Device for measuring particle radiotherapy beam depth dose distribution

Abstract

The utility model discloses a device for measuring the beam depth dose distribution of particle radiotherapy, and relates to the field of particle radiotherapy, the device for measuring the beam depth dose distribution of particle radiotherapy comprises a bottom plate, a mounting frame fixed on the bottom plate, and a shell fixed on the bottom plate, a cavity is formed in the mounting frame, and the shell is internally provided with a cavity. A cavity is formed in the bottom plate and used for containing a detection plate, a pressing plate is arranged on the side, away from the bottom plate, of the mounting frame, the detection plate is fixed in the cavity through the pressing plate, the two ends of the pressing plate are bent and are each provided with a first hole, the two sides of the mounting frame are each provided with a second hole used in cooperation with the first hole, and a plug connector is arranged between the pressing plate and the mounting frame. And the plug connector penetrates through the first hole and the second hole and is used for fixing the pressing plate and the mounting frame. When the detection plate needs to be maintained or expanded, only the pressing plate needs to be detached from the mounting frame, and a new detection plate is placed in the mounting frame.

Description

Technical Field

[0001] The present application relates to the field of particle radiotherapy, and in particular to a device for measuring the depth dose distribution of a particle radiotherapy beam. Background Art

[0002] The typical method for measuring the depth dose distribution of charged particle beams uses two large-area flat-plate ionization chambers in conjunction with an automated water tank. This method uses a precision stepper motor to drive the flat-plate ionization chambers through water, measuring the absorbed dose at various water depths and generating the proton depth dose distribution. The equipment used to measure the depth dose distribution of particle radiotherapy beams is subject to maintenance or expansion.

[0003] After searching the world patent document with the publication number: WO2016181534A1, the characteristic of the patented device is that the eight-layer detector array is fixed in a support frame through a thick C-shaped opening support frame, and then the multiple support frame modules are positioned and connected in series using longer alignment pins, thereby achieving the purpose of multi-layer detector stacking.

[0004] After searching the U.S. patent document with publication number: US2016236347A1, it was found that the characteristic of this patented device is that the charge collection plates and the high-voltage plates are stacked alternately, the high-voltage plates and the signal plates are separated by four insulators, and the high-voltage plates, insulators and signal plates are stacked by bolts to form a detector array.

[0005] Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: the traditional multi-layer detector adopts an array method of connecting multiple detection plates in series with a single bolt, and the detection plates are easily damaged when being removed from or installed on the bolts. Utility Model Content

[0006] In order to improve the problem that the detection plate is easily damaged when the device for measuring the depth dose distribution of a particle radiotherapy beam is removed from or installed on the bolt, the present application provides a device for measuring the depth dose distribution of a particle radiotherapy beam.

[0007] The present application provides a device for measuring the depth dose distribution of a particle radiotherapy beam using the following technical solutions:

[0008] A device for measuring the depth dose distribution of a particle radiotherapy beam comprises a base plate, a mounting frame fixed to the base plate, an electronics board fixed to a side of the mounting frame away from the base plate, and a housing fixed to the base plate. A cavity is formed inside the mounting frame, the cavity is used to place a detection plate, an adjustment member is provided in the cavity, a pressure plate is provided on a side of the mounting frame away from the base plate, the pressure plate fixes the detection plate in the cavity, the two ends of the pressure plate are bent and each has a first hole, the two sides of the mounting frame each have a second hole used in conjunction with the first hole, a connector is provided between the pressure plate and the mounting frame, the connector passes through the first hole and the second hole, and the connector is used to fix the pressure plate to the mounting frame.

