracket 4, a supporting beam 5 movably positioned on the side bracket 4, and a positioning plate 6 fixed on the supporting beam 5 and moving with the supporting beam 5. The thermoluminescent film detectors 3 are evenly distributed on the surface of the positioning plate 5 at a certain distance.

[0063] In this embodiment, multiple supporting beams 5 are placed inside the three-dimensional water tank 1, and a positioning plate 6 is installed on each supporting beam 5. Many positioning plates 6 can be placed through the multiple supporting beams 5, and by replacing the different positions of the thermoluminescent film detector 3, a three-dimensional dot matrix of the dose can be obtained, so there is no need to move the motion module. In conjunction with the thermoluminescent film detector 3, the dose of multiple points in the three-dimensional water tank can be measured simultaneously. Compared with the single-point measurement of the dynamic three-dimensional water tank, the irradiation time can be reduced.

[0064] In this embodiment, the thermoluminescent detectors 3 are bonded in a matrix on the positioning plate 6. The thermoluminescent detectors 3 on each positioning plate 6 can be arranged in the same pattern or in different patterns.

[0065] The side bracket 4 is arranged on the three-dimensional water tank 1 and fixedly connected to the three-dimensional water tank 1. A plurality of positioning parts 7 are provided on the side bracket 4. A movable positioning structure 8 is provided on the corresponding positioning parts 7 on the support beam 5. The support beam 5 spans the side brackets 4 on both sides. The positioning plate 6 is arranged on the support beam 5 and vertically arranged inside the three-dimensional water tank 1. The positioning plate 6 is preferably made of aluminum plate. Of course, plates of other suitable materials can also be selected. The positioning plate 6 is mainly used for bonding the thermoluminescent film detector 3.

[0066] The specifications of various 3D water tanks 1 are designed based on the location and depth of the patient's lesion. Non-metallic materials such as PMMA are preferred for the 3D water tanks 1. Polymethyl methacrylate (PMMA) is a high-molecular-weight polymer, also known as acrylic or organic glass, and is highly transparent. The 3D water tanks contain a liquid, such as water, that simulates human internal tissue. The term "3D water tank" is simply a name for a container that holds liquid and is not limited to water tanks; other types of containers can be used. In this embodiment, the 3D water tanks are 200 mm in diameter.

[0067] The three-dimensional water tank 1 is a cubic structure and is provided with a water tank bottom 11, four water tank sides 12 and a water tank opening 13 on the top.

[0068] The four sides 12 of the three-dimensional water tank 1 are each provided with a laser centerline 14 and a water level line 15. The water level line 15 is located near the tank opening 13. The laser centerline 14 is used to facilitate alignment of the central beam line at the collimator's beam outlet. The water level line 15 is primarily used to visually observe the water level scale position of each size of the three-dimensional water tank.

[0069] The side brackets 4 are provided in pairs, one set at the upper end of each opposing side of the water tank 12. The open end of the three-dimensional water tank is provided with a bracket connection structure. The bracket connection structure comprises a top plug-in surface on the side of the water tank and bracket fixing holes 16 provided on the top plug-in surface of the side of the water tank 12.

[0070] The side bracket 4 is set according to the side length of the three-dimensional water tank. The specific shape of the side bracket 4 can be not limited as long as it does not affect the use of the three-dimensional water tank. The side bracket is provided with a positioning structure for connecting with the three-dimensional water tank.

[0071] like Figure 11 As shown, in this embodiment, the side bracket 4 is arranged in a strip-shaped plate structure. The positioning structure is a slot 44 provided on the side bracket 4 and a plurality of positioning holes 42 provided within the slot 44. The slot 44 is fixed to the upper end surface of the water tank side 12 and is fixed to the three-dimensional water tank 1 by fasteners provided within the positioning holes 42 and the bracket fixing holes 16. The side bracket is provided with a plurality of mounting holes 43 on the side away from the three-dimensional water tank, and the positioning member 7 is disposed within the mounting holes 43.

[0072] The supporting beam 5 is used to fix the positioning plate 6 and drive the positioning plate 6 to move. Therefore, the specific structure of the supporting beam 5 is not limited, as long as it can fix the positioning plate 6 and facilitate movement and replacement. A positioning plate fixing structure is provided on the supporting beam. In this embodiment, the positioning plate fixing structure adopts a card slot 57. Correspondingly, a hook 61 is provided on the positioning plate 6. When in use, the positioning plate is inserted into the card slot 57 from above and positioned on both sides of the card slot 57 by the hook provided on the upper part of the positioning plate, thereby realizing the positioning of the positioning plate.

