CN218824710U - Quality control detection device of low-energy X-ray brachytherapy machine - Google Patents
Quality control detection device of low-energy X-ray brachytherapy machine Download PDFInfo
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- CN218824710U CN218824710U CN202223033536.2U CN202223033536U CN218824710U CN 218824710 U CN218824710 U CN 218824710U CN 202223033536 U CN202223033536 U CN 202223033536U CN 218824710 U CN218824710 U CN 218824710U
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- 238000002725 brachytherapy Methods 0.000 title claims abstract description 22
- 238000003908 quality control method Methods 0.000 title claims abstract description 19
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model discloses a quality control detection device of a low-energy X-ray brachytherapy machine, which comprises a radiation generator bracket and a water tank; the ray generator support comprises a three-dimensional displacement table and a horizontal supporting plate, one end of the horizontal supporting plate is installed on the three-dimensional displacement table, the other end of the horizontal supporting plate is provided with a rotating table, and a water tank is arranged below the rotating table; the adapter is arranged on the side wall of the water tank, the main body part of the adapter is positioned in the water tank, and the adapter is provided with a mounting hole for inserting the detector; a through hole is formed on the top plate of the water tank; the rotating table is provided with a ray generator, and a radioactive source of the ray generator penetrates through the rotating table and the through hole in the top plate to enter the water tank. The utility model discloses can freely adjust the position of radiation source from X, Y, Z axle three direction to the corresponding displacement volume of accurate measurement, and then the dose distribution of measurement ray, operating method is simple, and the precision is high.
Description
Technical Field
The utility model relates to a radiotherapy quality control detects technical field, relates to a low energy X ray brachytherapy machine quality control detection device.
Background
In recent years, a novel low-energy X-ray brachytherapy machine (Intrabeam type and Xoft Axxent type brachytherapy systems) applied to clinical tumor radiotherapy can be matched with applicators with different sizes and different shapes, can be in close contact with human tumors or abnormal tissues and can irradiate the human tumors or abnormal tissues with large dose, so that tumor cells are killed to the maximum extent, and normal tissues are protected. The treatment technology has the advantages of high treatment speed, good patient compliance and the like.
The radiation dose of the low-energy X-ray brachytherapy machine decreases with the increase of the tissue depth, and the quality control detection should be carried out on the brachytherapy machine in order to ensure the clinical treatment effect. But at present, no standard or regulation for quality control detection exists in China. In addition, in view of the small volume of the low-energy X-ray brachytherapy machine radioactive source and the brachytherapy, the local dose is very high, and the information such as whether the ray isotropy around the radioactive source is consistent, whether the dose curve has deviation or not, whether the geometric shape of the radiation output distribution is changed consistently or not, and the like, is very important, and the radiotherapy effect is directly influenced.
Therefore, a quality control detection device is designed to detect the dosimetry indexes (such as ray quality, deep absorbed dose curve, output dose accuracy and the like) of the novel low-energy X-ray brachytherapy machine so as to ensure that the therapy machine has important significance for effective implementation of clinical radiotherapy.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a fill the blank in low energy X ray brachytherapy machine quality control detection area, provide a low energy X ray brachytherapy machine quality control detection device.
The utility model is realized by adopting the following technical proposal.
A quality control detection device for a low-energy X-ray brachytherapy machine comprises a ray generator bracket and a water tank; the ray generator support comprises a three-dimensional displacement table and a horizontal supporting plate, one end of the horizontal supporting plate is installed on the three-dimensional displacement table, the other end of the horizontal supporting plate is provided with a rotating table, and a water tank is arranged below the rotating table; the adapter is arranged on the side wall of the water tank, the main body part of the adapter is positioned in the water tank, and the adapter is provided with a mounting hole for inserting the detector; a through hole is formed on the top plate of the water tank; the rotating table is provided with a ray generator, and a radioactive source of the ray generator penetrates through the rotating table and the through hole in the top plate to enter the water tank.
Furthermore, the three-dimensional displacement table and the water tank are both arranged on the metal plate.
