A remote automatic filter switching device for proton system CBCT imaging

Abstract

The present invention discloses a remote automatic switching device for filters used in proton system CBCT imaging, including a filter assembly and a beam spotter, a mounting plate is horizontally arranged at the bottom of the filter assembly, and an X-ray tube is arranged below the mounting plate, a filter bracket is arranged at the bottom of the filter assembly, and a motor is arranged at one end above the filter assembly, a motor bracket is arranged below one end of the motor, and an adjustment block is arranged on one side of the motor bracket, and a synchronous belt is sleeved on the pulley at one end of the motor. The beneficial effects of the present invention are: the present invention can realize remote selection of filters and precise control, avoiding the patient's time wasting due to the operator manually replacing the filter during diagnosis and positioning, thereby reducing the treatment efficiency, the present invention can quickly and efficiently replace the filter, and greatly shorten the diagnosis and treatment time, thereby reducing the patient's expenses; the present invention has good social benefits and is suitable for popularization and use.

Description

Technical Field

[0001] The invention relates to an automatic switching device, in particular to a remote automatic switching device for filters used in proton system CBCT imaging, belonging to the technical field of automatic switching device application. Background Art

[0002] In radiotherapy, imaging equipment is needed to determine the patient's tumor information and accurately position the patient. CBCT is a common type of imaging equipment. A filter is usually installed in front of the CBCT tube. The main function of the filter is to absorb low-energy X-rays that are useless for CBCT imaging and adjust the energy distribution of X-rays passing through the human body, thereby reducing radiation damage to the human body and improving image quality. Depending on the patient's body shape and scanning imaging method, the filter needs to be replaced between parts with multiple different curves.

[0003] In proton therapy, CBCT is usually installed on a rotating gantry, and its flat-panel detector and X-ray tube are installed on the inner wall of the gantry and rotate with the gantry. Because the inner diameter of the rotating gantry used in proton radiotherapy is usually large and there is a shell covering on the outside, if the operator wants to replace the filter, he needs to enter the treatment room to manually remove the covering and then replace the filter. The process is time-consuming and labor-intensive, and the patient needs to wait for a long time, which affects the treatment efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the rotating gantry used for proton radiotherapy usually has a large inner diameter and a shell covering the outside. If the operator wants to replace the filter, he needs to enter the treatment room to manually remove the covering and then replace the filter. The process is time-consuming and labor-intensive, and the patient needs to wait for a long time, which affects the treatment efficiency. A remote automatic filter switching device for proton system CBCT imaging is proposed.

[0005] The object of the present invention can be achieved by the following technical scheme: A remote automatic switching device for filters used for proton system CBCT imaging, comprising a filter assembly and a beam spotter, a mounting plate being horizontally arranged at the bottom of the filter assembly, and an X-ray tube being arranged below the mounting plate;

[0006] A filter bracket is provided at the bottom of the filter assembly, and a motor is provided at one end above the filter assembly, a motor bracket is provided below one end of the motor, and an adjustment block is provided on one side of the motor bracket, a synchronous belt is sleeved on the pulley at one end of the motor, and one end of the synchronous belt is sleeved on the pulley at one end of the screw module, a support unit is provided at the other end of the screw module, and a connecting bracket is sleeved in the middle of the screw module, a nut sleeve is sleeved on the connecting bracket, two guide rail sliders are parallelly provided on one side of the end of the screw module, and a nut sleeve is sleeved on the two guide rail sliders There is a filter mounting plate, and the bottoms of both ends of the filter mounting plate are respectively seated on two guide rail sliders, filter one is fixedly mounted on one end of the upper surface of the filter mounting plate, and filter two is fixedly mounted on the other end of the upper surface of the filter mounting plate, and a detection plate is fixedly mounted on one side above the filter mounting plate, and a photoelectric switch assembly is provided on one side of one of the guide rail sliders. When the detection plate contacts the photoelectric switch in the photoelectric switch assembly, a photoelectric signal is triggered and fed back to the control system, at which time the motor stops working, and the control system records the position and uses it as a filter-free state. Similarly, when filter one and filter two are driven by the motor to move to the front of the beam spotter, the control system records the position at this time, and selects it on the user operation interface to achieve rapid switching of the filter.