[0073] The thermoluminescent detectors 3 are evenly distributed on the surface of the aluminum plate and are located inside the liquid of the three-dimensional water tank 1 when in use, so as to achieve the requirement of simultaneous measurement of multiple points and also enable the measurement points to be moved and replaced.

[0074] During specific use, first, the thermoluminescent detector 3 is glued and fixed to the surface of the positioning plate 6 with glue, and arranged at a certain distance to form a matrix structure. The process of gluing each positioning plate 6 to the thermoluminescent detector 3 needs to be completed outside the three-dimensional water tank 1, and then the positioning plate 6 and the supporting beam 5 to which the thermoluminescent detector 3 is glued are connected and fixed using hexagon socket bolts, and then the supporting beam 5 is placed on the positioning piece 7 on the side bracket 4 at the corresponding position according to the measurement position for positioning, and the detection structure assembly of the thermoluminescent detector 3 in the static three-dimensional water tank can be completed.

[0075] The support beam 5 and the positioning plate 6 can be replaced each time detection is performed. At the same time, the three-dimensional water tank 1 can be equipped with multiple support beams 5, that is, many positioning plates 6 can be placed. By replacing the different positions of the thermoluminescent film detector 3, a three-dimensional dot matrix of the dose can be obtained, so there is no need to move the motion module. In conjunction with the thermoluminescent film detector 3, the dose of multiple points in the three-dimensional water tank can be measured at the same time. Compared with the single-point measurement of the dynamic three-dimensional water tank, the irradiation time can be reduced.

[0076] The three-dimensional structure of the static three-dimensional water tank used for BNCT midpoint dose measurement can be used to complete the precise measurement of particles. In conjunction with the thermoluminescent film detector 3, multiple points in the three-dimensional water tank can be measured simultaneously. Compared with the dynamic three-dimensional water tank, which uses detector measurement as the unit, a lot of time can be saved. This can reduce the time of particle irradiation, because the thermoluminescent film detector 3 is bonded to the positioning plate, and measurements of many positions can be completed at one time.

[0077] Example 3:

[0078] exist Figure 12 The illustrated embodiment employs a technical solution substantially identical to that of Examples 1 and 2, differing in that the static measurement device comprises only a movable positioning plate 6; the thermoluminescent detector 3 is bonded to the surface of positioning plate 6 at a predetermined distance. The static measurement device can be implemented directly using a movable positioning plate, with the thermoluminescent detector mounted on the positioning plate. During use, the positioning plate is placed in a three-dimensional water tank to enable multi-point measurement.

[0079] The bottom of the three-dimensional water tank 1 is provided with a positioning plate connection structure. This positioning plate connection structure is a slot 9 provided at the bottom of the three-dimensional water tank 1. Through this slot, the positioning plate 6 can be directly inserted into the interior of the three-dimensional water tank for multi-point measurement. In another embodiment, a plurality of slots can be provided at the open end of the three-dimensional water tank. During use, the positioning plate can be positioned by inserting the positioning plate into the slot. Alternatively, multiple positioning plates can be inserted into different slots to achieve multi-point measurement at different locations as needed.

[0080] The static three-dimensional water tank used for BNCT midpoint dose measurement in the above embodiment is designed to have no obstruction from the motion module, while the multi-point measurement of the thermoluminescent detector 3 does not require the cooperation of the motion module. It can be completed with only one three-dimensional water tank that can position the thermoluminescent detector 3 to obtain the three-dimensional dose distribution inside the three-dimensional water tank. This offline testing method obtains higher particle accuracy, which is compared and supported by the results of the dynamic three-dimensional water tank detection.

[0081] This static three-dimensional water tank used for BNCT midpoint dose measurement mainly protects the structural design of the static three-dimensional water tank to meet the requirements of simultaneous multi-point measurement; it solves the problem that the dynamic three-dimensional water tank is not suitable for multi-point measurement because the dynamic three-dimensional water tank has modules and is not suitable for occasions where TLD detection is frequently replaced.