[0009] By adopting the above technical solution, when the detection plate is damaged, the connector is disassembled in a direction away from the installation frame, the pressure plate is disassembled in a direction away from the bottom plate, and then the damaged detection plate is taken out from the installation frame in a direction away from the bottom plate, and then a new detection plate is placed vertically into the installation frame along the inner wall of the installation frame, and the pressure plate is fixed to the installation frame through the connector, thereby completing the replacement of the damaged detection plate; when the detection plate needs to be expanded, the pressure plate is taken out in a direction away from the bottom plate, and then the adjustment member is moved in a direction away from the detection plate, and a new detection plate is placed vertically in the installation frame, and the pressure plate is fixed to the installation frame through the connector, thereby completing the expansion of the detection plate. Compared with the device of the prior art in which the detection plate is fixed in series with multiple detection plates by a single bolt, when removing the detection plate, multiple detection plates need to be removed from a single bolt, and the detection plate may be damaged during the removal process. The present application fixes the detection plate in the installation frame by a pressure plate. When the detection plate needs to be repaired or expanded, it is only necessary to remove the pressure plate and then remove the detection plate in the installation frame, which solves the problem in the prior art that the detection plate is easily damaged when being removed or installed from the bolts.

[0010] Optionally, the connector includes a first latch and a first spring, one end of the first spring is fixed to the latch, the other end of the first spring is fixed to the mounting frame, and the first latch passes through the first hole and is plugged into the second hole.

[0011] By adopting the above technical solution, when the detection plate needs to be repaired or expanded, the first pin is removed in the direction away from the installation frame, and the pressure plate is removed in the direction away from the bottom plate, so that the detection plate can be repaired and expanded. By removing the first pin to remove the pressure plate, the operation steps are simplified and the bolts connected in series on the detection plate in the prior art are prevented from damaging the detection plate.

[0012] Optionally, the connector is a first bolt, and the first bolt is threadedly connected in the first hole and the second hole.

[0013] By adopting the above technical solution, the pressure plate and the mounting frame are fixed by the first bolt, so that the detection plate is fixed in the mounting frame. When the detection plate needs to be repaired or expanded, the first bolt is removed in the direction away from the mounting frame, and the pressure plate is removed in the direction away from the bottom plate. The detection plate in the mounting frame can be repaired or expanded, preventing damage to the detection plate during the removal process.

[0014] Optionally, the pressure plate includes a first plate bent at one end and a second plate bent at one end and sliding inside the first plate, the first hole at one end of the pressure plate is located at the bent end of the first plate, the first hole at the other end of the pressure plate is located at the bent end of the second plate, the first plate is integrally formed with a first protrusion in the opposite direction of the bending, the second plate is integrally formed with a second protrusion in the opposite direction of the bending, a second spring is arranged between the first protrusion and the second protrusion, one end of the second spring is fixed on the first protrusion, and the other end of the second spring is fixed on the second protrusion.

[0015] By adopting the above technical solution, in the initial state, the second spring pulls the first plate and the second plate together, so that the connector is tightly inserted into the first hole and the second hole. When the detection plate needs to be repaired or expanded, the connector is removed in the direction away from the installation frame, the first plate is slid in the direction away from the second plate, and then the pressure plate is removed from the installation frame. Then, the detection plate in the installation frame is repaired or expanded, preventing the bolts connected in series on the detection plate in the existing equipment from damaging the detection plate during the disassembly process, making the operation steps simpler.

[0016] Optionally, the connector is a second plug, one end of the second plug is fixed in the first hole, and the second plug passes through the first hole and is plugged into the second hole.

[0017] By adopting the above technical solution, the second pin passes through the first hole and is inserted into the second hole. In the initial state, the second spring locks the second pin in the second hole. During the disassembly process, the second pin is removed in the direction away from the mounting frame, and the second plate is slid in the direction away from the first plate to remove the pressure plate, making it easier for the operator to remove the pressure plate.

[0018] Optionally, the adjusting member is a baffle, the edge of the baffle is bent and pressed against the inner wall of the mounting frame, a plurality of third holes are provided at the bending part of the baffle, and a plurality of elongated fourth holes for use with the third holes are provided on the mounting frame. A second bolt is provided between the baffle and the mounting frame, and the second bolt is threadedly connected in the fourth hole and the third hole.

