Beam shaping device, neutron capture therapy system, and moderator auxiliary mounting system

Abstract

Provided are a beam shaping device (10), a neutron capture therapy system (20), and a moderator auxiliary mounting system (30), relating to the technical field of medical equipment. The beam shaping device (10) comprises a moderator assembly (100) and a fixing mechanism (300). An accommodating cavity (200) is formed in the beam shaping device (10), and the moderator assembly (100) is disposed in the accommodating cavity (200). The moderator assembly (100) is configured for adjusting the energy of a neutron beam, and the fixing mechanism (300) is configured for fixing the moderator assembly (100) in the accommodating cavity (200). The mounting stability of the moderator assembly (100) in the accommodating cavity (200) is ensured, and the structural stability of the beam shaping device (10) is improved, such that the beam shaping device (10) can be applied in a vertical irradiation chamber (642).

Description

Beam shaping device, neutron capture therapy system and slow body assisted installation system Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a beam shaping device, a neutron capture therapy system, and a slowing body auxiliary installation system. Background Technology

[0002] With the development of atomic science, radiation therapy, such as cobalt-60, linear accelerators, and electron beams, has become one of the main methods of cancer treatment. However, traditional photon or electron therapy is limited by the physical conditions of radiation itself. While killing tumor cells, it also damages a large amount of normal tissue along the beam path. In addition, due to the different sensitivities of tumor cells to radiation, traditional radiation therapy is often ineffective for more radiation-resistant malignant tumors (such as glioblastoma multiforme and melanoma). To reduce radiation damage to normal tissues surrounding the tumor, the concept of targeted therapy in chemotherapy has been applied to radiation therapy. For highly radiation-resistant tumor cells, radiation sources with high relative biological effectiveness (RBE) are being actively developed, such as proton therapy, heavy ion therapy, and neutron capture therapy. Neutron capture therapy combines the above two concepts. For example, boron neutron capture therapy uses the specific accumulation of boron-containing drugs on tumor cells, combined with precise neutron beam control, to provide a better cancer treatment option than traditional radiation.

[0003] In existing boron neutron capture therapy (BNCT) protocols, multiple irradiation chambers are typically used to treat multiple patients simultaneously to improve treatment efficiency. For example, in a horizontal irradiation chamber, the neutron beam is horizontal, and the corresponding beam shaping unit (BSA) axis is also horizontal, allowing the BSA to be embedded in the wall for vertical support. However, in a vertical irradiation chamber, the neutron beam is vertical, flowing downwards, and the BSA axis is vertical. Existing BSAs are assembled from multiple modules without any fixed design between them, leading to a risk of the BSA falling during vertical installation, posing a safety hazard and potentially damaging the equipment. Furthermore, the weight of each module in the beam shaping unit is substantial, sometimes reaching several tons, making manual assembly in the vertical direction extremely laborious and difficult, resulting in low installation efficiency. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, the technical problem to be solved by the embodiments of the present invention is how to fix the constituent modules of the beam shaping body, especially how to fix the retarder assembly, and how to assemble the beam shaping device in the vertical direction. Therefore, the inventors provide a beam shaping device, a neutron capture therapy system, and a retarder auxiliary installation system.

[0005] The above-mentioned objectives of the present invention can be achieved by the following technical solutions. One aspect of the present invention provides a beam shaping device, comprising:

[0006] The retarder assembly is used for energy modulation of the neutron beam;

[0007] The beam shaping device has a receiving cavity, and the decelerating body assembly is disposed in the receiving cavity;

[0008] The beam shaping device also includes a fixing mechanism, which is used to fix the retarder assembly in the receiving cavity. No matter how the installation direction of the beam shaping device is adjusted, the retarder assembly will not fall off.

[0009] In a preferred embodiment of the present invention, the retarder assembly includes a first retarder unit disposed in the receiving cavity. The receiving cavity includes a first wall that is circumferentially closed and extends along a preset direction and a second wall disposed perpendicular to the preset direction. The neutron beam has a central axis N, and the preset direction is parallel to the central axis N. The fixing mechanism includes a first snap-fit ​​structure disposed on the first wall of the receiving cavity. The first snap-fit ​​structure can prevent the first retarder unit from displacing along the preset direction.

[0010] In a preferred embodiment of the present invention, the first snap-fit ​​structure includes a rotating member and a snap-fit ​​member disposed on the rotating member. A first receiving groove extending along the preset direction is provided on the first wall of the receiving cavity. The first receiving groove is connected to the receiving cavity. The rotating member is disposed in the first receiving groove. The rotating member can drive the snap-fit ​​member to switch between a locked position and an unlocked position. In the locked position, at least a portion of the snap-fit ​​member extends out of the first receiving groove, and the extended portion abuts against the first retarder unit. In the unlocked position, the snap-fit ​​member is entirely received in the first receiving groove, which facilitates the installation or removal of the first retarder unit.

[0011] In a preferred embodiment of the present invention, the rotating member is threadedly connected to the snap-fit ​​member, and a limiting portion is provided on one side of the snap-fit ​​member;

[0012] When the latching member is in the locked position, the limiting part slidably abuts against the inner wall of the first receiving groove, the latching member can move along the axial direction of the rotating member under the rotation drive of the rotating member, the latching member abuts against the first retarder unit and prevents the first retarder unit from displacing along the preset direction;

[0013] When the latching member is in the unlocked position, the limiting part disengages from the inner wall of the first receiving groove, and the latching member is fully received in the first receiving groove. The first retarder unit can enter and exit the receiving cavity without obstruction, which facilitates the installation or removal of the first retarder unit.

[0014] In a preferred embodiment of the present invention, the rotating member includes a screw, one end of which is rotatably connected to the second wall of the receiving cavity, and the snap-fit ​​member includes a snap-fit ​​block threaded onto the screw.

[0015] In a preferred embodiment of the present invention, a drive hole is provided on the other end of the screw, and a fixing plate is provided at the end of the beam shaping device away from the second wall of the receiving cavity. The other end of the screw is rotatably connected to the fixing plate, and the drive hole is located on the fixing plate.

[0016] In a preferred embodiment of the present invention, a plurality of first snap-fit ​​structures are provided, and the plurality of first snap-fit ​​structures are arranged at circumferential intervals along the first retarder unit.

[0017] In a preferred embodiment of the present invention, the first retarder unit includes a plurality of first retarder sub-units, the first retarder sub-units having a sheet-like structure, and the plurality of first retarder sub-units being stacked on top of each other.

[0018] In a preferred embodiment of the present invention, the beam shaping device further includes a charged particle beam channel, which passes through the second wall of the receiving cavity along the charged particle beam travel direction and communicates with the receiving cavity. At least a portion of the charged particle beam channel extends into the receiving cavity to form an extension section. The deceleration body assembly further includes a second deceleration body unit, which is disposed around the extension section. The fixing mechanism includes a second snap-fit ​​structure disposed in the receiving cavity, which can prevent the second deceleration body unit from displacing along the preset direction.

[0019] In a preferred embodiment of the present invention, the second snap-fit ​​structure includes a limiting member, a limiting groove is provided on the first wall of the receiving cavity, the limiting groove is perpendicular to the preset direction and communicates with the receiving cavity, the limiting member is detachably inserted into the limiting groove, at least a portion of the limiting member extends into the receiving cavity, and the portion of the limiting member extending into the receiving cavity can abut against the second retarder unit and prevent the second retarder unit from displacing along the preset direction.

[0020] In a preferred embodiment of the present invention, the limiting member includes a limiting plate that extends circumferentially along the second retarder unit.

[0021] In a preferred embodiment of the present invention, a plurality of limiting plates are provided, and the plurality of limiting plates are arranged at intervals along the circumference of the second retarder unit. The plurality of limiting plates can be connected end to end or can be arranged separately from each other.

[0022] In a preferred embodiment of the present invention, a second receiving groove is provided on one end face of the second retarder unit facing the limiting plate. The second receiving groove is used to receive the portion of the limiting plate extending into the receiving cavity. Along the preset direction, the thickness of the limiting plate is not greater than the depth of the second receiving groove.

[0023] In a preferred embodiment of the present invention, the second retarder unit includes a plurality of second retarder sub-units, the second retarder sub-units having a ring structure, and the plurality of second retarder sub-units being stacked on top of each other.

[0024] In a preferred embodiment of the present invention, the beam shaping device further includes a reflector and a beam exit, the receiving cavity is formed in the reflector, and the neutron beam, after being energy-adjusted by the deceleration body assembly, is emitted from the beam exit.