Further, the three-dimensional displacement table comprises a lifting table and two translation tables which are stacked; the three-dimensional displacement platform drives the horizontal supporting plate to move in a reciprocating mode in the vertical direction and/or move in a reciprocating mode in the horizontal direction along two mutually perpendicular directions.
Furthermore, the ray generator is installed on the rotating platform through the adapter, and the adapter is provided with a locking mechanism.
Furthermore, the three-dimensional displacement platform and the rotating platform are respectively provided with a scale ruler for indicating the linear displacement and the angle displacement.
Further, the water tank comprises a U-shaped tank plate, and mounting grooves for mounting the side baffles are formed in the edges of two sides of the U-shaped tank plate; two adapter mounting holes for mounting the adapters and a water supply and drainage hole for mounting a water pipe are formed on the side wall of the U-shaped box plate.
Furthermore, the adapter main body is of a tubular structure, one end of the adapter is closed, and the outer diameter of the other end of the adapter is increased to form an annular extension part; the blind end is followed the adapter mounting hole and is worn into in the water tank from the water tank outside, is equipped with waterproof gasket between extension portion and the U type case board.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model can freely adjust the position of the radioactive source from three directions of X, Y, Z axis, and accurately measure the corresponding displacement, thereby measuring the dose distribution of the ray; the utility model has simple operation method, the stroke of each adjusting direction is 50mm at least, the adjusting precision is high, and most measuring requirements are fully satisfied; the utility model is convenient to match different adapters and radioactive sources; the water tank shell has good shielding property, effectively reduces the surrounding background radiation dose and is easy to clean and disinfect.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a three-dimensional displacement table according to the present invention;
fig. 3 is a schematic structural view of the lifting platform of the present invention;
fig. 4 is a schematic structural view of the translation stage of the present invention;
fig. 5 is a schematic structural view of the rotary table of the present invention;
FIG. 6 is a schematic structural view of a transfer member according to the present invention;
FIG. 7 is a schematic structural view of the water tank of the present invention;
FIG. 8 is a longitudinal sectional view of the water tank of the present invention;
FIG. 9 is a schematic structural view of a U-shaped box board according to the present invention;
fig. 10 is a schematic structural diagram of the adapter of the present invention.
Wherein, 1, horizontal supporting plate; 2. a three-dimensional displacement table; 201.Z axis adjusting knob; 202. X-axis adjusting knob; 203. Y-axis adjusting knob; 204. a lifting platform; 205. a translation stage; 3. a rotating table; 301. a turntable; 302. a fixed table; 303. a first locking knob; 304. an angle adjusting knob; 4. an adapter; 401. a stationary ring; 402. a sleeve; 403. screw holes; 404. locking knob mounting holes; 405. a second locking knob; 5. a water tank; 501, U-shaped boxboards; 502. mounting grooves; 503. an adapter mounting hole; 504. a water pipe; 505. a side dam; 506. a top plate; 6. a ray generator; 7. an adapter; 8. a waterproof gasket; 9. a metal plate.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in figures 1-10, the quality control and detection device for the low-energy X-ray brachytherapy machine comprises a radiation generator bracket and a water tank 5. The ray generator support comprises a three-dimensional displacement table 2 and a horizontal supporting plate 1 arranged on the three-dimensional displacement table 2, a rotating table 3 is arranged on the horizontal supporting plate 1, and a water tank 5 is arranged below the rotating table 3. An adapter 7 is installed on the side wall of the water tank 5, a mounting hole for inserting a detector is formed in the adapter 7, and the main body of the adapter 7 is located inside the water tank 5; a through hole is formed on the top plate 506 of the water tank 5; the rotating platform 3 is provided with a ray generator 6, and a radioactive source emitting rays in the ray generator 6 is positioned below the rotating platform 3 and penetrates through a through hole in the top plate 506 to enter the water tank 5.
