Drawing device for beam distribution system

Abstract

The invention relates to the technical field of ion accelerator radiotherapy, in particular to a drawing device for a beam distribution system. The drawing device comprises a shell assembly, a push rod assembly and a push rod assembly, wherein one end of the shell assembly is open; one end of the ionization chamber tray is inserted into the shell assembly through the opening; the two sliding assemblies are symmetrically arranged on the two sides of the ionization chamber tray and are respectively connected with the shell assembly; wherein the ionization chamber tray is provided with a receiving groove used for installing a beam detector, the shell assembly is provided with a square hole, and when the ionization chamber tray is embedded in the shell assembly, the square hole is aligned with the receiving groove. According to the beam detector, the bearing groove is formed in the ionization chamber tray, the ionization chamber tray is installed on the shell assembly in the drawable mode, the beam detector can be rapidly installed and replaced, meanwhile, the drawing device is light in structure and easy and convenient to operate, and repeated positioning precision can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of ion accelerator radiotherapy, in particular to a drawing device for a beam distribution system. Background Art

[0002] Ion beam radiotherapy offers advantages unmatched by conventional radiotherapy methods, such as unique deep dose distribution and high relative biological effect. It has been dubbed "the most ideal medical radiotherapy beam of the 21st century." The beam delivery system is the hardware infrastructure for ion beam radiotherapy and a crucial component of ion accelerator therapy. It handles beam delivery, monitoring, commissioning, collimation, and metrology monitoring. Currently, two types of beam delivery methods are used in ion therapy: active and passive. Accelerators using passive beam delivery systems deliver a fixed beam energy each time. Range shifters placed on the beam delivery module adjust the ion beam energy to achieve varying penetration depths. The beam is then expanded laterally to create a larger irradiation field, which is then intercepted by a collimator for real-time irradiation. Accelerators using active beam delivery systems, on the other hand, can actively vary the ion beam energy, thereby adjusting the penetration depth of the ion beam in the body, enabling conformal or intensity-modulated irradiation therapy of target tumors.

[0003] In addition, passive beam delivery systems have many components and occupy a large space. In contrast, active beam delivery systems have fewer components, a compact structure, and are suitable for multi-angle treatment layouts. In addition, active variable energy point scanning is a precise scan that places high demands on the beam and beam delivery system equipment. Currently, internationally, the installation and rapid replacement technology of beam delivery systems mainly adopts motor drive and modular design, and adopts position monitors, magnetic quick-change modules and other means to achieve high-precision positioning and rapid replacement. Domestically, there are pneumatic pin locking modules and standardized aluminum profile frames that are compatible with a variety of diagnostic components and reduce maintenance costs.

[0004] See also Figure 1 As shown in the figure, for a treatment terminal in which three beam delivery systems are installed simultaneously in one treatment room, the traditional passive beam delivery system is difficult to apply due to its complex structure and large space occupation. In addition, the passive beam delivery system is close to the target, the radiation dose is large, the electric mode is easily affected by radiation, failures occur frequently, maintenance and recovery are slow, and replacement efficiency is low, which affects the treatment efficiency. Summary of the Invention

[0005] The present invention aims to solve the technical problems existing in the related art. To this end, the present invention proposes a pull-out device for a beam delivery system to enable rapid installation and replacement of beam detectors such as stripe ionization chambers and dose ionization chambers, thereby reducing the incidence of failures and simplifying maintenance.

[0006] The present invention provides a drawing device for a beam distribution system, the drawing device comprising: A housing assembly, one end of which is configured as an open opening; an ionization chamber tray, one end of which is inserted into the housing assembly through the open opening; Sliding assemblies, two of which are symmetrically mounted on both sides of the ionization chamber tray and are respectively connected to the housing assembly; The ionization chamber tray is provided with a receiving groove for mounting a beam detector, and the housing assembly is provided with a square hole, and when the ionization chamber tray is embedded in the housing assembly, the square hole is aligned with the receiving groove; The sliding assembly includes a guide rail and a slider, wherein the guide rail extends from one end of the ionization chamber tray to the other end of the ionization chamber tray, and the slider is fixed to the housing assembly and slidably connected to the guide rail; It also includes a limiting plate, which is arranged on the end surface of the ionization chamber tray away from the open port; One end of the limiting plate is connected to the ionization chamber tray, and the other end of the limiting plate extends toward and protrudes from the guide rail to prevent the slider from separating from the guide rail; It also includes a locking assembly, one end of which is arranged on the housing assembly, and the other end of which is arranged on the ionization chamber tray.

