Variable-radiation-field electron ray source applicator and radiotherapy equipment

Abstract

The utility model relates to a variable radiation field electron ray source applicator and radiotherapy equipment, the electron ray source applicator comprises a light limiting cylinder, a shielding blade group and a driving assembly, the end part of the light limiting cylinder is provided with a rotating cylinder which is rotatably connected with the light limiting cylinder, the shielding blade group is arranged at the joint of the light limiting cylinder and the rotating cylinder, and the driving assembly is connected with the shielding blade group. The shielding blade set comprises a plurality of shielding blades, the shielding blades are sequentially arranged in the plane to define a radiation field hole, the shielding blades are in linkage with the rotating cylinder so as to change the aperture of the radiation field hole, and the driving assembly is connected with the rotating cylinder and used for driving the rotating cylinder to rotate. The technical problems that in the prior art, a light limiting barrel with a fixed aperture is difficult to adapt to tumors of different shapes and sizes, and when light limiting barrels of different sizes are replaced to adjust the radiation field, operation is tedious, consumed time is long, and errors are prone to being introduced can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of radiotherapy equipment technology, specifically relating to an electron beam applicator with variable field and radiotherapy equipment. Background Technology

[0002] In radiotherapy, which is widely practiced in clinical practice, there is an important concept: the radiation field. In radiotherapy, a beam of radiation enters the patient's body through the skin and irradiates the lesion area (called the target area). The radiation field is the area on the patient's body surface that the doctor wants the beam to irradiate. During radiotherapy, the shape of the radiation field should be matched to the shape of the target area as closely as possible (this is called a conformal radiation field). Otherwise, it may damage organs near the target area or even endanger the patient's life.

[0003] In the field of radiotherapy, precise control of the radiation field and optimization of dose distribution are crucial for improving treatment efficacy and reducing complications. While existing radiotherapy techniques can effectively irradiate tumors to a certain extent, they still have some limitations. First, traditional beam limiters typically have a fixed aperture, which limits their flexibility in adapting to tumors of different shapes and sizes. The effectiveness of radiotherapy largely depends on the optimization of dose distribution; ideally, the tumor area receives a sufficient dose to destroy cancer cells, while the surrounding normal tissue receives as little radiation as possible. However, due to the irregularity of tumor shapes and size variations, fixed-aperture beam limiters struggle to achieve ideal dose distribution. Second, adjusting the radiation field by changing beam limiters of different sizes not only reduces treatment efficiency but also increases operational complexity. Furthermore, the replacement process can introduce errors, affecting the precision of radiotherapy. Utility Model Content

[0004] To address the shortcomings of existing technologies, a variable-field electron beam applicator and radiotherapy device are proposed to solve the technical problems of existing technologies where fixed-aperture beam limiters are difficult to adapt to tumors of different shapes and sizes, and where changing beam limiters of different sizes to adjust the field of radiation is cumbersome, time-consuming, and prone to introducing errors.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] In a first aspect, this utility model provides an electron beam applicator with a variable field of radiation, comprising:

[0007] A light-limiting cylinder, the end of which is provided with a rotating cylinder rotatably connected thereto;

[0008] A shielding blade assembly is disposed at the connection between the light-limiting cylinder and the rotating cylinder. The shielding blade assembly includes multiple shielding blades, which are arranged sequentially in a plane to form a radiation field hole. The multiple shielding blades are linked with the rotating cylinder to change the aperture of the radiation field hole.

[0009] And a drive assembly, which is connected to the rotating cylinder and is used to drive the rotating cylinder to rotate.

[0010] The technical solution is further configured such that the firing aperture is a regular polygon, and the shielding blade corresponds one-to-one with the sides of the regular polygon.

[0011] The technical solution is further configured such that a sliding rod support is provided between the light-limiting cylinder and the rotating cylinder, the sliding rod support is provided with an upper sliding groove that forms an angle with its radial direction, and the shielding blade is provided with a guide post that can slide along the upper sliding groove.