[0019] By adopting the above technical solution, when the detection plate needs to be expanded, the second bolt is taken out in the direction away from the installation frame, the baffle is moved in the direction away from the detection plate, the new detection plate is inserted into the installation frame, and then the second bolt is passed through the fourth hole and threaded into the third hole, so that the device can expand the detection plate by adjusting the position of the baffle.

[0020] Optionally, a sealing rubber ring is provided between the shell and the bottom plate.

[0021] By adopting the above technical solution, the provision of the sealing rubber ring improves the sealing between the bottom plate and the shell.

[0022] Optionally, a handle hole is provided on the edge of the bottom plate.

[0023] By adopting the above technical solution, it is convenient for operators to move the multi-layer detector for measuring the depth dose distribution of particle radiotherapy beam.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. When the detection plate needs to be repaired or expanded, the existing technology prevents the bolts from damaging the detection plate during the disassembly process.

[0026] 2. The cooperation between the pressure plate and the second latch can make the process of removing the pressure plate easier.

[0027] 3. The detection board inside the installation frame can be expanded by adjusting the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is the main structure diagram of Example 1 of the present application.

[0030] Figure 2 This is a main structural diagram of the interior of the shell of Example 1 of the present application.

[0031] Figure 3 This is the main structure diagram of the baffle in Example 1 of the present application.

[0032] Figure 4 This is an enlarged view of the structure at point A of Example 1 of the present application.

[0033] Figure 5 This is a main structural diagram of the interior of the shell of Example 2 of the present application.

[0034] Figure 6 This is an enlarged view of the structure at point B of Example 2 of the present application.

[0035] Figure 7 This is a main structural diagram of the interior of the shell of Example 3 of the present application.

[0036] Figure 8 This is the main structural diagram of the pressure plate and the latch in Example 3 of the present application.

[0037] Figure numerals: 1. base plate; 2. mounting frame; 3. electronics board; 4. housing; 5. cavity; 6. detection board; 7. adjustment member; 8. pressure plate; 9. first hole; 10. second hole; 11. connector; 12. first latch; 13. first spring; 14. first bolt; 15. first plate; 16. second plate; 17. first protrusion; 18. second protrusion; 19. second spring; 20. second latch; 21. baffle; 22. third hole; 23. fourth hole; 24. second bolt; 25. sealing rubber ring; 26. handle hole. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-8 This application is described in further detail.

[0039] Example 1

[0040] An embodiment of the present application discloses a device for measuring the depth dose distribution of a particle radiotherapy beam.

[0041] Reference Figure 1 A device for measuring the depth dose distribution of a particle radiotherapy beam comprises a base plate 1 and a housing 4. A handle hole 26 is provided on the edge of the base plate 1 to make it more convenient for an operator to move the device.

[0042] Reference Figure 1 and Figure 2 A shell 4 is fixed on the base plate 1, and a sealing rubber ring 25 is provided at the connection between the shell 4 and the base plate 1 to reduce the entry of dust into the device for measuring the depth dose distribution of particle radiotherapy beam. The setting of the sealing rubber ring 25 makes the sealing between the base plate 1 and the shell 4 better.

[0043] Reference Figure 1 and Figure 2 A mounting frame 2 is provided inside the shell 4, and the mounting frame 2 is fixed on the base plate 1. A cavity 5 is formed in the mounting frame 2, and the cavity 5 is used to place a detection board 6. Several detection boards 6 are evenly spaced in the mounting frame 2, and the detection boards 6 are perpendicular to the base plate 1. Particles are injected in a direction perpendicular to the detection boards 6. The detection boards 6 arranged at different positions can detect data at different positions. An electronic board 3 is fixed on the side of the mounting frame 2 away from the base plate 1, and the electronic board 3 is used to collect data from the detection boards 6.