[0007] According to a drawing device for a beam distribution system provided by the present invention, the housing assembly is configured as a box structure consisting of a top plate, a bottom plate, a first side plate, a second side plate and a back plate; The back plate is located at an end away from the open opening, and the first side plate and the second side plate are both provided with the square hole.

[0008] According to the pulling device for a beam distribution system provided by the present invention, the ionization chamber tray is arranged parallel to the first side plate.

[0009] According to a pulling and drawing device for a beam distribution system provided by the present invention, the locking assembly includes a clamp, a claw and a ball rod, the clamp is installed on the base plate, the claw is embedded in the clamp, and the ball rod is arranged on the end face of the ionization chamber tray away from the open mouth.

[0010] According to a pulling device for a beam delivery system provided by the present invention, the beam detector includes a stripe ionization chamber for obtaining dose distribution.

[0011] According to the pulling device for a beam delivery system provided by the present invention, the beam detector further includes a dose ionization chamber for measuring radiation dose.

[0012] According to a pulling device for a beam delivery system provided by the present invention, the three ionization chamber trays are arranged in parallel and spaced apart in the housing assembly, the two dose ionization chambers are installed back to back on the ionization chamber tray in the middle position, and the two strip ionization chambers are respectively installed on the ionization chamber trays at both sides.

[0013] The above one or more technical solutions in the present invention have at least one of the following technical effects: The pulling device of the present invention utilizes a mechanical structure to achieve independent arrangement of multiple components in sequence without affecting each other.

[0014] The pulling device of the present invention can realize the rapid installation and rapid replacement of beam detectors such as stripe ionization chambers and dose ionization chambers, does not require collimation measurement, is simple to maintain, and is highly efficient.

[0015] The pulling device in the present invention is a purely mechanical structure, has strong radiation resistance and high reliability.

[0016] The pulling device of the present invention has mechanical limiting and locking functions, which can ensure high repeat positioning accuracy.

[0017] The pulling device of the present invention has a light structure and is easy to operate, which greatly reduces the replacement time and is one of the effective means to reduce the radiation dose of workers.

[0018] The pulling device of the present invention can be applied to both active beam distribution systems and passive beam distribution systems, and has wide applicability.

[0019] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted, and the advantages brought about by the technical features of these technical solutions described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings, or can be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is an axonometric diagram of the treatment terminal provided in an embodiment of the present invention.

[0022] Figure 2A three-dimensional structural diagram of a drawing device for a beam distribution system provided in an embodiment of the present invention.

[0023] Figure 3 A cross-sectional view of a pulling device provided in an embodiment of the present invention.

[0024] Figure 4 A front view of a pulling device provided in an embodiment of the present invention.

[0025] Figure 5 for Figure 4 Cross-sectional view of the middle pull-out device along section AA.

[0026] Figure 6 A partially enlarged view of the limiting plate in the pulling device provided in an embodiment of the present invention.

[0027] Figure 7 A partially enlarged view of the locking assembly in the pulling device provided in an embodiment of the present invention.

[0028] Figure 8 A cross-sectional view of a locking assembly provided in accordance with an embodiment of the present invention.

[0029] Reference numerals: 1. Shell assembly; 101. Top plate; 102. Bottom plate; 103. Back plate; 104. First side plate; 105. Square hole; 106. Second side plate; 2. Sliding assembly; 201. Guide rail; 202. Slider; 3. Ionization chamber tray; 4. Limit plate; 5. Locking assembly; 501. Clamp; 502. Claw; 503. Ball rod; 6. Strip ionization chamber; 7. Dose ionization chamber. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] See also Figure 1 As shown, the pull-out device for the beam delivery system is installed on three angled treatment terminals: horizontal treatment terminal H, inclined treatment terminal I, and vertical treatment terminal V. Three pull-out devices P are installed on each treatment terminal in a corresponding manner.

[0032] In an embodiment of the present invention, a pulling device for a beam distribution system is introduced.

[0033] See also Figures 2 to 5As shown, the pulling device mainly includes a housing assembly 1 , an ionization chamber tray 3 and a sliding assembly 2 .