[0025] A second aspect of the present invention provides a neutron capture therapy system, comprising:

[0026] Charged particle beam generating unit, used to generate charged particle beams;

[0027] Neutron generating section, used to generate a neutron beam by interacting with a beam of charged particles;

[0028] A beam transmission unit is used to transmit the charged particle beam generated by the charged particle beam generation unit to the neutron generation unit.

[0029] A beam shaping device includes a retarder assembly for adjusting the energy of a neutron beam; a receiving cavity is formed within the beam shaping device, and the retarder assembly is disposed within the receiving cavity; the beam shaping device further includes a fixing mechanism for fixing the retarder assembly within the receiving cavity.

[0030] In a preferred embodiment of the present invention, the neutron capture therapy system further includes an irradiation chamber for accommodating an irradiated body receiving neutron beam irradiation; and a beam transmission chamber for accommodating a beam transmission unit.

[0031] The irradiation chamber includes a vertical irradiation chamber, and the beam transmission chamber is located above the vertical irradiation chamber;

[0032] The beam shaping device is vertically installed at the top of the vertical irradiation chamber, and the fixing mechanism is used to limit and fix the decelerating body assembly in the vertical direction.

[0033] In a preferred embodiment of the present invention, the retarder assembly includes a first retarder unit disposed in the receiving cavity. The receiving cavity includes a first wall that is circumferentially closed and extends in a vertical direction and a second wall that is disposed in a horizontal direction. The fixing mechanism includes a first snap-fit ​​structure disposed in the first wall of the receiving cavity. The first snap-fit ​​structure can prevent the first retarder unit from displacing in the vertical direction.

[0034] In a preferred embodiment of the present invention, the beam shaping device further includes a charged particle beam channel that passes through the second wall of the receiving cavity in a vertical direction and communicates with the receiving cavity. At least a portion of the charged particle beam channel extends into the receiving cavity to form an extension section. The deceleration body assembly further includes a second deceleration body unit that is disposed around the extension section. The fixing mechanism includes a second snap-fit ​​structure disposed in the receiving cavity that can prevent the second deceleration body unit from displacing in the vertical direction.

[0035] A third aspect of the present invention provides a slowing body-assisted installation system for installing a beam shaping device, the beam shaping device comprising:

[0036] The retarder assembly is used for energy modulation of the neutron beam;

[0037] The beam shaping device has a receiving cavity, and the decelerating body assembly is disposed in the receiving cavity;

[0038] The beam shaping device also includes a fixing mechanism, which is used to fix the retarder assembly in the receiving cavity. No matter how the installation direction of the beam shaping device is adjusted, the retarder assembly will not fall off.

[0039] In a preferred embodiment of the present invention, the retarder-assisted installation system includes:

[0040] A transport device, wherein a transport platform is provided on the transport device;

[0041] A limiting device is provided on the transport platform;

[0042] A lifting support device is provided on the transport device for supporting and lifting the retardant assembly, so that the retardant assembly moves closer to or away from the structure of the retardant assembly to be installed in the vertical direction.

[0043] A control device for controlling the horizontal movement of the transport device and / or the lifting movement of the lifting support device.

[0044] In a preferred embodiment of the present invention, the lifting support device includes a support platform for supporting the deceleration body assembly, and a lifting mechanism disposed below the support platform.

[0045] In a preferred embodiment of the present invention, the control device includes a control element and a position detection element, the control element being electrically connected to the position detection element, the transport device, and the lifting mechanism, respectively; the structure of the retarder assembly to be installed includes a receiving cavity extending in a vertical direction, and the control element is capable of controlling the horizontal movement of the transport device and / or the lifting movement of the lifting mechanism based on the position signal of the retarder assembly and the outlet of the receiving cavity obtained by the position detection element.

[0046] In a preferred embodiment of the invention, the position detection element includes one or more combinations of a visual detector, a laser emitter, or a radar detector.

[0047] In a preferred embodiment of the present invention, the limiting device includes multiple limiting posts, which are spaced apart around the lifting support device, and the limiting posts are detachably mounted on the transport platform.

[0048] In a preferred embodiment of the present invention, the lifting mechanism includes a liftable lifting member and a lifting drive assembly for driving the lifting member, and the supporting platform is disposed on the top of the lifting member.

[0049] In a preferred embodiment of the present invention, the slow-moving body auxiliary installation system further includes a buffer mechanism disposed between the lifting mechanism and the supporting platform.

[0050] In a preferred embodiment of the present invention, the slowing body auxiliary installation system further includes a buffer mechanism disposed between the lifting member and the supporting platform.

[0051] In a preferred embodiment of the present invention, the slow-moving body auxiliary installation system further includes a pressure detection element disposed on the support platform, the pressure detection element being electrically connected to the control element; the control element is capable of controlling the lifting movement of the lifting mechanism based on the pressure value obtained by the pressure detection element.

[0052] In a preferred embodiment of the present invention, the slowing body auxiliary installation system further includes an alarm device, which is electrically connected to the pressure detection element. When the pressure value obtained by the pressure detection element exceeds a preset pressure value, the alarm device issues an alarm signal.

[0053] In a preferred embodiment of the present invention, the retarder auxiliary installation system further includes an alarm device, which is electrically connected to the position detection element. When the position detection element detects a deviation between the positional relationship of the retarder assembly and the structure of the retarder assembly to be installed and a preset positional relationship, the alarm device issues an alarm signal.

[0054] In a preferred embodiment of the present invention, the slowing body auxiliary installation system further includes an adjustment and positioning device disposed on the transport device, the adjustment and positioning device including a plurality of adjustment mechanisms, the plurality of adjustment mechanisms being used to adjust the horizontal angle of the transport platform.

[0055] In a preferred embodiment of the present invention, the adjustment mechanism includes an adjustment member disposed at the bottom of the transport device and an adjustment drive assembly for driving the adjustment member, wherein the length of the adjustment member extending out of the bottom of the transport device is adjustable.

[0056] In a preferred embodiment of the present invention, the slowing body auxiliary installation system further includes a display element and / or an operation button disposed on the transport device, the display element and / or the operation button being electrically connected to the control element.

[0057] The technical solution of the present invention has the following significant beneficial effects:

[0058] When the beam shaping device of the present invention is used, a receiving cavity is formed within the beam shaping device, and a slowing body assembly is disposed in the receiving cavity. The energy of the radiation beam can be adjusted by the slowing body assembly. The slowing body assembly can be fixed in the receiving cavity by a fixing mechanism. Even when the beam shaping device is installed vertically, the fixing mechanism can provide stable support for the slowing body assembly, thereby preventing the slowing body assembly from falling out of the receiving cavity and ensuring the installation stability of the slowing body assembly in the receiving cavity. This improves the structural stability of the beam shaping device, enabling the beam shaping device to be used in vertical treatment rooms.

[0059] The beneficial effects of the retarder-assisted installation system of the present invention are as follows: This retarder-assisted installation system can quickly and smoothly transport retarder components to the target location via a transport device, improving transport efficiency. Furthermore, by incorporating a lifting support device on the transport device, the retarder component can be precisely supported and lifted, and a limiting device ensures the positional stability of the retarder component during lifting, preventing tilting or sliding, thereby improving installation accuracy. The retarder-assisted installation system of the present invention, through the cooperation of the transport platform, limiting device, and lifting support device, not only efficiently transports retarder components but also ensures their stability during lifting, reducing the safety risks associated with manual installation of the retarder component. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0062] Figure 1 is a side sectional view of an embodiment of the beam shaping device of the present invention;

[0063] Figure 2 is a three-dimensional structural schematic diagram of an embodiment of the fixing mechanism of the present invention;

[0064] Figure 3 is a three-dimensional structural schematic diagram of an embodiment of the first snap-fit ​​structure of the present invention;

[0065] Figure 4 is a schematic diagram of the installation structure of an embodiment of the snap-fit ​​component of the present invention;

[0066] Figure 5 is a structural schematic diagram of an embodiment of the second retarder unit of the present invention;

[0067] Figure 6 is an enlarged cross-sectional view of part I in Figure 5;

[0068] Figure 7 is a three-dimensional structural schematic diagram of an embodiment of the snap-fit ​​component of the present invention in the locked position;

[0069] Figure 8 is a three-dimensional structural diagram of an embodiment of the snap-fit ​​component of the present invention in the unlocked position;

[0070] Figure 9 is a three-dimensional structural schematic diagram of an embodiment of the first retarder unit with a relatively small thickness provided in the accommodating cavity of the present invention.

[0071] Figure 10 is a three-dimensional structural schematic diagram of an embodiment of the first retarder unit with a relatively large thickness in the accommodating cavity of the present invention.