One end of the horizontal supporting plate 1 is fixed on the three-dimensional displacement table 2 through screws, the horizontal supporting plate 1 is made of hard aluminum, the thickness of the horizontal supporting plate is not less than 5mm (the thickness is as thick as possible on the premise that the weight does not exceed the bearing capacity of the three-dimensional displacement table 2), and otherwise, the horizontal supporting plate has the risk of deformation and bending after long-term use.
The three-dimensional displacement table 2 and the water tank 5 are both arranged on a metal plate 9. The metal plate 9 is provided with a level bubble for determining whether the whole device is placed parallel to the horizontal plane.
The three-dimensional displacement table 2 comprises a lifting table 204 and two translation tables 205 which are combined together; the three-dimensional displacement table 2 drives the horizontal supporting plate 1 to reciprocate in the vertical direction and/or reciprocate in the horizontal direction along two mutually perpendicular directions. In this embodiment, the elevating platform 204 is a precision type PT-SD408S hand-operated elevating platform manufactured by pidey corporation, the translation platform 205 is a precision type PT-SD102P hand-operated translation platform manufactured by pidey corporation, both bodies are made of hard aluminum, the surface is anodized, and the precision type PT-SD102P hand-operated translation platform is driven by a fine grinding screw. The PT-SD408S type lifting platform is shown in figure 3, the size of the platform surface is 120mm multiplied by 80mm, the lifting stroke reaches 60mm, the minimum adjustment amount is 5 mu m, the dead weight is 1.15kg, and the maximum bearing capacity is 20kg; a PT-SD102P type precise manual translation table is shown in figure 4, the size of the table top is 120mm multiplied by 60mm, the lifting stroke reaches 50mm, the minimum adjustment amount is 5 mu m, the self weight is 0.75kg, and the maximum bearing capacity is 12.5kg. The selected lifting platform 204 and the selected translation platform 205 can meet the requirements of the device on bearing capacity and precision. One translation stage 205 is stacked on the top of the lifting stage 204 and locked by screws, and another translation stage 205 is mounted on the top of the translation stage 205, the moving direction of the newly mounted translation stage 205 is perpendicular to that of the translation stage 205 located below, and the two translation stages are also locked by screws, so that the three-dimensional displacement stage 2 can be constructed. As shown in fig. 1, in the three-dimensional displacement table 2, the horizontal supporting plate 1 can be controlled to move up and down in the vertical direction by adjusting the Z-axis adjusting knob 201; adjusting the X-axis adjusting knob 202 or the Y-axis adjusting knob 203 controls the horizontal support plate 1 to move in the horizontal direction. And scales are arranged on the lifting platform 204 and the two translation platforms 205 and are used for indicating displacement.
The end of the horizontal supporting plate 1 far away from the three-dimensional displacement table 2 is provided with a rotating table 3, and the rotating table 3 of the embodiment is a PT-SD205 model 360-degree precision rotating table of Dodwey company. The PT-SD205 model 360-degree precision turntable is shown in FIG. 5, a turntable 301 which can rotate under the drive of an angle adjusting knob 304 is arranged in the middle of the PT-SD model 360-degree precision turntable, a hole is formed in the center of the turntable 301 and used for allowing a radioactive source to pass through, and a plurality of threaded fixing holes are formed around the hole; the turntable 301 is mounted on the fixing table 302, and the fixing table 302 is fixed on the horizontal supporting plate 1 through screw holes (a hole corresponding to the central hole of the turntable 301 is formed in the horizontal supporting plate 1 and used for mounting the ray generator 6). The rotating platform 3 is further provided with a first locking knob 303, which can be used for locking the rotating disk 301 to prevent it from passively rotating. The periphery of the turntable 301 is provided with an angle marking line for reading the angle displacement.