[0012] The technical solution is further configured such that a sliding groove is provided inside the rotating cylinder, the sliding groove is configured as a regular polygon with the same shape as the firing hole, and a guide block that can slide along the sliding groove is provided on the shielding blade.

[0013] The technical solution is further configured such that a through hole is provided at the center of the slide bar bracket. When the guide post slides to the end of the upper slide groove adjacent to the through hole, and the guide block slides to the midpoint of the side length of the lower slide groove, the through hole is completely blocked by the shielding blade, and the diameter of the firing hole is minimized.

[0014] When the guide post slides to the end of the upper groove away from the through hole, and the guide block slides to the apex of the lower groove, the through hole is fully exposed and serves as the firing field hole with the maximum aperture.

[0015] The technical solution is further configured such that the shielding blade is a double-layer structure, including an upper blade and a lower blade, wherein the upper blade can shield the seam between adjacent lower blades.

[0016] The technical solution is further configured such that the light-limiting cylinder, the shielding blades, and the rotating cylinder are made of lightweight metal or plexiglass.

[0017] The technical solution is further configured such that the driving component includes a driving source, a driving gear, and a driven gear. The driving gear is connected to the output end of the driving source, the driven gear is coaxially arranged with the rotating cylinder, and the driven gear meshes with the driving gear.

[0018] The technical solution is further configured such that a marker is provided at the other end of the light-limiting cylinder, and at least three markers are provided, with the at least three markers spaced apart from each other and not collinear.

[0019] Secondly, this utility model provides a radiotherapy device, including the aforementioned variable field electron beam applicator.

[0020] The beneficial effects of this utility model are:

[0021] By setting multiple shielding blades linked with the rotating cylinder, the aperture of the radiation field can be gradually and continuously increased or decreased. The aperture of the radiation field can be changed without changing the applicator, thereby adjusting the aperture of the radiation field in real time according to different tumor shapes and sizes to optimize dose distribution and achieve better treatment results. The drive component drives the shielding blades to link with the rotating cylinder to adjust the aperture of the radiation field, which is simple to operate and helps to improve the efficiency of radiotherapy. At the same time, it can avoid introducing operational errors that affect the accuracy of radiotherapy. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the variable field electron beam applicator in an embodiment of this utility model;

[0023] Figure 2 yes Figure 1 Sectional view of AA;

[0024] Figure 3 This is an assembly diagram of the shielding blade assembly, the sliding rod support, and the rotating cylinder in an embodiment of this utility model;

[0025] Figure 4 yes Figure 3 Top view;

[0026] Figure 5 This is an assembly diagram of the shielding blade assembly and the sliding rod bracket in an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the slide bar bracket in an embodiment of this utility model;

[0028] Figure 7 This is an isometric view of the shielding blade in an embodiment of this utility model;

[0029] Figure 8 This is a bottom view of the shielding blade in an embodiment of this utility model;

[0030] Figure 9 This is a schematic diagram of the assembly of some shielding blades and rotating cylinder in an embodiment of this utility model.

[0031] In the attached diagram: 100, light-limiting cylinder; 200, rotating cylinder; 201, sliding groove; 300, shielding blade assembly; 301, shielding blade; 302, upper blade; 3021, first side of upper blade; 303, lower blade; 3031, tip; 3032, first side of tip; 3033, second side of tip; 304, guide block; 305, guide post; 400, drive assembly; 401, drive source; 402, drive gear; 403, driven gear; 500, marker; 600, slide bar bracket; 601, upper sliding groove; 602, through hole; 603, slide bar; 604, support frame; 700, firing hole. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0033] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0034] According to an embodiment of this utility model, a variable-field electron beam applicator is provided. Please refer to [link to relevant documentation]. Figures 1 to 4 ,include:

[0035] A light-limiting cylinder 100 has a rotating cylinder 200 rotatably connected to its end;