[0072] Figure 11 is a schematic diagram of an embodiment of the neutron capture therapy system of the present invention;

[0073] Figure 12 is a schematic diagram of the XY plane distribution of an embodiment of the horizontal irradiation chamber of the present invention;

[0074] Figure 13 is a schematic diagram of the ZY plane distribution of an embodiment of the vertical irradiation chamber of the present invention;

[0075] Figure 14 is a three-dimensional structural schematic diagram of an embodiment of the slow-moving body assisted installation system of the present invention;

[0076] Figure 15 is a three-dimensional structural schematic diagram of an embodiment of the lifting component of the present invention in a raised state;

[0077] Figure 16 is a top view of an embodiment of the slow-moving body auxiliary installation system of the present invention;

[0078] Figure 17 is a three-dimensional structural schematic diagram of an embodiment of the adjustment and positioning device of the present invention.

[0079] Reference numerals in the above figures: 10, beam shaping device; 100, retarder assembly; 110, first retarder unit; 120, second retarder unit; 121, second receiving groove; 200, receiving cavity; 210, first wall; 211, first receiving groove; 212, limiting groove; 220, second wall; 300, fixing mechanism; 310, first snap-fit ​​structure; 311, rotating component; 312, snap-fit ​​component; 313, limiting part; 314, driving hole; 315, fixing plate; 320, second snap-fit ​​structure; 321, limiting component; 400, charged particle beam channel; 410, beam inlet; 420, extension section; 500, reflector; 510, beam outlet; 20, neutron capture therapy system; 610, charged particle beam generating part; 620, neutron generating part; 630. Beam transmission unit; 641. Horizontal irradiation chamber; 642. Vertical irradiation chamber; 650. Beam transmission chamber; 660. Collimator; 670. Mounting platform; 680. Irradiated object; 30. Decelerating body auxiliary installation system; 710. Transport device; 711. Transport platform; 712. Casters; 720. Limiting device; 721. Limiting column; 730. Lifting support device; 731. Supporting platform; 732. Lifting component; 740. Position detection element; 750. Buffer mechanism; 760. Adjustment and positioning device; 761. Adjusting component; 770. Display element; 780. Operation button; P. Charged particle beam; T. Target material; N. Neutron beam central axis; L1. Lower space; L2. Upper space. Detailed Implementation

[0080] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0081] Implementation Method 1

[0082] Referring to Figures 1 to 10, an embodiment of the present invention provides a beam shaping device 10, which includes a retarder assembly 100 and a fixing mechanism 300. A receiving cavity 200 is formed within the beam shaping device 10, and the retarder assembly 100 is disposed in the receiving cavity 200. The retarder assembly 100 is used to adjust the energy of the neutron beam, and the fixing mechanism 300 is used to fix the retarder assembly 100 in the receiving cavity 200.

[0083] Overall, during the assembly of the beam shaping device 10, the retarder assembly 100 is placed within the receiving cavity 200. Regardless of whether the neutron source for boron neutron capture therapy originates from a nuclear reactor or accelerates the nuclear reaction between charged particles and the target material T, the neutron beam contains neutrons ranging from low to high energy. For boron neutron capture therapy of deep tumors, the higher the content of radiation other than hyperthermic neutrons, the greater the proportion of non-selective dose deposition in normal tissues. Therefore, these radiation doses that cause unnecessary exposure should be minimized. The retarder assembly 100 allows for energy adjustment of the neutron beam, adjusting the neutron beam energy to the desired neutron energy range.

[0084] The fixing mechanism 300 can fix the retarder assembly 100 in the receiving cavity 200. Even when the beam shaping device 10 is installed vertically, the fixing mechanism 300 can provide stable support for the retarder assembly 100, thereby preventing the retarder assembly 100 from falling out of the receiving cavity 200. This ensures the installation stability of the retarder assembly 100 in the receiving cavity 200, thereby improving the structural stability of the beam shaping device 10 and enabling the beam shaping device 10 to be used in the vertical irradiation chamber 642.

[0085] In an embodiment of the present invention, as shown in FIG1, the beam shaping device 10 further includes a reflector 500 and a beam outlet 510. A receiving cavity 200 is formed in the reflector 500, and the neutron beam after being energy-adjusted by the deceleration body assembly 100 is emitted from the beam outlet 510.

[0086] Specifically, the reflector 500 is constructed in a cylindrical shape, such that the annular sidewall of the reflector 500 forms the first wall 210, the top of the reflector 500 forms the second wall 220, and the inner cavity of the reflector 500 forms the receiving cavity 200.

[0087] The reflector 500 can reflect neutrons that are off-center from the central axis N back to the treatment area, which can significantly increase the neutron flux emitted from the beam outlet 510, thereby improving treatment efficiency.

[0088] In an embodiment of the present invention, as shown in Figures 1, 2, 3 and 4, the retarder assembly 100 includes a first retarder unit 110 disposed in a receiving cavity 200. The receiving cavity 200 includes a first wall 210 disposed parallel to a preset direction and a second wall 220 disposed perpendicular to the preset direction. The fixing mechanism 300 includes a first snap-fit ​​structure 310 disposed on the first wall 210 of the receiving cavity 200. The first snap-fit ​​structure 310 can limit the first retarder unit 110 along the preset direction.

[0089] Specifically, the second wall 220 is disposed at one end of the first wall 210, thereby forming a receiving cavity 200 through the cooperation of the first wall 210 and the second wall 220. Furthermore, the other side of the first wall 210 is open, thereby facilitating the entry of the first retarder into the receiving cavity 200. The first retarder unit 110 is fixedly disposed in the receiving cavity 200 by the first snap-fit ​​structure 310, thereby improving the installation stability of the first retarder unit 110.

[0090] In an embodiment of the present invention, as shown in FIG1, the neutron beam has a central axis N, and a preset direction is parallel to the extension direction of the central axis N. For a neutron beam applied to a vertical irradiation chamber 642, the extension direction of the central axis N is vertical, and the preset direction is also vertical.

[0091] Since one end of the receiving cavity 200 is open, when the beam shaping device 10 is installed vertically, the open end faces the neutron beam exit direction, i.e., vertically downwards. Therefore, the first retarder unit 110 has a tendency to fall from the open end of the first wall 210. Thus, the present invention provides a first locking structure 310 on the first wall 210 of the receiving cavity 200. The first locking structure 310 can limit the first retarder unit 110 along a preset direction, i.e., prevent the first retarder unit 110 from displacing along the preset direction, thereby preventing the first retarder unit 110 from falling from the receiving cavity 200. This allows the beam shaping device 10 to be used in the vertical irradiation chamber 642.

[0092] In one specific embodiment, as shown in Figures 2, 3, 7, and 8, the first snap-fit ​​structure 310 includes a rotating member 311 and a snap-fit ​​member 312 disposed on the rotating member 311. A first receiving groove 211 extending along a predetermined direction is provided on the first wall 210 of the receiving cavity 200. The first receiving groove 211 has a U-shaped cross-section perpendicular to the predetermined direction, with the U-shaped opening facing the receiving cavity 200, meaning the first receiving groove 211 communicates with the receiving cavity 200. The rotating member 311 is disposed in the first receiving groove 211. In position 1, the rotating member 311 can drive the locking member 312 to switch between a locked position and an unlocked position. In the locked position, at least a portion of the locking member 312 extends out of the first receiving groove 211, and the portion extending out of the first receiving groove 211 can prevent the first retarder unit 110 from displacing in a preset direction. In the unlocked position, the locking member 312 is fully received in the first receiving groove 211, and the first retarder unit 110 can enter and exit the receiving cavity 200 without obstruction, which facilitates the installation or removal of the first retarder unit 110.

[0093] By placing the rotating member 311 within the first receiving groove 211, the rotating member 311 is prevented from encroaching on the receiving cavity 200, thus ensuring that the rotating member 311 does not interfere with the installation of the retarder assembly 100. Furthermore, by providing a latching member 312 on the rotating member 311, the rotating member 311 can rotate to switch the latching member 312 between a locked position and an unlocked position.

[0094] When the latching member 312 is switched to the locked position, as shown in the embodiment of FIG7, a portion of the latching member 312 can extend out of the first receiving groove 211 and abut against the first retarder unit 110, thereby using the latching member 312 to limit the first retarder unit 110.

[0095] When the latch 312 is switched to the unlocked position, as shown in the embodiment of FIG8, the latch 312 is fully accommodated in the first accommodating groove 211. At this time, the first retarder unit 110 can freely enter and exit the accommodating cavity 200 through the opening end of the first wall 210, which facilitates the installation or removal of the retarder assembly 100.