[0007] Among them, a rectangular bracket bottom plate is arranged at the bottom of the filter bracket, and two angle aluminums are arranged vertically at both ends of the bracket bottom plate, and connecting plates are arranged horizontally in the middle between the two angle aluminums at both ends of the bracket bottom plate, wherein the connecting plates are used as reinforcing ribs to connect the angle aluminums to ensure that the filter bracket as a whole is more stable and reliable, and a bracket top plate is arranged vertically on the top of the angle aluminum, a mounting block is arranged above the bracket top plate, and a limit block is arranged on one side of the mounting block, wherein one of the mounting blocks and the limit block is used as an extreme position stopper to prevent the guide rail slider from detaching from the guide rail.

[0008] A further technical improvement of the present invention is that the support top plate of the filter support is fixed on the angle aluminum, the angle aluminum is fixed on the support bottom plate, and the mounting block and the limit block are both fixed on the support top plate.

[0009] A further technical improvement of the present invention is that the filter one and the filter two are both fixed to the filter mounting plate, the filter mounting plate is fixed to the guide rail slider, and the filter mounting plate and the guide rail slider are both fixed to the filter bracket.

[0010] A further technical improvement scheme of the present invention is that: the motor bracket and the adjustment block are both fixed to the filter bracket, and the adjustment bolt is installed on the adjustment block, the support unit is fixed to the mounting block on the filter bracket, and the screw module is fixedly connected to the support unit through the mounting block, the synchronous belt and the pulley are respectively fixed to the motor and the screw module, and the synchronous belt is tightened under the action of the adjustment bolt to prevent tooth jumping.

[0011] A further technical improvement scheme of the present invention is that: the detection plate is fixedly mounted on the filter mounting plate, and the photoelectric switch assembly is fixedly mounted on the filter bracket. Under the action of the motor, the filter mounting plate is driven to slide along the guide rail through the synchronous belt and pulley, the screw module, the nut sleeve and the connecting bracket, and different types of filters are put into working state, thereby absorbing low-energy X-rays and evenly distributing energy.

[0012] A further technical improvement of the present invention is that the motor is movably connected to the filter mounting plate through a pulley, a synchronous belt, a screw module, a connecting bracket and a nut sleeve, and the filter mounting plate is slidably connected to the guide rail slider.

[0013] A further technical improvement of the present invention is that the mounting plate is arranged below the bracket bottom plate, the mounting plate and the bracket bottom plate have matching areas, and the mounting plate and the bracket bottom plate are fixedly connected at four corners by mounting bolts.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can realize remote selection of filters and precise control, thereby avoiding delays in patients' diagnosis and positioning due to manual filter replacement by operators, thereby reducing treatment efficiency. The present invention can replace filters quickly and efficiently, and greatly shortens diagnosis and treatment time, thereby reducing patient costs; the present invention has good social benefits and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0016] Figure 1 Schematic diagram of CBCT installed on a rotating gantry.

[0017] Figure 2 This is a schematic diagram of the installation of the filter assembly of the present invention.

[0018] Figure 3 It is a schematic diagram of the filter assembly structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the filtering support structure of the present invention.

[0020] In the figure: 1. filter assembly; 2. beam collector; 3. mounting bolt; 4. mounting plate; 5. X-ray tube; 201. motor; 202. motor bracket; 203. adjustment block; 204. timing belt; 205. guide rail slider; 206. filter one; 207. filter bracket; 208. photoelectric switch assembly; 209. detection plate; 210. filter mounting plate; 211. filter two; 212. support unit; 213. lead screw module; 214. connecting bracket; 215. nut sleeve; 216. adjustment bolt; 301. bracket bottom plate; 302. angle aluminum; 303. connecting plate; 304. bracket top plate; 305. mounting block; 306. limit block. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-4 As shown, a filter remote automatic switching device for proton system CBCT imaging includes a filter assembly 1 and a beam splitter 2. A mounting plate 4 is horizontally arranged at the bottom of the filter assembly 1, and an X-ray tube 5 is arranged below the mounting plate 4. In the device, the filter assembly 1 is fixed to the mounting plate 4 at the upper end of the X-ray tube by mounting bolts 3, and the beam splitter 2 is installed on the X-ray tube 5. The filter assembly 1 is located directly above the beam splitter 2, and the effective use range of the filter 2 can completely cover the X-ray at the exit of the beam splitter 2. During treatment, the use status of the filter is mainly divided into three situations, namely filter one, filter two and no filter.

