Novel simple triaxial beam scanning device

Abstract

The utility model discloses a novel simple three-axis beam scanning device, which belongs to the technical field of medical instruments and comprises a base, a three-axis adjusting mechanism, a water tank, a plurality of sliders and an ionization chamber, the three-axis adjusting mechanism comprises an X-axis adjusting module, a Y-axis adjusting module and a Z-axis adjusting module, the X-axis adjusting module is mounted above the base, and the Y-axis adjusting module is mounted above the Z-axis adjusting module. The two ends of the Y-axis adjusting module are fixedly connected to the middle area of the X-axis adjusting module, the water tank is fixedly connected to the center area of the Y-axis adjusting module, the Z-axis adjusting module is fixedly connected with the head of the water tank and installed in the water tank, and the multiple sliding blocks are in threaded connection with the X-axis adjusting module and the Z-axis adjusting module correspondingly. The ionization chamber is fixedly connected to the Z-axis adjusting module, and the X-axis adjusting module and the Y-axis adjusting module are installed on the base, so that adjustment in the horizontal direction is independent of the outside of the water tank, only the Z-axis adjusting module in the vertical direction is kept in the water tank, the structure is simple, the weight is light, and the device is suitable for scanning of radiotherapy equipment with different treatment apertures.

Description

Technical Field

[0001] This utility model belongs to the field of medical instrument technology, and more specifically, relates to a novel simple triaxial beam scanning device. Background Technology

[0002] Radiotherapy equipment includes linear accelerators (LINAC), cobalt-60 radiation sources, protons, heavy ions, etc. Radiotherapy refers to the treatment of tumors using rays generated by radiation sources. The rays can be emitted from outside the body or the radiation source can be placed inside the tumor for internal irradiation. Through the physical, biological, and chemical interactions between the rays and the tumor, the aim is to destroy the tumor or control its growth. The dose distribution scanning device of radiotherapy equipment is a three-dimensional scanning device used for measuring ionizing radiation. It can scan the radiation dose distribution in the X, Y, and Z directions and is widely used in ionization distribution scanning of linear accelerators, cobalt-60 machines, proton and heavy ion generators, etc., to obtain data such as beam flatness, symmetry, and percentage depth dose distribution. Existing three-dimensional dose distribution scanning devices (also known as three-dimensional water tanks) are very large and inconvenient to transport. Newer roller accelerators cannot be effectively measured because the cavity is too small to fit into conventional three-dimensional water tanks. The systems are complex, costly, large, and heavy, and adjustment, placement, and transportation are time-consuming and labor-intensive. Therefore, a simple and easy-to-measure three-axis beam scanning device is needed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a new type of simple triaxial beam scanning device, which can meet the requirements of simple structure and easy measurement.

[0004] This utility model discloses a novel, simplified triaxial beam scanning device, comprising a base, a triaxial adjustment mechanism, a water tank, several sliders, an ionization chamber, a dosimeter, a water tank motion controller, a computer, and several cables. The triaxial adjustment mechanism includes an X-axis adjustment module, a Y-axis adjustment module, and a Z-axis adjustment module. The X-axis adjustment module is mounted on top of the base. The two ends of the Y-axis adjustment module are fixedly connected to the middle area of ​​the X-axis adjustment module. The water tank is fixedly connected to the center area of ​​the Y-axis adjustment module. The Z-axis adjustment module is fixedly connected to the head of the water tank and is installed inside the water tank. Several sliders are threadedly connected to the X-axis and Z-axis adjustment modules respectively. The ionization chamber is fixedly connected to the Z-axis adjustment module. The ionization chamber is connected to the dosimeter... The instrument is electrically connected via cable, and the water tank motion controller is electrically connected to the triaxial adjustment mechanism via cable to control the movement of the triaxial adjustment mechanism in three dimensions. The ionization chamber scans the radiation dose distribution as the triaxial adjustment mechanism moves. Both the dosimeter and the water tank motion controller are electrically connected to a computer via cable. The computer receives the data scanned by the dosimeter and analyzes the data. The X-axis adjustment module and the Y-axis adjustment module are installed on the base, so that the horizontal adjustment module is independent of the outside of the water tank, and only the vertical Z-axis adjustment module is retained inside the water tank. The structure is simple and lightweight, and its weight is within the load-bearing range of the treatment bed of various treatment aperture radiotherapy equipment, which facilitates the scanning of beam data of radiotherapy equipment with different treatment apertures.