[0096] Designers can adjust the specific shape and structure of the snap-fit ​​component 312 according to usage requirements, and no specific limitations are imposed here. Preferably, the snap-fit ​​component 312 includes one or more combinations of snap-fit ​​blocks, snap-fit ​​plates, or snap-fit ​​rods.

[0097] In an embodiment of the present invention, as shown in FIG4, the rotating member 311 is threadedly connected to the snap-fit ​​member 312. A limiting portion 313 is provided on one side of the snap-fit ​​member 312, and the end edge of the limiting portion 313 is a convex curve. Referring to FIGS. 3 and 8, the inner wall of the first receiving groove 211 is shown as a minor arc shape in a cross-section perpendicular to a predetermined direction. The distance between the highest point of the arc of the inner wall of the first receiving groove 211 and the rotating member 311 is d1, and the distance between the edge of the groove opening of the first receiving groove 211 and the rotating member 311 is d2. The distance between the most protruding point of the end edge of the limiting part 313 and the rotating part 311 is equal to or slightly greater than d1 and less than d2, so that the limiting part 313 can move within the first receiving groove 211. When the limiting part 313 rotates to the deepest part of the first receiving groove 211, that is, when it reaches the highest point of the arc of the inner wall, it can abut against the inner wall of the first receiving groove 211, preventing the locking part 312 from rotating further. The distance between the edge of the locking part 312 away from the limiting part 313 and the rotating part 311 is greater than d1 and equal to or slightly less than d2, so that the locking part 312 can be accommodated in the first receiving groove 211, but cannot rotate to the deepest part of the first receiving groove 211.

[0098] As shown in the embodiments of Figure 9 or Figure 10, when the latching member 312 is in the locked position, the limiting part 313 rotates to the deepest part of the first receiving groove 211 and slidably abuts against the inner wall of the first receiving groove 211. The latching member 312 can move along the axial direction of the rotating member 311 under the rotation drive of the rotating member 311. The latching member 312 abuts against the first retarder unit 110 and limits the first retarder unit 110 in a preset direction, that is, it prevents the first retarder unit 110 from displacing in the preset direction, so that the first retarder unit 110 is tightly installed in the receiving cavity 200, improving the overall stability of the beam shaping device 10, and preventing the first retarder unit 110 from falling out of the receiving cavity 200 when the installation direction of the beam shaping device 10 is changed, thus improving the safety performance of the beam shaping device 10. As shown in the embodiment of FIG8, when the snap-fit ​​312 is in the unlocked position, the limiting part 313 disengages from the inner wall of the first receiving groove 211 and is entirely received in the first receiving groove 211.

[0099] Specifically, the drive rotating component 311 rotates in one direction, causing the locking component 312 to rotate and switch to the locked position. This allows the limiting part 313 of the locking component 312 to slidably abut against the inner wall of the first receiving groove 211. The limiting part 313 cooperates with the first receiving groove 211 to provide circumferential limiting, preventing the locking component 312 from rotating further. At this time, the rotating component 311 can continue to rotate, while the locking component 312 cannot. Under the threaded drive, the locking component 312 adjusts its position along the axial direction of the rotating component 311, thereby adjusting the distance between the locking component 312 and the second wall 220 until the locking component 312 abuts against the deceleration body assembly 100 and can no longer move along the axial direction of the rotating component 311. This better meets the installation and fixing needs of deceleration body assemblies 100 with different thicknesses.

[0100] Furthermore, when the drive rotating member 311 rotates in another direction, it drives the locking member 312 to rotate and switch to the unlocked position, thereby storing the locking member 312 and the limiting part 313 into the first receiving groove 211. At this time, the first retarder unit 110 can smoothly and unobstructedly enter and exit the receiving cavity 200, which facilitates the installation, disassembly, and maintenance of the retarder assembly 100.

[0101] Designers can adjust the rotation direction of the rotating component 311 to switch the latching component 312 between the unlocked and locked positions as needed, without making specific restrictions here.

[0102] For example, rotating member 311 clockwise switches the latching member 312 from the unlocked position to the locked position, or rotating member 311 counterclockwise switches the latching member 312 from the unlocked position to the locked position. This can be achieved by adjusting the direction of the thread.

[0103] In an embodiment of the present invention, as shown in Figures 3 and 4, the rotating member 311 includes a screw, one end of which is rotatably connected to the second wall 220 of the receiving cavity 200, and the snap-fit ​​member 312 includes a snap-fit ​​block that is threadedly connected to the screw.

[0104] Designers can adjust the specific shape and structure of the card block according to usage needs, and no specific restrictions are imposed here. The card block has an asymmetrical structure; preferably, the card block is constructed in a teardrop shape. More preferably, the limiting part 313 protrudes and is integrally formed with the card block on one side.

[0105] Furthermore, as shown in the embodiment of FIG4, the other end of the screw, i.e., the end away from the second wall 220, is provided with a driving hole 314, and the end of the beam shaping device 10 away from the second wall 220 of the receiving cavity 200 is provided with a fixing plate 315. The fixing plate 315 may be part of the encapsulation frame of the beam shaping device 10. The other end of the screw is rotatably connected to the fixing plate 315, and the driving hole 314 is located on the fixing plate 315.

[0106] A drive hole 314 is provided at the end of the screw away from the second wall 220. A wrench can be used to drive the screw to rotate through the drive hole 314, thereby using the screw to drive the locking block to switch between the unlocked and locked positions. The drive hole 314 is designed to facilitate manual operation by the operator and also to facilitate automatic control in conjunction with an electric drive device, thus providing better flexibility in use.

[0107] In an embodiment of the present invention, as shown in FIG7, a plurality of first snap-fit ​​structures 310 are provided, and the plurality of first snap-fit ​​structures 310 are arranged at intervals along the circumference of the first deceleration body unit 110. Preferably, two first snap-fit ​​structures 310 are provided and arranged in a centrally symmetrical manner.

[0108] By setting multiple first snap-fit ​​structures 310, the multiple first snap-fit ​​structures 310 can cooperate to fix the retarder assembly 100 in the receiving cavity 200, and distribute the weight of the retarder assembly 100 to the multiple first snap-fit ​​structures 310, reducing the load-bearing weight on a single first snap-fit ​​structure 310, thereby helping to improve the service life of each first snap-fit ​​structure 310, and improving the uniformity of stress on the retarder assembly 100, avoiding stress concentration and damage to the retarder assembly 100.

[0109] Furthermore, by setting multiple first snap-fit ​​structures 310, the safety risks can be reduced, preventing the slowing body component 100 from accidentally falling off due to damage to a single first snap-fit ​​structure 310, thus improving the safety of use.

[0110] In an embodiment of the present invention, the first retarding body unit 110 includes a plurality of first retarding body subunits, which are arranged in a sheet-like manner and are stacked on top of each other. Based on the magnitude of the neutron source intensity and the energy requirement of the final neutron beam, the number of stacked first retarding body subunits is adjusted, thereby adjusting the thickness of the first retarding body unit 110 so that the energy of the final neutron beam used for irradiation meets the irradiation requirements.

[0111] Designers can adjust the number, shape, and size of the first retardation subunit according to usage needs, without specific limitations. Preferably, the first retardation subunit is constructed as a circle and adapted to the cross-sectional shape and size of the receiving cavity 200 along a preset direction.

[0112] In another embodiment of the present invention, as shown in FIG1, the beam shaping device 10 further includes a charged particle beam channel 400, which passes through the second wall 220 of the receiving cavity 200 along the travel direction of the charged particle beam P and communicates with the receiving cavity 200. At least a portion of the charged particle beam channel 400 extends into the receiving cavity 200 to form an extension section 420. The retarder assembly 100 further includes a second retarder unit 120, which is disposed around the extension section 420. The fixing mechanism 3 The 00 includes a second snap-fit ​​structure 320 disposed within the receiving cavity 200. The second snap-fit ​​structure 320 can limit the second retarder unit 120 along a preset direction, that is, prevent the second retarder unit 120 from displacing along the preset direction, so that the second retarder unit 120 is tightly installed in the receiving cavity 200, thereby improving the overall stability of the beam shaping device 10. Furthermore, when changing the installation direction of the beam shaping device 10, it can prevent the second retarder unit 120 from falling out of the receiving cavity 200, thereby improving the safety performance of the beam shaping device 10.

[0113] The charged particle beam channel 400 has a beam inlet 410, and a neutron generating unit 620 is provided at the end of the charged particle beam channel 400. The charged particle beam P enters from the beam inlet 410 and interacts with the neutron generating unit 620 under the guidance of the charged particle beam channel 400 to generate a neutron beam. After the neutron beam is energy-adjusted by the deceleration body assembly 100, it exits from the beam outlet 510.