[0044] Reference Figure 2 and Figure 3 An adjusting member 7 is provided in the cavity 5. The adjusting member 7 is a baffle 21. The baffle 21 is bent at both ends near the mounting frame 2. A plurality of third holes 22 are provided at the bending portion. A fourth hole 23 is provided on the mounting frame 2 for use with the third hole 22. The fourth hole 23 is in the shape of a strip. A second bolt 24 is provided between the mounting frame 2 and the baffle 21. The second bolt 24 is threadedly connected in the fourth hole 23 and the third hole 22. When the detection plate 6 needs to be expanded, the baffle 21 is moved in a direction away from the detection plate 6, and then the second bolt 24 is passed through the fourth hole 23 and threadedly connected in the third hole 22. The detection plate 6 is vertically inserted into the cavity 5 to complete the expansion of the detection plate 6.

[0045] Reference Figure 2 and Figure 4 A pressure plate 8 is provided on the side of the mounting frame 2 away from the bottom plate 1. The pressure plate 8 fixes the detection plate 6 in the mounting frame 2. Both ends of the pressure plate 8 are bent and have a first hole 9. Both sides of the mounting frame 2 have a second hole 10 that matches the first hole 9. A plug-in component 11 is provided between the pressure plate 8 and the mounting frame 2. The plug-in component 11 includes a first latch 12 and a first spring 13. One end of the first spring 13 is fixed to the mounting frame 2, and the other end is fixed to the first latch 12. The latch passes through the first hole 9 and is fixed. In the second hole 10, in the initial state, the first spring 13 provides elastic force to lock the first pin 12 inward, so that the first pin 12 is more firmly locked on the mounting frame 2. When the detection board 6 needs to be replaced, the first pin 12 is removed from the first hole 9 and the second hole 10, the pressure plate 8 is taken out along the side away from the cavity 5, the damaged detection board 6 is taken out along the side away from the bottom plate 1, and then the new detection board 6 is vertically inserted into the mounting frame 2, and then the pressure plate 8 is installed. The replacement of the damaged detection board 6 can be completed.

[0046] The implementation principle of the device for measuring the depth dose distribution of a particle radiotherapy beam in Example 1 of the present application is as follows: a particle beam passes through mutually parallel detection plates 6, and data is measured at various positions on the detection plates 6. When a detection plate 6 is damaged, the first latch 12 on the pressure plate 8 is removed in a direction away from the mounting frame 2, the pressure plate 8 is then removed in a direction away from the mounting frame 2, the damaged detection plate 6 in the mounting frame 2 is removed in a direction away from the base plate 1, a new detection plate 6 is vertically placed in the cavity 5, and the pressure plate 8 is then installed to complete the replacement of the damaged detection plate 6. When it is necessary to expand the detection plate 6, the first latch 12 on the pressure plate 8 is removed in a direction away from the mounting frame 2, the pressure plate 8 is removed in a direction away from the mounting frame 2, the second bolt 24 is removed, the baffle 21 is moved in a direction away from the detection plate 6, the second bolt 24 is then passed through the fourth hole 23 and threaded into the third hole 22, the detection plate 6 is then vertically inserted into the cavity 5, and the pressure plate 8 is plugged into the mounting frame 2 via the latch to complete the expansion of the detection plate 6. The problem in the prior art that the detection plate 6 is easily damaged when the detection plate 6 is removed from the bolt or installed during maintenance and expansion is solved.

[0047] Example 2

[0048] The device for measuring the depth dose distribution of a particle radiotherapy beam in Example 2 of the present application is different from that in Example 1 in that another implementation of the connector 11 is provided.

[0049] Reference Figure 5 and Figure 6 The plug-in connector 11 is a first bolt 14 . The first bolt 14 passes through the first hole 9 and the second hole 10 . The first bolt 14 is used to fix the pressing plate 8 and the mounting frame 2 .