[0082] The static three-dimensional water tank used for BNCT midpoint dose measurement does not have a dynamic motion guide rail, so the three-dimensional water tank is also a static three-dimensional water tank. There is no motion module blocking the static three-dimensional water tank, and the multi-point measurement of TLD does not require the cooperation of a motion module. Only a three-dimensional water tank that can hold TLD is needed. The purpose is to cooperate with TLD to measure the three-dimensional dose distribution in the water tank. The static water tank with multi-layer aluminum plate is more convenient to take and place TLD than the three-dimensional dynamic water tank, and can measure neutrons and gamma particles. During the experiment, just glue the TLD to the aluminum plate, and the aluminum plate is divided into multiple layers in the three-dimensional water tank, so that the three-dimensional dot matrix dose value can be obtained. The detector can only measure one point at a time, and TLD can place multiple points at the same time, so in terms of the three-dimensional water tank structure, there is no need for a motion module.

[0083] In existing neutron capture therapy, it is necessary to detect the dose of particles such as photons and neutrons. The online measurement of neutron beam dose using the ionization chamber method is not very accurate, so offline measurement using the thermoluminescence method is needed to support the detection results, and the two results need to be compared.

[0084] Offline and online particle dose measurement complement each other in quality control and dose measurement during radiotherapy. Static three-dimensional water tanks are primarily used for precise dose measurement and verification, and are suitable for dose distribution analysis under static conditions. Dynamic three-dimensional water tanks, on the other hand, enable real-time monitoring and analysis of dynamic changes in the radiation beam, making them suitable for applications requiring real-time feedback, such as intensity-modulated radiotherapy. Combining these two technologies allows for a more comprehensive assessment of radiotherapy equipment performance and treatment outcomes, thereby improving treatment accuracy and safety. This complementary approach enables more precise dose control during radiotherapy, helping to optimize treatment plans and minimize damage to normal tissue.

[0085] The above-mentioned specific embodiments / examples are specific embodiments of the present invention and are used to illustrate the concept of the present invention. They are all illustrative and exemplary and should not be construed as limiting the embodiments and scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the disclosure of the specification. These technical solutions, including any obvious replacements and modifications of the embodiments described herein, are all within the scope of protection of the present invention.

Claims

1. A static three-dimensional water tank for BNCT midpoint dose measurement, characterized by: The invention comprises a three-dimensional water tank (1), a static measuring device (2) is arranged on the three-dimensional water tank (1), and a plurality of thermoluminescent film detectors (3) for measuring the dose at multiple points in the three-dimensional water tank are arranged on the static measuring device (2).

2. The static three-dimensional water tank for BNCT midpoint dose measurement according to claim 1, characterized in that: The static measuring device (2) comprises a side bracket (4), a supporting beam (5) movably positioned on the side bracket (4), and a positioning plate (6) fixed on the supporting beam (5) and moving with the supporting beam (5).

3. The static three-dimensional water tank for BNCT midpoint dose measurement according to claim 2, characterized in that: The thermoluminescent sheet detectors (3) are bonded to the surface of the positioning plate (6) at a certain distance.

4. The static three-dimensional water tank for BNCT midpoint dose measurement according to claim 2, characterized in that: The side bracket (4) is provided with a plurality of positioning members (7), and the supporting crossbeam (5) is provided with a movable positioning structure (8) that matches the positioning members (7).

5. The static three-dimensional water tank for BNCT midpoint dose measurement according to claim 2, characterized in that: The side bracket (4) is provided with a positioning structure for achieving connection with the three-dimensional water tank (1); and the supporting crossbeam (5) is provided with a positioning plate fixing structure.

6. The static three-dimensional water tank for BNCT midpoint dose measurement according to any one of claims 2 to 5, characterized in that: At least one supporting crossbeam (5) is provided, and a positioning plate (6) is provided on each supporting crossbeam (5); and each positioning plate (6) is provided with a plurality of thermoluminescent detectors (3) for measuring the dose at multiple points in the three-dimensional water tank.

7. The static three-dimensional water tank for BNCT midpoint dose measurement according to any one of claims 2 to 5, characterized in that: The open end of the three-dimensional water tank (1) is provided with a bracket connection structure.

8. The static three-dimensional water tank for BNCT midpoint dose measurement according to claim 1, characterized in that: The static measuring device (2) includes a movable positioning plate (6); the thermoluminescent sheet detector (3) is bonded to the surface of the positioning plate (6) at a certain distance.

9. The static three-dimensional water tank for BNCT midpoint dose measurement according to claim 8, characterized in that: The three-dimensional water tank (1) is provided with a positioning plate connection structure.

10. The static three-dimensional water tank for BNCT midpoint dose measurement according to any one of claims 1 to 5, characterized in that: Each side of the three-dimensional water tank (1) is provided with a laser center line (14) and a water level line (15).

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