[0005] As a further improvement of this utility model, the X-axis adjustment module includes two pairs of X-direction bearings, an X-axis motor, several X-axis synchronous belts, and a pair of X-axis lead screws. The pair of X-axis lead screws are respectively fixedly connected to the upper sides of two opposite edges of the base. The two pairs of X-direction bearings are respectively fitted onto the two ends of the pair of X-axis lead screws. The two X-axis synchronous belts are respectively fitted onto the two pairs of X-direction bearings. One X-axis synchronous belt is fitted onto the output end of the X-axis motor and onto any one of the X-direction bearings, enabling the X-axis motor to drive the X-direction bearing to rotate, and through the X-direction bearing, drive the pair of X-axis synchronous belts. The sliders are provided with threaded holes, and the two sliders are respectively threadedly connected to the pair of X-axis lead screws. The Y-axis adjustment module includes Y-direction bearings, a Y-axis motor, two Y-axis synchronous belts, and a Y-axis lead screw. Both ends of the pair of Y-axis lead screws are fixedly connected to the two sliders. The Y-axis adjustment module moves as the two sliders move on the X-axis lead screws. A pair of Y-axis bearings are respectively fitted onto the two ends of a pair of Y-axis lead screws. A Y-axis synchronous belt is fitted onto the pair of Y-axis bearings, and another Y-axis synchronous belt is fitted onto the output end of the Y-axis motor and onto any one of the Y-axis bearings, enabling the Y-axis motor to drive the rotation of the Y-axis bearing and, through the Y-axis bearing, drive the pair of Y-axis synchronous belts. The Z-axis adjustment module includes a Z-axis bearing, a Z-axis motor, a Z-axis synchronous belt, a Z-axis lead screw, and a guide rail. The Z-axis bearing is fixedly connected to the upper end of the Z-axis lead screw. The output end of the Z-axis motor is connected to the Z-axis bearing via the Z-axis synchronous belt. The housing of the Z-axis motor is fixedly connected to the outer wall of the water tank. The inner wall of the water tank and the guide rail are fixedly connected. The guide rail has through holes at both ends, and the two ends of the Z-axis lead screw are inserted into the through holes of the guide rail. The Z-axis bearing is fixedly connected to the Z-axis lead screw, ensuring high efficiency and reliability during the movement process and reducing errors caused by wear of transmission components.

[0006] As a further improvement of this utility model, the water tank includes a water tank body and a water tank tray. The water tank body is fixedly connected to the upper surface of the water tank tray. The interior of the water tank body is fixedly connected to the Z-axis adjustment module. The water tank tray is provided with a threaded through hole. The Y-axis adjustment module passes through the threaded through hole and is threadedly connected to the water tank tray.

[0007] As a further improvement of this utility model, the base includes a platform and several leveling wheels. The X-axis adjustment module is installed above the platform, and the several leveling wheels are fixedly connected to the four corners of the platform to keep the base balanced on the ground and prevent it from tilting or collapsing.

[0008] As a further improvement of this utility model, the platform and the X-axis adjustment module are detachably connected, so that the size of the platform can be adjusted according to the size of the radiotherapy equipment, so as to realize the horizontal movement of the X-axis adjustment module and the Y-axis adjustment module in different ranges.