The ray generator 6 is installed on the rotary table 3 through the adapter 4, and the adapter 4 is provided with a locking mechanism. As shown in fig. 6, the adaptor 4 is an integrally formed metal member, a sleeve 402 is disposed in the middle for accommodating the radiation generator 6, a plurality of locking knob mounting holes 404 are formed in the sidewall of the sleeve 402, and a second locking knob 405 is disposed in the locking knob mounting holes 404 and is in threaded engagement with the locking knob mounting holes 404. After the radiation generator 6 is placed in the sleeve 402, the second locking knob 405 is rotated, and the tail end of the second locking knob penetrates into the sleeve 402 and abuts against the outer wall of the radiation generator 6, so that the radiation generator 6 can be locked. An annular fixing ring 401 is formed below the sleeve 402, and a plurality of screw holes 403 matched with the thread fixing holes of the rotary disc 301 in shape and position are formed in the fixing ring 401 and used for installing the fixing ring 401 on the rotary disc 301. In fact, the adapter 4 can have a plurality of models for the ray generators 6 with different external dimensions, and the sleeve 402 can also have other shapes than a cylindrical shape, and fig. 6 is just an example, which is a visual depiction of the general features of the adapter 4 and does not make any specific structural limitation on the adapter 4.
The water tank 5 comprises a U-shaped tank plate 501, and mounting grooves 502 which are uniform in width and used for mounting side baffles 505 are formed on the edges of two sides of the U-shaped tank plate 501; the U-shaped box plate 501 is also formed with two adapter mounting holes 503 for mounting the adapters 7 and a water supply and drainage hole for mounting the water pipe 504 on the side wall. The water tank 5 is generally 40cm wide, 60cm long and 52cm high. U type boxboard 501 is the metal material, and the main part is duralumin material, and the surface covers 2mm thick stereotype and is used for reducing the background radiation dose around. The side barrier 505 is made of lead glass, and the length and width dimensions of the lead glass are matched with those of the installation groove 502, and the lead glass is adhered in the installation groove 502 through waterproof glue during installation. The top plate 506 is divided into a plurality of models according to the sizes of the through holes in the middle, and is used for matching with the ray generators 6 with different sizes. The top of the U-shaped box plate 501 and the edges of the top plate 506 are provided with matching screw holes for securing the top plate 506 to the top of the box plate 501. In addition, the bottom of the water tank 5 and the metal plate 9 need to be tightly connected and locked to prevent sliding during use.
The main body of the adapter 7 is of a tubular structure, one end of the main body is closed, and the other end of the main body expands radially to the periphery to form an annular extension part. The adapter mounting hole 503 may be provided as a threaded hole, and the outer wall of the adapter 7 is formed with an external thread matching therewith. When the adaptor 7 is mounted, the waterproof gasket 8 is first fitted over the adaptor 7, the closed end of the adaptor 7 is then passed from the outside of the water tank 5 into the water tank 5 through the adaptor mounting hole 503, and finally screwed so that the extension and the U-shaped tank plate 501 tightly clamp the waterproof gasket 8. Two adapter 7 positions are reserved on the water tank 5, one of which can be used for measurement in the horizontal direction and the other for measurement in the vertical direction. The adapter 7 can be designed in a number of models for adapting to different sizes of detectors. The adapters 7 of different sizes have the same outer diameter (mainly the section with the external thread) but different inner diameter and length. Furthermore, the closed end of the adapter 7 is depicted in fig. 10 as cylindrical, where in fact other shapes are possible, depending on the ionization chamber to be adapted.
The utility model discloses an application procedure does:
s1: the metal plate 9 is placed on a horizontal table top, and the horizontal bubble indication on the surface of the metal plate is observed to ensure that the metal plate is placed horizontally without inclination.
S2: the three-dimensional displacement table 2 and the water tank 5 are installed on the surface of the metal plate 9 and locked (the three-dimensional displacement table 2 and the metal plate 9 are locked through screws, and the water tank 5 is bonded on the surface of the metal plate 9) so as to prevent sliding.
S3: depending on the size of the radiation generator 6, the appropriate adaptor 4 and top plate 506 are selected. The horizontal supporting plate 1 is arranged on the three-dimensional displacement table 2, and the ray generator 6 is arranged on the rotating table 3 through the adapter 4.
S4: the appropriate adapter 7 is selected and fixed to the tank 5 and the probe inserted.