[0050] The implementation principle of the device for measuring the depth dose distribution of a particle radiotherapy beam in Example 2 of the present application is as follows: the particle beam passes through mutually parallel detection plates 6, and data is measured at various positions on the detection plates 6. When the detection plate 6 is damaged, the first bolt 14 on the pressure plate 8 is removed in a direction away from the mounting frame 2, and then the pressure plate 8 is removed in a direction away from the mounting frame 2. The damaged detection plate 6 in the mounting frame 2 is removed in a direction away from the base plate 1, and a new detection plate 6 is placed vertically in the cavity 5. The pressure plate 8 is then installed to complete the replacement of the damaged detection plate 6. When it is necessary to expand the detection plate 6, the first bolt 14 on the pressure plate 8 is removed in a direction away from the mounting frame 2, the pressure plate 8 is removed in a direction away from the mounting frame 2, the second bolt 24 is removed, the baffle 21 is moved in a direction away from the detection plate 6, and then the second bolt 24 is passed through the fourth hole 23 and threaded into the third hole 22. The detection plate 6 is then vertically inserted into the cavity 5, and the pressure plate 8 is threaded onto the mounting frame 2 via the first bolt 14 to complete the expansion of the detection plate 6. The problem in the prior art that the detection plate 6 is easily damaged when the detection plate 6 is removed from the bolt or installed during maintenance and expansion is solved.

[0051] Example 3

[0052] The device for measuring the depth dose distribution of a particle radiotherapy beam in Example 3 of the present application is different from that in Example 1 in that another implementation of the pressing plate 8 and the connector 11 is provided.

[0053] Reference Figure 7 and Figure 8 The pressing plate 8 includes a bent first plate 15 and a bent second plate 16, and the second plate slides inside the first plate 15. The first hole 9 at one end of the pressing plate 8 is located at the bent end of the first plate 15, and the first hole 9 at the other end of the pressing plate 8 is located at the bent end of the second plate 16. The first plate 15 is integrally formed with a first protrusion 17 in the opposite direction of the bent end, and the second plate 16 is integrally formed with a second protrusion 18 in the opposite direction of the bent end. A second spring 19 is provided between the first protrusion 17 and the second protrusion 18, one end of the second spring 19 is fixed on the first protrusion 17, and the other end of the second spring 19 is fixed on the second protrusion 18. The plug-in connector 11 is a second pin 20, which is fixed in the first hole 9. The second pin 20 passes through the first hole 9 and is inserted into the second hole 10. In the initial state, the second spring 19 pulls the first plate 15 and the second plate 16 inward, thereby pressing the second pin 20 tightly against the first hole 9 and the second hole 10.

[0054] The implementation principle of an apparatus for measuring the depth dose distribution of a particle radiotherapy beam in Example 3 of the present application is as follows: the particle beam passes through mutually parallel detection plates 6, and data is measured at various positions of the detection plates 6. When the detection plate 6 is damaged, the second pin 20 on the pressure plate 8 is removed in a direction away from the mounting frame 2, and then the second plate 16 is stretched in a direction away from the first plate 15, thereby removing the pressure plate 8 in a direction away from the base plate 1, taking out the damaged detection plate 6 in the mounting frame 2 in a direction away from the base plate 1, placing a new detection plate 6 vertically in the cavity 5, and then installing the pressure plate 8 to complete the replacement of the damaged detection plate 6. When it is necessary to expand the detection plate 6, the second latch 20 on the pressure plate 8 is removed in a direction away from the mounting frame 2, and then the second plate 16 is stretched in a direction away from the first plate 15, thereby removing the pressure plate 8 in a direction away from the base plate 1, removing the second bolt 24, moving the baffle 21 in a direction away from the detection plate 6, and then passing the second bolt 24 through the fourth hole 23 and threading it into the third hole 22. The detection plate 6 is then vertically inserted into the cavity 5, and the pressure plate 8 is plugged into the mounting frame 2 via the latch, thereby completing the expansion of the detection plate 6. This solves the problem in the prior art that the detection plate 6 is easily damaged when it is removed from the bolts or installed during maintenance and expansion.