[0036] A shielding blade assembly 300 is disposed at the connection between the light-limiting cylinder 100 and the rotating cylinder 200, and the shielding blade assembly 300 is arranged radially along the light-limiting cylinder 100; the shielding blade assembly 300 includes a plurality of shielding blades 301, which are arranged sequentially in a plane to form a radiation field hole 700; the plurality of shielding blades 301 are linked with the rotating cylinder 200 to change the aperture of the radiation field hole 700;

[0037] And a drive assembly 400, which is connected to the rotating cylinder 200 and is used to drive the rotating cylinder 200 to rotate.

[0038] Furthermore, the light-limiting cylinder 100, the shielding blades 301, and the rotating cylinder 200 are made of lightweight metal or plexiglass. The light-limiting cylinder 100 is the main structure of the applicator, primarily used to confine the scattering of electron beams. In practical applications, the light-limiting cylinder 100 is supported and fixed on a light-limiting cylinder bracket, which is used to fix the applicator in the treatment position according to the user's needs. The shielding blades 301 are the main structure forming the radiation field 700. By adjusting the rotation angle and distance of the shielding blades 301, the shielding blade assembly 300 can form an approximately circular or regular polygonal shape.

[0039] It should be noted that by setting multiple shielding blades 301 linked with the rotating cylinder 200, the aperture of the radiation field 700 can be gradually and continuously increased or decreased. This allows for changing the aperture of the radiation field 700 without changing the applicator, enabling real-time adjustment of the aperture according to different tumor shapes and sizes to optimize dose distribution and achieve better treatment results. Furthermore, the drive assembly 400 drives the shielding blades 301 to link with the rotating cylinder 200 to adjust the aperture of the radiation field 700. This simple operation helps improve radiotherapy efficiency and avoids introducing operational errors that could affect the accuracy of radiotherapy.

[0040] In the variable field electron beam applicator of this embodiment, please refer to... Figures 1 to 4 The firing aperture 700 is a regular polygon, and the shielding blade 301 corresponds one-to-one with the edge of the regular polygon. That is, the number of shielding blades 301 is the same as the number of edges of the regular polygon, and one shielding blade 301 constitutes one edge of the regular polygon.

[0041] In this embodiment, the number of shielding blades 301 is 6, and the 6 shielding blades 301 are arranged and spliced ​​in sequence. Correspondingly, the firing hole 700 is a regular hexagon.

[0042] In other embodiments, the number of shielding blades 301 can also be set to 12-24.

[0043] In other embodiments, the number of shielding blades 301 can be set to more blades to be spliced ​​together to form an approximately circular firing hole 700.

[0044] In the variable field electron beam applicator of this embodiment, please refer to... Figures 1 to 8 A sliding rod bracket 600 is provided between the light-limiting cylinder 100 and the rotating cylinder 200. The sliding rod bracket 600 is provided with an upper sliding groove 601 that forms an angle with its radial direction. The shielding blade 301 is provided with a guide post 305 that can slide along the upper sliding groove 601. That is, the shielding blade 301 and the upper sliding groove 601 correspond one-to-one.

[0045] It should be noted that the slide rod bracket 600 is set in a circular shape, and a slide rod 603 with an angle to its radial direction is provided inside. An upper sliding groove 601 is provided on the slide rod 603 along its length direction. Specifically, the upper sliding groove 601 is a straight groove. The sliding displacement of the guide post 305 along the upper sliding groove 601 determines the rotation distance of the shielding blade 301.

[0046] In this embodiment, the number of shielding blades 301 is 6, and correspondingly, the number of slide rods 603 is 6. The 6 slide rods 603 are arranged in a radiating pattern around the center of the slide rod support 600.

[0047] In the variable field electron beam applicator of this embodiment, please refer to... Figures 1 to 9 The rotating cylinder 200 is provided with a sliding groove 201 inside. The sliding groove 201 is set as a regular polygon with the same shape as the firing hole 700. The shielding blade 301 is provided with a guide block 304 that can slide along the sliding groove 201.