[0114] Furthermore, the neutron beam generated by the interaction between the charged particle beam P and the neutron generating unit 620 has a variety of and disordered directions of propagation. Most of the neutrons are emitted forward, while a small number of neutrons are scattered to the side or rear. By arranging the second slowing body unit 120 around the extension section 420, the energy of the neutron beam scattered to the side or rear of the neutron generating unit 620 is adjusted.

[0115] When the beam shaping device 10 is installed vertically, the second deceleration unit 120 is also at risk of falling or shifting due to gravity. Therefore, as shown in the embodiments of Figures 2, 5, and 6, the present invention provides a second locking structure 320 within the receiving cavity 200. The second locking structure 320 prevents the second deceleration unit 120 from shifting along a preset direction, thereby preventing the second deceleration unit 120 from falling out of the receiving cavity 200. This avoids the first deceleration unit 110 and the second deceleration unit 120 from accidentally detaching from the receiving cavity 200 together, improving the safety of the beam shaping device 10 and enabling its application in the vertical irradiation chamber 642.

[0116] In one specific embodiment, as shown in FIG6, the second snap-fit ​​structure 320 includes a limiting member 321. A limiting groove 212 is provided on the first wall 210 of the receiving cavity 200. The limiting groove 212 is perpendicular to a preset direction and communicates with the receiving cavity 200. The limiting member 321 is detachably inserted into the limiting groove 212. At least a portion of the limiting member 321 extends into the receiving cavity 200. The portion of the limiting member 321 extending into the receiving cavity 200 can abut against the second retarder unit 120 and prevent the second retarder unit 120 from displacing along the preset direction.

[0117] By inserting the limiting member 321 into the limiting groove 212 and extending a portion of the limiting member 321 out of the receiving cavity 200, the portion of the limiting member 321 extending into the receiving cavity 200 can abut against the second retarder unit 120, thereby limiting the second retarder unit 120 between the second wall 220 and the limiting member 321, thus ensuring the structural stability of the second retarder unit 120 in the receiving cavity 200.

[0118] Designers can adjust the specific shape and structure of the limiting member 321 according to the usage requirements, and no specific restrictions are imposed here. Preferably, the limiting member 321 includes a limiting plate, which extends circumferentially along the second retarder unit 120.

[0119] By extending the limiting plate along the circumference of the second retarder unit 120, the limiting plate is constructed in an arc shape, so that the second snap-fit ​​structure 320 can use the limiting plate to abut against a portion of the second retarder unit 120, thereby improving the load-bearing capacity of the limiting plate and helping to improve the uniformity of force on the second retarder unit 120, avoiding stress concentration and damage to the second retarder unit 120.

[0120] Furthermore, multiple limiting plates are provided, spaced apart circumferentially along the second retarder unit 120. Designers can adjust the number and size of the limiting plates according to usage needs; no specific limitations are imposed here. For example, two, three, or more limiting plates can be provided. These multiple limiting plates can be connected end-to-end to form a ring, or they can be spaced apart from each other.

[0121] By setting multiple limiting plates, each limiting plate can be independently inserted into the limiting groove 212, avoiding installation difficulties caused by excessively large limiting plates and thus reducing installation difficulty. Furthermore, when some of the limiting plates are damaged, it is easier to replace the damaged plates promptly, thereby reducing maintenance difficulty and cost.

[0122] In an embodiment of the present invention, as shown in FIG6, a second receiving groove 121 is provided on one end face of the second retarder unit 120 facing the limiting plate, and the portion of the limiting plate extending into the receiving cavity 200 can be inserted into the second receiving groove 121; along a preset direction, the thickness of the limiting plate is not greater than the depth of the second receiving groove 121.

[0123] By providing a second receiving groove 121 on the second retarder unit 120, the portion of the limiting plate protruding from the inner wall of the receiving cavity 200 can be inserted into the second receiving groove 121, thereby serving to store the limiting plate. Furthermore, the thickness of the limiting plate is no greater than the depth of the second receiving groove 121, allowing the limiting plate to be hidden between the first retarder unit 110 and the second retarder unit 120. This eliminates the gap between the first retarder unit 110 and the second retarder unit 120, enabling them to directly abut against each other and avoiding any impact on the neutron energy shaping effect of the retarder assembly 100.

[0124] Designers can adjust the shape of the second receiving groove 121 according to usage needs, without specific limitations. For example, the second receiving groove 121 extends circumferentially along the bottom end face of the second retarder unit 120, making the second receiving groove 121 annular. Furthermore, to prevent the limiting plate from interfering with the rotating member 311, a notch is provided on the limiting plate to avoid the rotating member 311.

[0125] In some embodiments, the thickness of the second retarder unit 120 of the beam shaping device 10 is fixed. Therefore, when assembling the beam shaping device 10, the second retarder unit 120 is installed first, and then installed into the corresponding position in the receiving cavity 200 and fixed by the second snap-fit ​​structure 320. Inside the vertical irradiation chamber 642, the beam shaping device 10, with the second retarder unit 120 already fixedly installed, is hoisted to the ceiling, and then the first retarder unit 110 is installed into the receiving cavity 200 and fixed by the first snap-fit ​​structure 310.

[0126] In an embodiment of the present invention, as shown in FIG5, the second retarder unit 120 includes a plurality of second retarder sub-units, which are arranged in a ring and stacked on top of each other.

[0127] Designers can adjust the number and size of the second retarder subunits according to usage needs, without specific limitations. Preferably, the outer radial dimension of the second retarder subunit is consistent with the inner diameter of the receiving cavity 200, and the inner radial dimension of the second retarder is consistent with the outer diameter of the extension 420 of the charged particle beam channel 400; and along a preset direction, the thickness of the second retarder subunit 120 is equal to the length of the extension 420.

[0128] Implementation Method 2

[0129] Referring to Figures 1 to 13, an embodiment of the present invention also provides a neutron capture therapy system 20. The neutron capture therapy system 20 includes a charged particle beam generating unit 610, a neutron generating unit 620, a beam transmission unit 630, and a beam shaping device 10. The charged particle beam generating unit 610 generates a charged particle beam P; the neutron generating unit 620 interacts with the charged particle beam P to generate a neutron beam; the beam transmission unit 630 transmits the charged particle beam P generated by the charged particle beam generating unit 610 to the neutron generating unit 620; the beam shaping device 10 includes a slowing body assembly 100 for adjusting the energy of the neutron beam; a receiving cavity 200 is formed within the beam shaping device 10, and the slowing body assembly 100 is disposed within the receiving cavity 200; the beam shaping device 10 also includes a fixing mechanism 300 for fixing the slowing body assembly 100 within the receiving cavity 200.

[0130] The specific structure, working principle and beneficial effects of the beam shaping device 10 are the same as those in Embodiment 1, and will not be repeated here.

[0131] Specifically, as shown in the embodiment of FIG11, the charged particle beam generating unit 610 includes an accelerator. The accelerator accelerates charged particles (such as protons, deuterons, etc.) to generate a charged particle beam P, such as a proton beam; the beam transmission unit 630 can transmit the charged particle beam P generated by the accelerator to the neutron generating unit 620; the charged particle beam P interacts with the neutron generating unit 620 to generate a therapeutic neutron beam, which, after being energy-adjusted by the slowing body assembly 100, irradiates the irradiated body 680 on the stage 670.

[0132] Designers may use different types of accelerators depending on the application requirements; no specific restrictions are imposed here. For example, an accelerator can be one of the following: a linear accelerator, a cyclotron, a synchrotron, or a synchrotron.

[0133] Furthermore, the neutron generating unit 620 includes a target material T. The charged particle beam P generated by the accelerator is transmitted to the target material T via the beam transmission unit 630 and interacts with the target material T to generate a neutron beam. The generated neutron beam is formed into a therapeutic neutron beam by the beam shaping device 10 and irradiates the irradiated body 680 on the stage 670.

[0134] Designers can adjust the specific composition of the target material T according to the application requirements, and no specific restrictions are imposed here. Preferably, the target material T is a metal target, specifically a lithium target or a beryllium target.

[0135] Of course, in other feasible embodiments, the target material T can also be made of metallic materials other than Li and Be.

[0136] Furthermore, a collimator 660 can be provided. The slowing body assembly 100 of the beam shaping device 10 can adjust the beam quality of the neutron beam generated by the interaction between the charged particle beam P and the target material T, and the collimator 660 can be used to focus the neutron beam before irradiating the object 680 on the stage 670.