[0055] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0056] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A device for measuring the depth dose distribution of a particle radiotherapy beam, comprising a base plate (1), a mounting frame (2) fixed to the base plate (1), an electronics board (3) fixed to a side of the mounting frame (2) away from the base plate (1), and a housing (4) fixed to the base plate (1), wherein a cavity (5) is formed inside the mounting frame (2), and the cavity (5) is used to place a detection board (6), and is characterized in that: An adjusting member (7) for adjusting the size of the cavity (5) is provided in the cavity (5); a pressure plate (8) is provided on the side of the installation frame (2) away from the bottom plate (1); the pressure plate (8) fixes the detection plate (6) in the cavity (5); both ends of the pressure plate (8) are bent and each has a first hole (9); both sides of the installation frame (2) have a second hole (10) for use with the first hole (9); a connector (11) is provided between the pressure plate (8) and the installation frame (2); the connector (11) passes through the first hole (9) and the second hole (10); the connector (11) is used to fix the pressure plate (8) and the installation frame (2).

2. The device for measuring the depth dose distribution of a particle radiotherapy beam according to claim 1, characterized in that: The connector (11) comprises a first latch (12) and a first spring (13), one end of the first spring (13) is fixed on the first latch (12), the other end of the first spring (13) is fixed on the mounting frame (2), and the first latch (12) passes through the first hole (9) and is inserted into the second hole (10).

3. The device for measuring the depth dose distribution of a particle radiotherapy beam according to claim 1, characterized in that: The plug-in connector (11) is a first bolt (14), and the first bolt (14) is threadedly connected in the first hole (9) and the second hole (10).

4. The device for measuring the depth dose distribution of a particle radiotherapy beam according to claim 1, characterized in that: The pressure plate (8) includes a first plate (15) with one end bent and a second plate (16) with one end bent and sliding inside the first plate (15), a first hole (9) at one end of the pressure plate (8) is located at the bent end of the first plate (15), and a first hole (9) at the other end of the pressure plate (8) is located at the bent end of the second plate (16), the first plate (15) is integrally formed with a first protrusion (17) in the opposite direction of the bending, and the second plate (16) is integrally formed with a second protrusion (18) in the opposite direction of the bending, a second spring (19) is arranged between the first protrusion (17) and the second protrusion (18), one end of the second spring (19) is fixed on the first protrusion (17), and the other end of the second spring (19) is fixed on the second protrusion (18).

5. The device for measuring the depth dose distribution of a particle radiotherapy beam according to claim 4, characterized in that: The plug connector (11) is a second plug pin (20), one end of the second plug pin (20) is fixed in the first hole (9), and the second plug pin (20) passes through the first hole (9) and is plugged into the second hole (10).

6. The device for measuring the depth dose distribution of a particle radiotherapy beam according to claim 1, characterized in that: The adjusting member (7) is a baffle (21), the edge of the baffle (21) is bent and abuts against the inner wall of the mounting frame (2), a plurality of third holes (22) are provided at the bent portion of the baffle (21), a plurality of elongated fourth holes (23) used in conjunction with the third holes (22) are provided on the mounting frame (2), a second bolt (24) is provided between the baffle (21) and the mounting frame (2), and the second bolt (24) is threadedly connected in the fourth hole (23) and the third hole (22).

7. The device for measuring the depth dose distribution of a particle radiotherapy beam according to claim 1, characterized in that: A sealing rubber ring (25) is provided between the housing (4) and the bottom plate (1).

8. The device for measuring the depth dose distribution of a particle radiotherapy beam according to claim 1, characterized in that: A handle hole (26) is provided on the edge of the bottom plate (1).

Images