[0034] One end of the housing assembly 1 is open. One end of the ionization chamber tray 3 is inserted into the housing assembly 1 through the open end. Two sliding assemblies 2 are symmetrically mounted on either side of the ionization chamber tray 3. Furthermore, the two sliding assemblies 2 are respectively connected to the housing assembly 1.

[0035] In particular, the ionization chamber tray 3 is provided with a receiving groove for mounting the beam detector. The housing assembly 1 is provided with a square hole 105. The position and size of the receiving groove and the square hole 105 correspond to the effective detection area of ​​the treatment terminal.

[0036] When the ionization chamber tray 3 is embedded in the housing assembly 1 , the square hole 105 is aligned with the receiving groove, thereby ensuring that the beam passes through the receiving groove and the square hole 105 and penetrates the pulling device.

[0037] Furthermore, the housing assembly 1 is configured as a box structure consisting of a top plate 101 , a bottom plate 102 , a first side plate 104 , a second side plate 106 and a back plate 103 .

[0038] The back plate 103 is located at one end away from the open mouth. The first side plate 104 and the second side plate 106 are both provided with square holes 105.

[0039] The ionization chamber tray 3 is arranged parallel to the first side plate 104 .

[0040] Furthermore, the beam detector includes a stripe ionization chamber 6 for obtaining dose distribution.

[0041] The beam detector further includes a dose ionization chamber 7 for measuring radiation dose.

[0042] When using the pull-out device, first install it on the treatment terminal at any angle. Simultaneously, adjust the relative positions of the housing assembly 1 and the treatment terminal so that the center of the square hole 105 coincides with the beam centerline. Then, pull out the ionization chamber tray 3. When the receiving slot of the ionization chamber tray 3 is located outside the housing assembly 1, the stripe ionization chamber 6 or dose ionization chamber 7 can be installed or removed from the ionization chamber tray 3. Finally, push the ionization chamber tray 3 into the housing assembly 1.

[0043] Furthermore, three ionization chamber trays 3 are arranged in parallel and at intervals in the housing assembly 1 .

[0044] The two dose ionization chambers 7 are mounted back to back on the ionization chamber tray 3 in the middle. The two stripe ionization chambers 6 are mounted on the ionization chamber trays 3 at both sides.

[0045] Preferably, the housing assembly is made of a lightweight metal sheet, such as duralumin. The top plate 101 and the bottom plate 102 are provided with a strip interface for connecting with the bracket.

[0046] In this embodiment, by providing a receiving groove on the ionization chamber tray 3 and allowing the ionization chamber tray 3 to be pulled out and installed on the housing assembly 1, the beam detector can be quickly installed and replaced. At the same time, the pulling device has a light structure, is easy to operate, and can ensure repeated positioning accuracy.

[0047] Based on the above embodiment, another embodiment of the present invention introduces a pulling device for a beam distribution system.

[0048] The sliding assembly 2 includes a guide rail 201 and a slider 202 .

[0049] The guide rail 201 extends from one end of the ionization chamber tray 3 to the other end of the ionization chamber tray 3. The slider 202 is fixed to the housing assembly 1 and is slidably connected to the guide rail 201.

[0050] Furthermore, the pulling device also includes a limiting plate 4.

[0051] See also Figures 3 to 6 As shown, the limiting plate 4 is arranged on the end surface of the ionization chamber tray 3 facing away from the opening.

[0052] One end of the limiting plate 4 is connected to the ionization chamber tray 3. The other end of the limiting plate 4 extends toward the guide rail 201 and protrudes, so as to prevent the slider 202 from separating from the guide rail 201.

[0053] When the limit plate 4 contacts the slider 202 , the ionization chamber tray 3 reaches the maximum displacement. At this time, the stripe ionization chamber 6 or the dose ionization chamber 7 can be installed or removed from the ionization chamber tray 3 .

[0054] Based on the above embodiment, another embodiment of the present invention introduces a pulling device for a beam distribution system.

[0055] The pulling device further includes a locking assembly 5. One end of the locking assembly 5 is disposed on the housing assembly 1. The other end of the locking assembly 5 is disposed on the ionization chamber tray 3. The locking assembly 5 is used to prevent the ionization chamber tray 3 from sliding outward and shifting position.

[0056] See also Figure 7 As shown, the locking assembly 5 includes a clamp 501 , a claw 502 and a ball rod 503 .