[0137] In Figures 12 and 13, X and Y represent two perpendicular directions in the horizontal plane, and Z represents the vertical direction. L1 represents the lower space, and L2 represents the upper space.

[0138] In an embodiment of the present invention, as shown in Figures 12 and 13, the neutron capture therapy system 20 further includes an irradiation chamber and a beam transmission chamber 650. The irradiation chamber is used to accommodate the irradiated body 680 receiving neutron beam irradiation; the beam transmission chamber 650 is used to accommodate the beam transmission unit 630; the irradiation chamber includes a horizontal irradiation chamber 641 and a vertical irradiation chamber 642, with the beam transmission chamber 650 located above the vertical irradiation chamber 642; the beam shaping device 10 is vertically installed on the top of the vertical irradiation chamber 642, and the fixing mechanism 300 is used to limit and fix the slowing body assembly 100 in the vertical direction.

[0139] Specifically, the irradiation chamber and beam transmission chamber 650 are equipped with shielded spaces surrounded by shielding walls. Designers can adjust the specific shape, structure, and materials of the shielding walls according to usage requirements, without specific limitations. For example, the shielding walls can be made of boron-containing barite concrete with a thickness of more than 1m and a density of 3g / cc.

[0140] In an embodiment of the present invention, the retarder assembly 100 includes a first retarder unit 110 disposed in a receiving cavity 200. The receiving cavity 200 includes a first wall 210 that is circumferentially closed and extends vertically, and a second wall 220 disposed horizontally. The fixing mechanism 300 includes a first snap-fit ​​structure 310 disposed in the first wall 210 of the receiving cavity 200. The first snap-fit ​​structure 310 can limit the first retarder unit 110 in the vertical direction, that is, prevent the first retarder unit 110 from displacing in the vertical direction. The specific structure, working principle and beneficial effects of the first retarder unit 110 and the first snap-fit ​​structure 310 are the same as those in Embodiment 1, and will not be repeated here.

[0141] Furthermore, the beam shaping device 10 also includes a charged particle beam channel 400, which passes vertically through the second wall 220 of the receiving cavity 200 and communicates with the receiving cavity 200. At least a portion of the charged particle beam channel 400 extends into the receiving cavity 200 to form an extension section 420. The retarder assembly 100 also includes a second retarder unit 120, which is arranged around the extension section 420. The fixing mechanism 300 includes a second snap-fit ​​structure 320 disposed within the receiving cavity 200. The second snap-fit ​​structure 320 can limit the second retarder unit 120 in the vertical direction, that is, prevent the second retarder unit 120 from displacing in the vertical direction. The specific structure, working principle, and beneficial effects of the second retarder unit 120 and the second snap-fit ​​structure 320 are the same as in Embodiment 1, and will not be repeated here.

[0142] Implementation Method 3

[0143] Referring to Figures 1 to 17, an embodiment of the present invention provides a deceleration body auxiliary installation system 30. The deceleration body auxiliary installation system 30 includes a transport device 710, a limiting device 720, a lifting support device 730, and a control device. The transport device 710 is provided with a transport platform 711; the limiting device 720 is disposed on the transport platform 711; the lifting support device 730 is disposed on the transport device 710 and is used to support and lift the deceleration body assembly 100, so that the deceleration body assembly 100 moves closer to or away from the structure of the deceleration body assembly to be installed in the vertical direction; the control device is used to control the horizontal movement of the transport device 710 and / or the lifting movement of the lifting support device 730.

[0144] Overall, when the retarder auxiliary installation system 30 is in use, a transport platform 711 is provided on the transport device 710, and a limiting device 720 and a lifting support device 730 are provided on the transport platform 711. Thus, the transport device 710 can transport the retarder component 100 in the horizontal direction, and the lifting support device 730 supports and lifts the retarder component 100. The limiting device 720 can limit the retarder component 100, thereby ensuring the stability of the retarder component 100 during the lifting process.

[0145] In an embodiment of the present invention, a caster assembly is also provided at the bottom of the transport device 710. The caster assembly facilitates the overall movement of the slowing body-assisted installation system 30. Designers can adjust the specific structure of the caster assembly according to usage needs, and no specific limitations are imposed here. Preferably, the caster assembly includes multiple casters 712, which are arranged at intervals at the bottom of the transport device 710.

[0146] Furthermore, the control device can control the horizontal movement of the transport device 710 and / or the lifting movement of the lifting support device 730, thereby achieving automated control, ensuring control accuracy, and improving the installation efficiency of the slowing body assembly 100.

[0147] In an embodiment of the present invention, as shown in Figures 14 and 15, the lifting support device 730 includes a support platform 731 that supports the deceleration body assembly 100, and a lifting mechanism disposed below the support platform 731.

[0148] The support platform 731 can support the retarder assembly 100, and the lifting mechanism can lift the support platform 731 and the retarder assembly 100, thereby driving the retarder assembly 100 to move up and down, so that the retarder assembly 100 can be installed in the preset position.

[0149] Designers can adjust the specific structure of the lifting mechanism according to the needs of use, and no specific restrictions are imposed here. For example, the lifting mechanism may include one of the following: an electric lifting device, a hydraulic lifting device, or a pneumatic lifting device.

[0150] In an embodiment of the present invention, as shown in Figures 14 and 16, the control module includes a control element and a position detection element 740. The control element is electrically connected to the position detection element 740, the transport device 710, and the lifting mechanism, respectively. Based on the position signals of the structure of the retarder assembly 100 and the retarder assembly to be installed, acquired by the position detection unit 740, the control element can control the horizontal movement of the transport device 710 and / or the vertical movement of the lifting mechanism. The position signals include, but are not limited to, coordinate information within a space, such as an illumination room.

[0151] By electrically connecting the control element to the position detection unit 740, the transport device 710, and the lifting mechanism respectively, the position detection element 740 can acquire the position signals of the structure of the retarder assembly 100 and the retarder assembly to be installed, and the position detection element 740 can transmit the position signals to the control element, so that the control element controls the horizontal movement of the transport device 710 and / or the lifting movement of the lifting mechanism in real time based on the position signals, so that the retarder assembly 100 can be accurately installed in the preset position.

[0152] By using the control element and the position detection element 740 together, the installation accuracy of the beam shaping device 10 can be significantly improved, and it can help to achieve automated control, reduce manual operation, and improve safety and efficiency.

[0153] Designers can determine the specific structure of the retarder component to be installed according to the usage requirements, and no specific restrictions are imposed here.

[0154] Preferably, the retarder auxiliary installation system 30 is used to install the retarder assembly 100 in the vertical irradiation chamber. Specifically, the structure of the retarder assembly to be installed is the receiving cavity 200 of the beam shaping device 10, and the beam shaping device 10 is vertically installed in the vertical irradiation chamber 642, such that the opening end of the receiving cavity 200 of the beam shaping device 10 is set downward, so that the retarder assembly 100 can be installed into the receiving cavity 200 from bottom to top. In this embodiment, the retarder assembly 100 to be installed is a first retarder unit 110, which is composed of multiple disc-shaped first retarder sub-units stacked together. Because the friction between the layers of the first retarder unit 110 is very large, the first retarder sub-units will not shift relative to each other during horizontal movement or vertical movement.

[0155] Furthermore, the position detection element 740 includes one or more combinations of a visual detector, a laser emitter, or a radar detector. Designers can adjust the specific composition of the position detection element 740 according to application requirements, and no specific limitations are imposed here.

[0156] By employing visual detectors, laser emitters, or radar detectors, the position signals of the retarder assembly 100 and the structure of the retarder assembly to be installed can be acquired in real time. The position signals are analyzed and compared by control elements, thereby automatically adjusting the positions of the transport device 710 and the lifting mechanism to ensure the installation accuracy of the retarder assembly 100. The control elements are computer devices capable of executing specified programs, such as commercially available microcontrollers like the STM32 or 51 microcontrollers, or CPU processors.

[0157] In one feasible embodiment of the present invention, as shown in FIG14, FIG15 and FIG16, the limiting device 720 includes a plurality of limiting posts 721, which are arranged at intervals around the lifting support device 730, and the limiting posts 721 are detachably mounted on the transport platform 711.

[0158] Specifically, multiple limiting posts 721 are arranged vertically and mounted on the transport platform 711. By arranging the multiple limiting posts 721 at intervals around the lifting support device 730, the limiting area formed by the multiple limiting posts 721 can be used to limit the deceleration body assembly 100, preventing the deceleration body assembly 110 from undergoing horizontal displacement during the lifting process, and ensuring the verticality of the deceleration body assembly 100 during the lifting process.