[0009] As a further improvement of this utility model, the ionization chamber includes a measuring device and a support, which are fixedly connected. The support has two through holes from top to bottom. One through hole is slidably connected to the guide rail, and the other through hole is fitted onto a slider that is threadedly connected to the Z-axis lead screw. The measuring device moves on the guide rail via the slider to collect the ionization signal generated by the radiotherapy device irradiating the ionization chamber. The connection between the Z-axis lead screw and the guide rail enhances the stability of the Z-axis movement, reduces errors, and ensures the accurate positioning of the ionization chamber in the Z-axis direction.

[0010] Compared to existing technologies, the advantages of this invention are as follows: the X-axis and Y-axis adjustment modules are mounted on the base, allowing horizontal adjustment to be independent of the water tank, while only the vertical Z-axis adjustment module remains inside the water tank. This results in a simple structure, light weight, and suitability for beam data scanning in radiotherapy equipment with different treatment apertures. The synchronous pulley transmission ensures high efficiency and reliability during movement, reducing errors caused by wear of transmission components. Leveling wheels under the base maintain its balance on the ground, preventing tilting or collapse. The base can be designed to different sizes according to the size of the radiotherapy equipment, enabling horizontal movement of the X-axis and Y-axis adjustment modules within different ranges. The Z-axis lead screw connected to the guide rail enhances the stability of Z-axis movement, reduces errors, and ensures precise positioning of the ionization chamber in the Z-axis direction. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the electromechanical structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the mechanical structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the X-axis adjustment module and Y-axis adjustment module of this utility model;

[0015] Figure 5 This is a schematic diagram of the Z-axis adjustment module of this utility model;

[0016] Figure 6 This is a schematic diagram of the base structure of this utility model;

[0017] Figure 7 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 8 This is an enlarged cross-sectional view of the present invention.

[0019] Explanation of the labels in the diagram:

[0020] Base 1; Platform 11; Leveling wheel 12; Three-axis adjustment mechanism 2; X-axis adjustment module 21; X-direction bearing 211; X-axis motor 212; X-axis synchronous belt 213; X-axis lead screw 214; Y-axis adjustment module 22; Y-direction bearing 221; Y-axis motor 222; Y-axis synchronous belt 223; Y-axis lead screw 224; Z-axis adjustment module 23; Z-direction bearing 231; Z-axis motor 232; Z-axis synchronous belt 233; Z-axis lead screw 234; Guide rail 235; Water tank 3; Water tank body 31; Water tank tray 32; Slider 4; Ionization chamber 5; Measuring device 51; Support 52; Dosimeter 6; Water tank motion controller 7; Computer 8; Cable 9. Detailed Implementation

[0021] Specific Implementation Example 1: Please refer to Figures 1-8 This utility model relates to a novel, simplified triaxial beam scanning device, comprising a base 1, a triaxial adjustment mechanism 2, a water tank 3, several sliders 4, an ionization chamber 5, a dosimeter 6, a water tank motion controller 7, a computer 8, and several cables 9. The triaxial adjustment mechanism 2 includes an X-axis adjustment module 21, a Y-axis adjustment module 22, and a Z-axis adjustment module 23. The X-axis adjustment module 21 is mounted above the base 1. The two ends of the Y-axis adjustment module 22 are fixedly connected to the middle area of ​​the X-axis adjustment module 21. The water tank 3 is fixedly connected to the center area of ​​the Y-axis adjustment module 22. The Z-axis adjustment module 23 is fixedly connected to the head of the water tank 3 and is installed inside the water tank 3. Several sliders 4 are threadedly connected to the X-axis adjustment module 21 and the Z-axis adjustment module 23, respectively. The ionization chamber 5 is slidably connected to the Z-axis adjustment module 23. The dosimeter 6 is electrically connected to the water tank motion controller 7 via the cable 9 to control the movement of the three-dimensional adjustment mechanism 2. The ionization chamber 5 scans the radiation dose distribution as the three-axis adjustment mechanism 2 moves. Both the dosimeter 6 and the water tank motion controller 7 are electrically connected to the computer 8 via the cable 9. The computer 9 receives the data scanned by the dosimeter 6 and analyzes the data. The X-axis adjustment module 21 and the Y-axis adjustment module 22 are installed on the base 1, so that the horizontal adjustment is independent of the outside of the water tank 3. Only the vertical Z-axis adjustment module 23 is kept inside the water tank 3. The structure is simple and lightweight, and it is suitable for beam data scanning of radiotherapy equipment with different treatment apertures.