[0057] The clamp 501 is mounted on the bottom plate 102. A spring is provided inside the clamp 501. The claw 502 is embedded in the clamp 501. The ball rod 503 is provided on the end face of the ionization chamber tray 3 facing away from the opening.

[0058] When the ionization chamber tray 3 moves into the housing assembly 1 and approaches the back plate 103, the ball rod 503 presses against the claw 502, and the claw 502 grips the ball rod 503, thus achieving a locking function. The ball rod 503 presses against the claw 502 again, releasing the claw 502, and the ionization chamber tray 3 can be easily pulled out, making the ionization chamber tray 3 and the housing assembly 1 very convenient to connect and disconnect.

[0059] See also Figure 8 As shown, two claws 502 are movably mounted on the clamp 501 in a scissor-like manner. One end of the claw 502 extends and protrudes outside the clamp 501, and the other end of the claw 502 is located in the cavity of the clamp 501.

[0060] A spring 504 is disposed within the cavity of the gripper 501. Two springs 504 are located on either side of the gripper 501. Furthermore, the springs 504 engage with the other ends of the claws 502, ensuring that the ends of the two claws 502 protruding from the gripper 501 always rotate toward the closed position of the gripping rod 503.

[0061] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0062] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0063] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not limited to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pulling device for a beam distribution system, characterized in that: include: A housing assembly (1), wherein one end of the housing assembly (1) is configured as an open opening; an ionization chamber tray (3), one end of the ionization chamber tray (3) being inserted into the housing assembly (1) through the open opening; Sliding assemblies (2), two sliding assemblies (2) are symmetrically mounted on both sides of the ionization chamber tray (3) and are respectively connected to the housing assembly (1); The ionization chamber tray (3) is provided with a receiving groove for mounting a beam detector, the housing assembly (1) is provided with a square hole (105), and when the ionization chamber tray (3) is embedded in the housing assembly (1), the square hole (105) is aligned with the receiving groove; The sliding assembly (2) comprises a guide rail (201) and a slider (202), wherein the guide rail (201) extends from one end of the ionization chamber tray (3) to the other end of the ionization chamber tray (3), and the slider (202) is fixed to the housing assembly (1) and is slidably connected to the guide rail (201); It also includes a limiting plate (4), which is arranged on the end surface of the ionization chamber tray (3) facing away from the open opening; One end of the limiting plate (4) is connected to the ionization chamber tray (3), and the other end of the limiting plate (4) extends toward and protrudes from the guide rail (201) to prevent the slider (202) from detaching from the guide rail (201); It also includes a locking assembly (5), one end of the locking assembly (5) is arranged on the housing assembly (1), and the other end of the locking assembly (5) is arranged on the ionization chamber tray (3).

2. The drawing device for a beam distribution system according to claim 1, characterized in that: The housing assembly (1) is configured as a box structure consisting of a top plate (101), a bottom plate (102), a first side plate (104), a second side plate (106), and a back plate (103); The back plate (103) is located at an end away from the open opening, and the first side plate (104) and the second side plate (106) are both provided with the square hole (105).

3. The drawing device for a beam distribution system according to claim 2, characterized in that: The ionization chamber tray (3) is arranged parallel to the first side plate (104).

4. The drawing device for a beam distribution system according to claim 3, characterized in that: The locking assembly (5) comprises a clamp (501), a claw (502) and a ball rod (503), wherein the clamp (501) is mounted on the base plate (102), the claw (502) is embedded in the clamp (501), and the ball rod (503) is arranged on the end surface of the ionization chamber tray (3) away from the opening.

5. The drawing device for a beam distribution system according to any one of claims 1 to 3, characterized in that: The beam detector comprises a stripe ionization chamber (6) for acquiring dose distribution.

6. The drawing device for a beam distribution system according to claim 5, characterized in that: The beam detector further comprises a dose ionization chamber (7) for measuring radiation dose.

7. The drawing device for a beam distribution system according to claim 6, characterized in that: The three ionization chamber trays (3) are arranged in parallel and spaced apart in the housing assembly (1); the two dose ionization chambers (7) are mounted back to back on the ionization chamber tray (3) at the middle position; and the two stripe ionization chambers (6) are mounted on the ionization chamber trays (3) at the two side positions, respectively.

Images