[0159] Furthermore, the limiting post 721 is detachably installed, which makes it easy to adjust the size of the limiting area by replacing the limiting post 721, so as to better meet the limiting needs of different sizes of retarder components 100 and have better flexibility of use.

[0160] Designers can adjust the specific structure and number of limit posts 721 according to usage needs, and no specific restrictions are imposed here. Preferably, the number of limit posts 721 is not less than three.

[0161] Since the limiting post 721 is set on the transport platform 711 and the limiting post 721 needs to limit the retarder assembly 100, in the initial position, the setting height of the limiting post 721 is usually greater than the height of the retarder assembly 100. Thus, the top of the limiting post 721 is the highest point of the retarder auxiliary installation system 30, and the top of the limiting post 721 is closer to the structure of the retarder assembly to be installed.

[0162] In an embodiment of the present invention, the position detection element 740 is disposed at the top of any of the limiting posts 721. By disposing the position detection element 740 at the top of the limiting post 721, the position detection element 740 can be placed closer to the structure of the retarder assembly to be installed, which helps to reduce the measurement distance and improve detection accuracy.

[0163] Furthermore, the limiting post 721 is set on the transport platform 711. For a given retarder auxiliary installation system 30, the height of the limiting post 721 remains fixed, so that the height difference between the position detection element 740 and the structure of the retarder assembly to be installed will not change, thereby reducing variables in the detection process and improving detection accuracy.

[0164] Furthermore, multiple position detection elements 740 are provided, and each of the multiple position detection elements 740 is respectively disposed at the top of a different limiting post 721. By having multiple position detection units 740 cooperate to detect position signals, better detection accuracy is achieved, ensuring the accuracy of the position signals, and thus improving the installation accuracy of the deceleration body assembly 100.

[0165] In another feasible embodiment of the present invention, the limiting device 720 includes a plurality of limiting plates, which are spaced apart around the lifting support device 730 and are detachably mounted on the transport platform 711.

[0166] In another feasible embodiment of the present invention, the limiting device 720 includes a plurality of limiting frames, which are spaced apart around the lifting support device 730 and are detachably mounted on the transport platform 711.

[0167] In an embodiment of the present invention, the lifting mechanism includes a liftable lifting member 732 and a lifting drive assembly for driving the lifting member 732, with a support platform 731 provided on the top of the lifting member 732. The lifting drive assembly is housed within the transport device 710 and is not shown.

[0168] Designers may adjust the specific structure of the lifting component 732 and the lifting drive assembly according to usage requirements, without imposing specific limitations. For example, the lifting drive assembly may include an electric lifting assembly, a hydraulic lifting assembly, or a pneumatic lifting assembly.

[0169] In one feasible embodiment, the lifting drive assembly is a hydraulic lifting assembly or a pneumatic lifting assembly, and the lifting component 732 is a telescopic rod.

[0170] In another feasible embodiment, the lifting drive assembly is an electric lifting assembly, which includes an electric motor and the lifting component 732 includes a lead screw, thereby driving the lead screw to perform lifting motion via the electric motor.

[0171] In an embodiment of the present invention, the slow-moving body auxiliary installation system 30 further includes a buffer mechanism 750 disposed between the lifting member 732 and the supporting platform 731.

[0172] By setting the buffer mechanism 750 between the lifting component 732 and the supporting platform 731, the supporting platform 731 and the lifting component 732 can be adaptively and elastically adjusted. When the equipment malfunctions or the parameters are selected incorrectly, an accidental collision may occur during the lifting of the deceleration body assembly 100. By setting the buffer mechanism 750, the collision pressure on the surface of the deceleration body assembly 100 during the accidental collision can be reduced, thereby reducing the risk of the deceleration body assembly 100 being damaged by pressure.

[0173] Designers may adjust the specific structure of the buffer mechanism 750 according to usage requirements, and no specific limitations are imposed here. In one feasible embodiment, the buffer mechanism 750 includes an elastic element, such as a spring or elastic block, disposed between the support platform 731 and the lifting member 732.

[0174] In an embodiment of the present invention, the slow-moving body auxiliary installation system 30 further includes a pressure detection element disposed on the support platform 731, the pressure detection element being electrically connected to a control element; the control element is capable of controlling the lifting and lowering movement of the lifting mechanism based on the pressure value obtained by the pressure detection element.

[0175] The pressure detection element can monitor and provide feedback on the pressure value on the support platform 731 in real time. The control element then controls the lifting mechanism's movement based on this pressure value, facilitating precise, safe, and automated lifting control and improving control efficiency. Furthermore, when the acquired pressure value exceeds a preset pressure value, which can be set according to the weight of the retarder assembly 100 to be installed, the control element can also stop the lifting mechanism if the retarder assembly 100 is squeezed or collided with other structures during the lifting process, thereby avoiding or reducing damage to the retarder assembly 100.

[0176] Designers can adjust the specific structure of the pressure sensing element according to the application requirements, and no specific restrictions are imposed here. For example, the pressure sensing element includes a pressure sensor.

[0177] In one feasible embodiment of the present invention, the slow-moving body auxiliary installation system 30 further includes an alarm device, which is electrically connected to a pressure detection element. When the pressure value obtained by the pressure detection element exceeds a preset pressure value, the alarm device issues an alarm signal.

[0178] The alarm device emits alarm signals, providing real-time monitoring and timely warnings to alert operators to abnormal situations and prevent damage to the retarder assembly 100. Simultaneously, the alarm device can trigger an emergency stop mechanism to immediately halt equipment movement and prevent further damage or accidents.

[0179] In another feasible embodiment of the present invention, the deceleration body auxiliary installation system 30 further includes an alarm device electrically connected to the position detection element 740. When the position detection element 740 detects a deviation between the positional relationship between the deceleration body assembly 100 and the structure of the deceleration body assembly to be installed and a preset positional relationship, the alarm device issues an alarm signal. When the deceleration body assembly 100 and the structure of the deceleration body assembly to be installed meet the preset positional relationship, the deceleration body assembly 100 can be smoothly and unobstructedly installed within the structure of the deceleration body assembly to be installed.

[0180] The position detection element 740 can detect the positional relationship between the retarder assembly 100 and the structure of the retarder assembly to be installed in real time. When the detected positional relationship deviates from the preset positional relationship, and the installation requirements of the retarder assembly 100 cannot be met, the alarm device will issue an alarm signal to alert the operator to the current abnormal state. Simultaneously, the alarm device can also trigger an emergency stop mechanism to immediately stop the movement of the equipment and prevent further damage or accidents.

[0181] In an embodiment of the present invention, as shown in Figures 14 and 17, the slow-moving body auxiliary installation system 30 further includes an adjustment and positioning device 760 disposed on the transport device 710. The adjustment and positioning device 760 includes a plurality of adjustment mechanisms for adjusting the position of the transport platform 711.

[0182] Designers can adjust the specific number and arrangement of the regulating mechanisms according to usage needs, and no specific restrictions are imposed here. For example, two, three, four, or other numbers of regulating mechanisms can be set.

[0183] By setting the positioning device 760 on the transport device 710, the position of the transport platform 711, especially the horizontal angle of the transport platform 711, can be adjusted by the multiple adjustment mechanisms of the positioning device 760, so that the transport platform 711 can be in a horizontal position when installed, and thus the retarder assembly 100 can also be in a horizontal position, which helps to improve the installation accuracy of the retarder assembly 100.

[0184] Specifically, the adjustment mechanism includes an adjustment member 761 disposed at the bottom of the transport device 710, and an adjustment drive assembly for driving the adjustment member 761. The length of the adjustment member 761 extending out of the bottom of the transport device 710 is adjustable. The adjustment drive assembly is located inside the transport device 710 and is not shown.

[0185] Designers can adjust the specific structure of the adjustment mechanism according to usage requirements, and no specific restrictions are imposed here. For example, the adjustment drive component includes an electric adjustment mechanism, a hydraulic adjustment mechanism, or a pneumatic adjustment mechanism, etc.

[0186] In one feasible embodiment, the adjustment drive assembly is a hydraulic adjustment assembly or a pneumatic adjustment assembly, and the adjustment element 761 is a telescopic rod.

[0187] In another feasible embodiment, the adjustment drive assembly is an electric adjustment assembly, which includes an electric motor and the adjustment element 761 includes a lead screw, thereby driving the lead screw to perform lifting and lowering movements by the electric motor.

[0188] In an embodiment of the present invention, the slow-moving body auxiliary installation system 30 further includes a display element 770 and / or an operation button 780 disposed on the transport device 710, wherein the display element 770 and / or the operation button 780 are electrically connected to the control element.