[0023] A filter bracket 207 is provided at the bottom of the filter assembly 1, and a motor 201 is provided at one end above the filter assembly 1, a motor bracket 202 is provided below one end of the motor 201, and an adjustment block 203 is provided on one side of the motor bracket 202, a synchronous belt 204 is sleeved on the pulley at one end of the motor 201, and one end of the synchronous belt 204 is sleeved on the pulley at one end of the screw module 213, a support unit 212 is provided at the other end of the screw module 213, and a connecting bracket 214 is sleeved on the middle part of the screw module 213, a nut sleeve 215 is sleeved on the connecting bracket 214, and two guide rail sliders 205 are parallelly provided on one side of the end of the screw module 213, and the two guide rail sliders 205 have a plurality of guide rails 205. A filter mounting plate 210 is horizontally arranged, and the bottoms of both ends of the filter mounting plate 210 are respectively seated on two guide rail sliders 205. Filter 1 206 is fixedly installed on one end of the upper end surface of the filter mounting plate 210, and filter 2 211 is fixedly installed on the other end of the upper end surface of the filter mounting plate 210. A detection plate 209 is fixedly installed on one side of the upper side of the filter mounting plate 210. A photoelectric switch assembly 208 is provided on one side of one of the guide rail sliders 205. When the detection plate 209 contacts the photoelectric switch in the photoelectric switch assembly 208, a photoelectric signal is triggered and fed back to the control system. At this time, the motor stops working, and the control system records the current position, which corresponds to the state of no filter. Similarly, when filter 1 and filter 2 are respectively moved to the front of the beam spotter under the drive of the motor, the control system records the position at this time and selects it on the user operation interface to realize the rapid switching of the filter.

[0024] Among them, a rectangular bracket bottom plate 301 is arranged at the bottom of the filter bracket 207, and two angle aluminums 302 are arranged vertically at both ends of the bracket bottom plate 301, and a connecting plate 303 is arranged horizontally in the middle between the two angle aluminums 302 at both ends of the bracket bottom plate 301, wherein the connecting plate 303 is used as a reinforcing rib to connect the angle aluminums 302 to ensure that the filter bracket 207 as a whole is more stable and reliable, and a bracket top plate 304 is arranged vertically on the top of the angle aluminum 302, a mounting block 305 is arranged above the bracket top plate 304, and a limit block 306 is arranged on one side of the mounting block 305, wherein one of the mounting blocks 305 and the limit block 306 are used as extreme position blocks to prevent the guide rail slider 205 from detaching from the guide rail.

[0025] As a technical optimization solution of the present invention, the support top plate 304 of the filter support 207 is fixed to the angle aluminum 302, the angle aluminum 302 is fixed to the support bottom plate 301, and the mounting block 305 and the limit block 306 are both fixed to the support top plate 304.

[0026] As a technical optimization solution of the present invention, filter 1 206 and filter 2 211 are both fixed to the filter mounting plate 210, the filter mounting plate 210 is fixed to the guide rail slider 205, and the filter mounting plate 210 and the guide rail slider 205 are both fixed to the filter bracket 207.

[0027] As a technical optimization solution of the present invention, the motor bracket 202 and the adjustment block 203 are both fixed to the filter bracket 207, and the adjustment bolt 216 is installed on the adjustment block 203, the support unit 212 is fixed to the mounting block 305 on the filter bracket 207, and the screw module 213 is fixedly connected to the support unit 212 through the mounting block 305, the synchronous belt and the pulley 204 are respectively fixed to the motor 201 and the screw module 213, and the synchronous belt 204 is tightened under the action of the adjustment bolt 216 to prevent tooth jumping.

[0028] As a technical optimization solution of the present invention, the detection plate 209 is fixed on the filter mounting plate 210, and the photoelectric switch assembly 208 is fixed on the filter bracket 207. Under the action of the motor 201, the filter mounting plate 210 is driven to slide along the guide rail through the synchronous belt and pulley 204, the screw module 213, the nut sleeve 215 and the connecting bracket 214, and different types of filters are placed in working state, which plays a role in absorbing low-energy X-rays and evenly distributing energy.

[0029] As a technical optimization solution of the present invention, the motor 201 is movably connected to the filter mounting plate 210 through a pulley, a synchronous belt 204, a screw module 213, a connecting bracket 214 and a nut sleeve 215, and the filter mounting plate 210 is slidably connected to the guide rail slider 205.

[0030] As a technical optimization solution of the present invention, the mounting plate 4 is arranged below the bracket base plate 301 , and the mounting plate 4 matches the bracket base plate 301 in area, and the mounting plate 4 and the bracket base plate 301 are fixedly connected at four corners by mounting bolts 3 .