[0022] In a further embodiment, such as Figure 4As shown, the X-axis adjustment module 21 includes two pairs of X-direction bearings 211, an X-axis motor 212, several X-axis synchronous belts 213, and a pair of X-axis lead screws 214. The pair of X-axis lead screws 214 are fixedly connected to the upper sides of two opposite edges of the base 1. The two pairs of X-direction bearings 211 are respectively fitted onto the two ends of the pair of X-axis lead screws 214. The two X-axis synchronous belts 213 are respectively fitted onto the two pairs of X-direction bearings 211. Another independent X-axis synchronous belt 213 is fitted onto the output end of the X-axis motor 212 and onto any one of the X-direction bearings 211, so that the X-axis motor... 212 can drive the X-axis bearing 211 to rotate, and through the X-axis bearing 211 drive a pair of X-axis synchronous belts 213. The slider 4 has threaded holes, and the two sliders 4 are respectively threadedly connected to a pair of X-axis lead screws 214. The Y-axis adjustment module 22 includes a Y-axis bearing 221, a Y-axis motor 222, two Y-axis synchronous belts 223, and a Y-axis lead screw 224. Both ends of the pair of Y-axis lead screws 224 are fixedly connected to the two sliders 4. The Y-axis adjustment module 22 moves as the two sliders 4 move on the X-axis lead screws 214. Y-axis bearings 221 are respectively fitted onto both ends of a pair of Y-axis lead screws 224. A Y-axis synchronous belt 223 is respectively fitted onto a pair of Y-axis bearings 221. Another independent Y-axis synchronous belt 223 is fitted onto the output end of the Y-axis motor 222 and onto any one of the Y-axis bearings 221, enabling the Y-axis motor 222 to drive the rotation of the Y-axis bearing 221, and through the Y-axis bearing 221, drive the pair of Y-axis synchronous belts 223. The Z-axis adjustment module 23 includes a Z-axis bearing 231, a Z-axis motor 232, a Z-axis synchronous belt 233, and a Z-axis synchronous belt 234. The Z-axis screw 234 and guide rail 235 are fixedly connected. The Z-axis bearing 231 is fixedly connected to the upper end of the Z-axis screw 234. The output end of the Z-axis motor 232 is connected to the Z-axis bearing 231 through the Z-axis synchronous belt 233. The housing of the Z-axis motor 232 is fixedly connected to the outer wall of the water tank 3. The inner wall of the water tank 3 is fixedly connected to the guide rail 235. The guide rail 235 has through holes at both ends. The two ends of the Z-axis screw 234 are inserted into the through holes of the guide rail 235. The Z-axis bearing 231 is fixedly connected to the Z-axis screw 234. A slider 4 is threadedly connected to the Z-axis screw 234.

[0023] In a further embodiment, such as Figure 3 As shown, the water tank 3 includes a water tank body 31 and a water tank tray 32. The water tank body 31 is fixedly connected to the upper surface of the water tank tray 32. The interior of the water tank body 31 is fixedly connected to the Z-axis adjustment module 23. The water tank tray 32 is provided with a threaded through hole. The Y-axis adjustment module 22 passes through the threaded through hole and is threadedly connected to the water tank tray 32.