[0048] Furthermore, the guide block 304 is located on the bottom surface of the shielding blade 301, while the guide post 305 is located on the top surface of the shielding blade 301. The guide block 304 slides along the groove edge of the sliding groove 201, and at the same time, the guide block 304 corresponds one-to-one with the groove edge of the sliding groove 201.

[0049] It should be noted that the drive assembly 400 drives the rotating cylinder 200 to rotate, and the lower slide groove 201 rotates synchronously. When the rotating cylinder 200 rotates clockwise, the guide block 304 slides along the lower slide groove 201, while the guide post 305 slides along the upper slide groove 601, and the shielding blade 301 rotates out counterclockwise, causing the firing aperture 700 to gradually and continuously increase. When the rotating cylinder 200 rotates counterclockwise, the firing aperture 700 gradually and continuously decreases. In addition, an angle of 90° or 0° is avoided between the upper slide groove 601 and the lower slide groove 201 to avoid creating dead points in the motion.

[0050] Furthermore, the slide rod bracket 600 is provided with a through hole bracket with a through hole 602 in the center. One end of the slide rod 603 is connected to the slide rod bracket 600, and the other end is connected to the through hole bracket.

[0051] In the initial state, the guide post 305 slides to the end of the upper sliding groove 601 adjacent to the through hole 602, and the guide block 304 slides to the midpoint of the side length of the lower sliding groove 201. Multiple shielding blades 301 converge at the center of the sliding rod bracket 600. At this time, the through hole 602 is completely blocked by the shielding blades 301, and the diameter of the firing hole 700 is minimized.

[0052] The rotating cylinder 200 rotates clockwise. When the guide post 305 slides to the end of the upper sliding groove 601 away from the through hole 602, and the guide block 304 slides to the top of the lower sliding groove 201, the shielding blade 301 rotates out to the limit position in the counterclockwise direction. The multiple shielding blades 301 are dispersed. At this time, the through hole 602 is completely exposed and serves as the maximum diameter firing hole 700.

[0053] In the variable field electron beam applicator of this embodiment, please refer to... Figures 1 to 9 The shielding blade 301 is configured as a double-layer structure, which includes an upper blade 302 and a lower blade 303. The upper blade 302 can shield the seam between adjacent lower blades 303.

[0054] It should be noted that multiple lower blades 303 located on the same plane form a regular polygonal radiation aperture 700, and the upper blade 302 precisely blocks the seam between two adjacent lower blades 303, thereby preventing electron leakage. During radiotherapy, the dose can be administered according to the predetermined radiotherapy plan, eliminating tumor tissue while protecting normal tissue.

[0055] Furthermore, the lower blade 303 has a pointed tip 3031, and the first side 3032 of the pointed tip serves as one side of the firing aperture 700. The second side 3033 of the pointed tip connects to the first side 3032 of the pointed tip of another lower blade 303. The first side 3021 of the upper blade is arranged parallel to the first side 3032 of the pointed tip. Simultaneously, the first side 3021 of the upper blade extends outward to cover the seam between adjacent lower blades 303. Furthermore, in the length direction, the first side 3021 of the upper blade does not extend to the pointed tip 3031 of the lower blade 303 to avoid affecting the shape of the firing aperture 700.

[0056] In the variable field electron beam applicator of this embodiment, please refer to... Figures 1 to 3 The drive assembly 400 includes a drive source 401, a drive gear 402, and a driven gear 403. The drive gear 402 is connected to the output end of the drive source 401. The driven gear 403 is coaxially arranged with the rotating cylinder 200 and meshes with the drive gear 402. During operation, the drive source 401 is activated, driving the drive gear 402 to rotate. Since the driven gear 403 meshes with the drive gear 402, it rotates accordingly. Because the driven gear 403 is coaxially arranged with the rotating cylinder 200, the rotating cylinder 200 rotates synchronously.