[0031] Working principle: When the present invention is used, the device is first powered on, and then the motor 201 is started to move the filter mounting plate 210 along the guide rail. When the detection plate 209 triggers the photoelectric switch assembly 208, the trigger signal is fed back to the control system, and the control system records the current position, corresponding to the state of no filter. Similarly, when the filter 1 206 and the filter 2 211 are respectively moved to the front of the beam 2 under the drive of the motor 201, the control system records the position at this time.

[0032] The positions of the two filters and the one without a filter can be recorded and selected on the user operation interface to achieve fast switching of filters.

[0033] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A remote automatic filter switching device for proton system CBCT imaging, characterized in that: It comprises a filter assembly (1) and a beam collector (2), wherein a mounting plate (4) is horizontally arranged at the bottom of the filter assembly (1), and an X-ray tube (5) is arranged below the mounting plate (4); A filter bracket (207) is provided at the bottom of the filter assembly (1), and a motor (201) is provided at one end above the filter assembly (1), a motor bracket (202) is provided below one end of the motor (201), and an adjustment block (203) is provided on one side of the motor bracket (202), a synchronous belt (204) is sleeved on a pulley at one end of the motor (201), and one end of the synchronous belt (204) is sleeved on a pulley at one end of a screw module (213), a support unit (212) is provided at the other end of the screw module (213), and a connecting bracket (214) is sleeved on the middle part of the screw module (213), and a nut sleeve (203) is sleeved on the connecting bracket (214). 215), two guide rail sliders (205) are arranged in parallel on one side of the end of the lead screw module (213), and a filter mounting plate (210) is arranged horizontally above the two guide rail sliders (205), and the bottoms of both ends of the filter mounting plate (210) are respectively seated on the two guide rail sliders (205), a filter one (206) is fixedly mounted on one end of the upper end surface of the filter mounting plate (210), and a filter two (211) is fixedly mounted on the other end of the upper end surface of the filter mounting plate (210), a detection plate (209) is fixedly mounted on one side of the upper end surface of the filter mounting plate (210), and a photoelectric switch component (208) is provided on one side of one of the guide rail sliders (205); The bottom of the filter support (207) is provided with a rectangular support bottom plate (301), and two angle aluminums (302) are vertically arranged at both ends of the support bottom plate (301), a connecting plate (303) is horizontally arranged in the middle between the two angle aluminums (302) at both ends of the support bottom plate (301), and a support top plate (304) is vertically arranged on the top of the angle aluminum (302), a mounting block (305) is arranged above the support top plate (304), and a limit block (306) is arranged on one side of the mounting block (305); The filter 1 (206) and the filter 2 (211) are both fixedly mounted on the filter mounting plate (210), the filter mounting plate (210) is fixedly mounted on the guide rail slider (205), and the filter mounting plate (210) and the guide rail slider (205) are both fixedly mounted on the filter bracket (207); The motor support (202) and the adjustment block (203) are both fixedly mounted on the filter support (207), and the adjustment bolt (216) is installed on the adjustment block (203); the support unit (212) is fixedly mounted on the mounting block (305) on the filter support (207), and the lead screw module (213) is fixedly connected to the support unit (212) via the mounting block (305); and the synchronous belt and the pulley (204) are respectively fixedly mounted on the motor (201) and the lead screw module (213); The detection plate (209) is fixedly mounted on the filter mounting plate (210), and the photoelectric switch assembly (208) is fixedly mounted on the filter support (207); The motor (201) is movably connected to the filter mounting plate (210) via a pulley, a synchronous belt (204), a lead screw module (213), a connecting bracket (214) and a nut sleeve (215), and the filter mounting plate (210) is slidably connected to the guide rail slider (205); When in use, first power on the device, then start the motor (201) to move the filter mounting plate (210) along the guide rail. When the detection plate (209) triggers the photoelectric switch assembly (208), the trigger signal is fed back to the control system, and the control system records the current position, which corresponds to the state of no filter. Similarly, when filter 1 (206) and filter 2 (211) are driven by the motor (201) to move to the front of the beam spotter (2), the control system records the positions at this time.

2. The filter remote automatic switching device for proton system CBCT imaging according to claim 1, characterized in that: The support top plate (304) of the filtering support (207) is fixed on the angle aluminum (302), the angle aluminum (302) is fixed on the support bottom plate (301), and the mounting block (305) and the limiting block (306) are both fixed on the support top plate (304).

3. The filter remote automatic switching device for proton system CBCT imaging according to claim 1, characterized in that: The mounting plate (4) is arranged below the bracket bottom plate (301), and the mounting plate (4) and the bracket bottom plate (301) are matched in size, and the mounting plate (4) and the bracket bottom plate (301) are fixedly connected at four corners by mounting bolts (3).

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