[0024] In a further embodiment, such as Figure 6 As shown, the base 1 includes a platform 11 and several leveling wheels 12. The X-axis adjustment module 21 is installed above the platform 11, and the several leveling wheels 12 are fixedly connected to the four corners of the platform 11 to keep the base 1 balanced on the ground and prevent it from tilting or collapsing.

[0025] In a further embodiment, such as Figures 7-8 As shown, the ionization chamber 5 includes a measuring device 51 and a support 52. The measuring device 51 and the support 52 are fixedly connected. The support 52 has two through holes from top to bottom. One through hole is slidably connected to the guide rail 235, and the other through hole is fitted onto the slider 4 which is threadedly connected to the Z-axis lead screw 234. The measuring device 51 moves on the guide rail 235 through the slider 4 to collect the ionization signal generated by the radiotherapy device irradiating the ionization chamber.

[0026] The radiotherapy device includes a linear accelerator and a treatment bed. In use, the triaxial beam scanning device of this invention is placed on the treatment bed, and the ionization chamber 5 is oriented towards the emitting end of the linear accelerator. The water tank motion controller 7 controls the triaxial adjustment mechanism 2 to achieve three-dimensional motion. The X-axis adjustment module 21 and the Y-axis adjustment module 22 drive the water tank 3 to move horizontally, which indirectly drives the ionization chamber 5 to move horizontally. The Z-axis adjustment module 23 drives the ionization chamber 5 to move longitudinally. The ionization chamber 5 moves in three dimensions on the treatment bed and collects the ionization signal generated by the linear accelerator irradiating the ionization chamber 5. Then, the ionization signal is transmitted to the dosimeter 6 for amplification and processing. The computer 8 receives the data scanned by the dosimeter 6 and analyzes the data.

Claims

1. A novel, simplified triaxial beam scanning device, characterized in that: The system includes a base (1), a three-axis adjustment mechanism (2), a water tank (3), several sliders (4), and an ionization chamber (5). The three-axis adjustment mechanism (2) includes an X-axis adjustment module (21), a Y-axis adjustment module (22), and a Z-axis adjustment module (23). The X-axis adjustment module (21) is installed above the base (1). The two ends of the Y-axis adjustment module (22) are fixedly connected to the middle area of ​​the X-axis adjustment module (21). The water tank (3) is fixedly connected to the center area of ​​the Y-axis adjustment module (22). The Z-axis adjustment module (23) is fixedly connected to the head of the water tank (3). The Z-axis adjustment module (23) is installed inside the water tank (3). Several sliders (4) are threadedly connected to the X-axis adjustment module (21) and the Z-axis adjustment module (23) respectively. The ionization chamber (5) is fixedly connected to the Z-axis adjustment module (23), so that the horizontal adjustment module is independent of the outside of the water tank (3), and only the vertical Z-axis adjustment module (23) is kept inside the water tank (3).

2. The novel simplified triaxial beam scanning device according to claim 1, characterized in that: It also includes a dosimeter (6), a water tank motion controller (7), a computer (8), and several cables (9). The ionization chamber (5) is electrically connected to the dosimeter (6) via cables (9). The water tank motion controller (7) is electrically connected to the triaxial adjustment mechanism (2) via cables (9) to control the movement of the triaxial adjustment mechanism (2) in three dimensions. The ionization chamber (5) scans the radiation dose distribution as the triaxial adjustment mechanism (2) moves. Both the dosimeter (6) and the water tank motion controller (7) are electrically connected to the computer (8) via cables (9).