[0057] Furthermore, the slide bar bracket 600 extends outward to form a support frame 604, and the drive source 401 is disposed on the support frame 604. The drive source 401 is preferably a motor.

[0058] In some other embodiments, the drive assembly 400 may also employ other drive methods, as long as they are sufficient to drive the rotating cylinder 200 to rotate, such as sprocket and chain drive, synchronous pulley and synchronous belt drive, etc.

[0059] In the variable field electron beam applicator of this embodiment, please refer to... Figures 1 to 2 The other end of the light-limiting cylinder 100 is provided with a marker 500. At least three markers 500 are provided, and the at least three markers 500 are spaced apart from each other and are not collinear.

[0060] In actual use, the current image of the marker 500 is acquired by the image capturing device, the current image is processed and calculated, and the treatment device is controlled to move to a preset position above the source device according to the current image so that the treatment beam is aligned with the light limiting cylinder 100.

[0061] According to an embodiment of this utility model, a radiotherapy device is provided. Please refer to [link / reference needed]. Figures 1 to 9 This includes the electron beam applicator with the variable field of radiation.

[0062] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. An electron beam applicator with a variable field of radiation, characterized in that, include: A light-limiting cylinder, the end of which is provided with a rotating cylinder rotatably connected thereto; A shielding blade assembly is disposed at the connection between the light-limiting cylinder and the rotating cylinder. The shielding blade assembly includes multiple shielding blades, which are arranged sequentially in a plane to form a radiation field hole. The multiple shielding blades are linked with the rotating cylinder to change the aperture of the radiation field hole. And a drive assembly, which is connected to the rotating cylinder and is used to drive the rotating cylinder to rotate.

2. The variable-field electron beam applicator according to claim 1, characterized in that, The firing aperture is a regular polygon, and the shielding blades correspond one-to-one with the sides of the regular polygon.

3. The variable-field electron beam applicator according to claim 2, characterized in that, A sliding rod support is provided between the light-limiting cylinder and the rotating cylinder. The sliding rod support is provided with an upper sliding groove that forms an angle with its radial direction. The shielding blade is provided with a guide post that can slide along the upper sliding groove.

4. The variable-field electron beam applicator according to claim 3, characterized in that, The rotating cylinder has a sliding groove inside, which is a regular polygon with the same shape as the firing hole. The shielding blade is provided with a guide block that can slide along the sliding groove.

5. The variable-field electron beam applicator according to claim 4, characterized in that, The sliding rod bracket has a through hole at its center. When the guide post slides to the end of the upper sliding groove near the through hole and the guide block slides to the midpoint of the side length of the lower sliding groove, the through hole is completely blocked by the shielding blade, and the diameter of the firing hole is minimized. When the guide post slides to the end of the upper groove away from the through hole, and the guide block slides to the apex of the lower groove, the through hole is fully exposed and serves as the firing field hole with the maximum aperture.

6. The variable-field electron beam applicator according to claim 1, characterized in that, The shielding blade is configured as a double-layer structure, which includes an upper blade and a lower blade. The upper blade can block the seam between adjacent lower blades.

7. The variable-field electron beam applicator according to claim 1, characterized in that, The light-limiting cylinder, the shielding blades, and the rotating cylinder are made of lightweight metal or plexiglass.

8. The variable field electron beam applicator according to claim 1, characterized in that, The drive assembly includes a drive source, a drive gear, and a driven gear. The drive gear is connected to the output end of the drive source, and the driven gear is coaxially arranged with the rotating cylinder and meshes with the drive gear.

9. The variable field electron beam applicator according to claim 1, characterized in that, The other end of the light-limiting cylinder is provided with a marker, and at least three markers are provided, which are spaced apart from each other and not collinear.

10. A radiotherapy device, characterized in that, The electron beam applicator with variable field as described in any one of claims 1-9.

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