[0189] Preferably, both the display element 770 and the operation button 780 are mounted on the transport device 710. By mounting the display element 770 and the operation button 780 on the transport device 710, the status of each mechanism can be efficiently controlled and various operations and results can be visualized. Specifically, the display element 770 can display the real-time working status of each mechanism, alarm prompts, and other information, and can also provide operation guidance.

[0190] Furthermore, the operation button 780 facilitates operators in executing commands such as start, stop, lifting, and movement, and can be expanded with emergency stop function and mode switching options, thereby improving operational convenience and user-friendliness, and helping to increase the reliability and response speed of the equipment.

[0191] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0192] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A beam shaping device, characterized in that, include: The retarder assembly is used for energy modulation of the neutron beam; The beam shaping device has a receiving cavity, and the decelerating body assembly is disposed in the receiving cavity; The beam shaping device further includes a fixing mechanism for fixing the retarder assembly in the receiving cavity.

2. The beam shaping device as described in claim 1, characterized in that, The retarder assembly includes a first retarder unit disposed in the receiving cavity. The receiving cavity includes a first wall that is circumferentially closed and extends along a preset direction and a second wall that is perpendicular to the preset direction. The neutron beam has a central axis N, and the preset direction is parallel to the central axis N. The fixing mechanism includes a first snap-fit ​​structure disposed in the first wall of the receiving cavity. The first snap-fit ​​structure can prevent the first retarder unit from displacing along the preset direction.

3. The beam shaping device as described in claim 2, characterized in that, The first snap-fit ​​structure includes a rotating member and a snap-fit ​​member disposed on the rotating member. The first wall of the receiving cavity is provided with a first receiving groove extending along the preset direction. The first receiving groove is connected to the receiving cavity. The rotating member is disposed in the first receiving groove. The rotating member can drive the snap-fit ​​member to switch between a locked position and an unlocked position. In the locked position, at least a portion of the snap-fit ​​member extends out of the first receiving groove. In the unlocked position, the latch is entirely accommodated within the first receiving groove.

4. The beam shaping device as described in claim 3, characterized in that, The rotating component is threadedly connected to the snap-fit ​​component, and a limiting part is provided on one side of the snap-fit ​​component; When the latching member is in the locked position, the limiting part slidably abuts against the inner wall of the first receiving groove, the latching member can move along the axial direction of the rotating member under the rotation drive of the rotating member, the latching member abuts against the first retarder unit and prevents the first retarder unit from displacing along the preset direction; When the latching member is in the unlocked position, the limiting part disengages from the inner wall of the first receiving groove, and the latching member is entirely received in the first receiving groove.

5. The beam shaping device as described in claim 2, characterized in that, The first retarder unit includes multiple first retarder sub-units, which are sheet-like structures and are stacked on top of each other.

6. The beam shaping device as described in claim 2, characterized in that, The beam shaping device further includes a charged particle beam channel, which passes through the second wall of the receiving cavity along the charged particle beam travel direction and communicates with the receiving cavity. At least a portion of the charged particle beam channel extends into the receiving cavity to form an extension section. The deceleration body assembly further includes a second deceleration body unit, which is disposed around the extension section. The fixing mechanism includes a second snap-fit ​​structure disposed in the receiving cavity, which can prevent the second deceleration body unit from displacing along the preset direction.

7. The beam shaping device as described in claim 6, characterized in that, The second snap-fit ​​structure includes a limiting member. A limiting groove is provided on the first wall of the receiving cavity. The limiting groove is perpendicular to the preset direction and communicates with the receiving cavity. The limiting member is detachably inserted into the limiting groove. At least a portion of the limiting member extends into the receiving cavity. The portion of the limiting member extending into the receiving cavity can abut against the second retarder unit and prevent the second retarder unit from displacing along the preset direction.

8. The beam shaping device as described in claim 6, characterized in that, The second retarder unit includes multiple second retarder sub-units, which are arranged in a ring structure and are stacked on top of each other.

9. A neutron capture therapy system, comprising: Charged particle beam generating unit, used to generate charged particle beams; Neutron generating section, used to generate a neutron beam by interacting with a beam of charged particles; A beam transmission unit is used to transmit the charged particle beam generated by the charged particle beam generation unit to the neutron generation unit. A beam shaping device includes a retarder assembly for adjusting the energy of a neutron beam; a receiving cavity is formed within the beam shaping device, and the retarder assembly is disposed within the receiving cavity; The beam shaping device is characterized in that it further includes a fixing mechanism for fixing the decelerating body assembly in the receiving cavity.

10. The neutron capture therapy system as described in claim 9, characterized in that, The neutron capture therapy system also includes an irradiation chamber for accommodating the irradiated body receiving neutron beam irradiation; and a beam transmission chamber for accommodating the beam transmission unit. The irradiation chamber includes a vertical irradiation chamber, and the beam transmission chamber is located above the vertical irradiation chamber; The beam shaping device is vertically installed at the top of the vertical irradiation chamber, and the fixing mechanism is used to limit and fix the decelerating body assembly in the vertical direction.

11. The neutron capture therapy system as described in claim 10, characterized in that, The retardant assembly includes a first retardant unit disposed in the receiving cavity. The receiving cavity includes a first wall that is circumferentially closed and extends in the vertical direction and a second wall that is disposed in the horizontal direction. The fixing mechanism includes a first snap-fit ​​structure disposed in the first wall of the receiving cavity. The first snap-fit ​​structure can prevent the first retardant unit from displacing in the vertical direction.

12. The neutron capture therapy system as described in claim 11, characterized in that, The beam shaping device further includes a charged particle beam channel that passes vertically through the second wall of the receiving cavity and communicates with the receiving cavity. At least a portion of the charged particle beam channel extends into the receiving cavity to form an extension section. The deceleration body assembly further includes a second deceleration body unit that is disposed around the extension section. The fixing mechanism includes a second snap-fit ​​structure disposed within the receiving cavity that can prevent the second deceleration body unit from displacing in the vertical direction.

13. A slowing body-assisted installation system for installing a beam shaping device, characterized in that, The beam shaping device includes a slowing body assembly for adjusting the energy of the neutron beam; The beam shaping device has a receiving cavity, and the decelerating body assembly is disposed in the receiving cavity; The beam shaping device further includes a fixing mechanism for fixing the decelerating body assembly in the receiving cavity.

14. The slow-moving body assisted installation system as described in claim 13, characterized in that, The slow-moving body auxiliary installation system includes: A transport device, wherein a transport platform is provided on the transport device; A limiting device is provided on the transport platform; A lifting support device is provided on the transport device. The lifting support device is used to support and lift the deceleration body assembly, so that the deceleration body assembly moves closer to or away from the receiving cavity in the vertical direction. A control device for controlling the horizontal movement of the transport device and / or the lifting movement of the lifting support device.

15. The slow-moving body assisted installation system as described in claim 13, characterized in that, The lifting support device includes a support platform for supporting the decelerating body assembly, and a lifting mechanism disposed below the support platform.

16. The slow-moving body assisted installation system as described in claim 15, characterized in that, The control device includes a control element and a position detection element. The control element is electrically connected to the position detection element, the transport device, and the lifting mechanism, respectively. The control element can control the horizontal movement of the transport device and / or the lifting movement of the lifting mechanism based on the position signals of the deceleration body assembly and the receiving cavity obtained by the position detection element.

17. The slow-moving body assisted installation system as described in claim 15, characterized in that, The slow-moving body auxiliary installation system also includes a buffer mechanism disposed between the lifting mechanism and the supporting platform.

18. The slow-moving body assisted installation system as described in claim 15, characterized in that, The slow-moving body auxiliary installation system also includes a pressure detection element disposed on the support platform, the pressure detection element being electrically connected to the control element; the control element is capable of controlling the lifting and lowering movement of the lifting mechanism based on the pressure value obtained by the pressure detection element.

19. The slow-moving body assisted installation system as described in claim 16 or 18, characterized in that, The slow-moving body auxiliary installation system also includes an alarm device electrically connected to the pressure detection element. When the pressure value detected by the pressure detection element exceeds a preset pressure value, the alarm device issues an alarm signal; or The alarm device is electrically connected to the position detection element. When the position detection element detects a deviation between the positional relationship between the retarder assembly and the receiving cavity and a preset positional relationship, the alarm device issues an alarm signal.

20. The slow-moving body assisted installation system as described in claim 14, characterized in that, The slowing body auxiliary installation system also includes an adjustment and positioning device disposed on the transport device. The adjustment and positioning device includes multiple adjustment mechanisms, which are used to adjust the horizontal angle of the transport platform.

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