3. The novel simplified triaxial beam scanning device according to claim 1, characterized in that: The X-axis adjustment module (21) includes two pairs of X-direction bearings (211), an X-axis motor (212), several X-axis synchronous belts (213), and a pair of X-axis lead screws (214). The pair of X-axis lead screws (214) are fixedly connected to the two opposite edges of the base (1). The two pairs of X-direction bearings (211) are respectively sleeved on the two ends of the pair of X-axis lead screws (214). The two X-axis synchronous belts (213) are respectively sleeved on the two pairs of X-direction bearings (211). One X-axis synchronous belt (213) is sleeved on the output end of the X-axis motor (212) and any X-direction bearing (211), so that the X-axis motor (212) can drive the X-direction bearing (211) to rotate and drive the pair of X-axis synchronous belts (213) to move through the X-direction bearing (211). The slider (4) is provided with threaded holes, and the two sliders (4) are respectively threadedly connected to the pair of X-axis lead screws (214).

4. The novel simplified triaxial beam scanning device according to claim 1, characterized in that: The Y-axis adjustment module (22) includes a pair of Y-direction bearings (221), a Y-axis motor (222), two Y-axis synchronous belts (223), and a Y-axis lead screw (224). Both ends of the pair of Y-axis lead screws (224) are fixedly connected to two sliders (4). The Y-axis adjustment module (22) moves with the movement of the two sliders (4) on the Y-axis lead screws (224). The pair of Y-direction bearings (221) are respectively fitted on both ends of the pair of Y-axis lead screws (224). One Y-axis synchronous belt (223) is respectively fitted on the pair of Y-direction bearings (221). Another Y-axis synchronous belt (223) is fitted on the output end of the Y-axis motor (222) and any Y-direction bearing (221), so that the Y-axis motor (222) can drive the Y-direction bearing (221) to rotate and drive the pair of Y-axis synchronous belts (223) through the Y-direction bearing (221).

5. A novel simplified triaxial beam scanning device according to claim 1, characterized in that: The Z-axis adjustment module (23) includes a Z-axis bearing (231), a Z-axis motor (232), a Z-axis synchronous belt (233), a Z-axis lead screw (234), and a guide rail (235). The Z-axis bearing (231) is fixedly connected to the upper end of the Z-axis lead screw (234). The output end of the Z-axis motor (232) is connected to the Z-axis bearing (231) through the Z-axis synchronous belt (233). The housing of the Z-axis motor (232) is fixedly connected to the outer wall of the water tank (3). The inner wall of the water tank (3) is fixedly connected to the guide rail (235). The guide rail (235) has through holes at both ends. The two ends of the Z-axis lead screw (234) are inserted into the through holes of the guide rail (235). The Z-axis bearing (231) is fixedly connected to the Z-axis lead screw (234).

6. The novel simplified triaxial beam scanning device according to claim 1, characterized in that: The water tank (3) includes a water tank body (31) and a water tank tray (32). The water tank body (31) is fixedly connected to the upper surface of the water tank tray (32) at the bottom. The interior of the water tank body (31) is fixedly connected to the Z-axis adjustment module (23). The water tank tray (32) is provided with a threaded through hole. The Y-axis adjustment module (22) passes through the threaded through hole and is threadedly connected to the water tank tray (32).

7. A novel simplified triaxial beam scanning device according to claim 1, characterized in that: The base (1) includes a platform (11) and several leveling wheels (12). The X-axis adjustment module (21) is installed above the platform (11), and several leveling wheels (12) are fixedly connected to the four corners of the platform (11).

8. A novel simplified triaxial beam scanning device according to claim 5, characterized in that: The ionization chamber (5) includes a measuring device (51) and a support (52). The measuring device (51) and the support (52) are fixedly connected. The support (52) has two through holes from top to bottom. One through hole is slidably connected to the guide rail (235), and the other through hole is fitted onto the slider (4) which is threadedly connected to the Z-axis lead screw (234). The measuring device (51) moves on the guide rail (235) through the slider (4).

9. A novel simplified triaxial beam scanning device according to claim 7, characterized in that: The platform (11) is detachably connected to the X-axis adjustment module (21), so that the size of the platform (11) can be adjusted according to the size of the radiotherapy equipment, so as to realize the horizontal movement of the X-axis adjustment module (21) and the Y-axis adjustment module (22) in different ranges.

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