S5: water is filled into the water tank 5 through a water pipe 504, and a valve on the water pipe 504 is closed after the water is filled.
S6: and adjusting a Z-axis adjusting knob 201, an X-axis adjusting knob 202 and a Y-axis adjusting knob 203, positioning a radioactive source, implementing measurement and recording data.
Further, there are generally two measurement methods for the step S6.
First, measurement in the vertical direction: after the Z-axis adjusting knob 201, the X-axis adjusting knob 202 and the Y-axis adjusting knob 203 are finely adjusted, the accurate position of the radioactive source is determined according to the readings of the scales on the lifting table 204 and the two translation tables 205; inserting the detector into an adapter 7 at the lower end position (namely, the position closer to the bottom surface of the U-shaped box plate 501), emitting rays, reading the value of the detector and recording the value; the Z-axis adjusting knob 201 is adjusted for multiple times, the distance between the radioactive source and the detector in the adapter 7 is changed according to the measurement requirement, data is recorded, the change of a dose depth curve of the ray in the vertical direction can be obtained, and the radiation quality of the ray is further obtained.
Second, horizontal ray syntropy measurement: after the Z-axis adjusting knob 201, the X-axis adjusting knob 202 and the Y-axis adjusting knob 203 are finely adjusted, the accurate position of the radioactive source is determined; inserting the detector into the adapter 7 in the upper position (i.e. closer to the top plate 506), beaming out, recording the values and the angle indication in the rotary table 3; the angle adjusting knob 304 is adjusted for many times, the required change angle is selected, the rays are emitted, the detector values under different angles are recorded, and then the measurement result of the ray homodromous consistency of the rays in the horizontal direction is obtained.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A quality control detection device of a low-energy X-ray brachytherapy machine is characterized by comprising a ray generator bracket and a water tank (5); the ray generator support comprises a three-dimensional displacement table (2) and a horizontal supporting plate (1) with one end mounted on the three-dimensional displacement table (2), the other end of the horizontal supporting plate (1) is provided with a rotating table (3), and a water tank (5) is arranged below the rotating table (3); an adapter (7) is installed on the side wall of the water tank (5), the main body of the adapter (7) is located in the water tank (5), and a mounting hole for inserting a detector is formed in the adapter (7); a through hole is formed on the top plate (506) of the water tank (5); install ray generator (6) on revolving stage (3), the via hole that the radiation source of ray generator (6) passed on revolving stage (3) and roof (506) gets into inside water tank (5).
2. The quality control and detection device of the low-energy X-ray brachytherapy machine according to claim 1, wherein the three-dimensional displacement table (2) and the water tank (5) are mounted on a metal plate (9).
3. The quality control device of a low-energy X-ray brachytherapy machine according to claim 1, wherein the three-dimensional displacement stage (2) comprises a lift stage (204) and two translation stages (205) stacked one on top of the other; the three-dimensional displacement platform (2) drives the horizontal supporting plate (1) to reciprocate in the vertical direction and/or reciprocate in the horizontal direction along two mutually perpendicular directions.
4. The quality control and detection device for the low-energy X-ray brachytherapy machine according to claim 1, wherein the radiation generator (6) is mounted on the rotary table (3) through an adapter (4), and the adapter (4) is provided with a locking mechanism.
5. The quality control and detection device of the low-energy X-ray brachytherapy machine according to claim 1, wherein the three-dimensional displacement table (2) and the rotation table (3) are respectively provided with a graduated scale for indicating the linear displacement and the angular displacement.
6. The quality control and detection device for the low-energy X-ray brachytherapy machine according to claim 1, wherein the water tank (5) comprises a U-shaped tank plate (501), and both side edges of the U-shaped tank plate (501) are provided with mounting grooves (502) for mounting side baffles (505); two adapter mounting holes (503) for mounting the adapters (7) and a water supply and drainage hole for mounting a water pipe (504) are formed on the side wall of the U-shaped box plate (501).
7. The quality control detection device of the low-energy X-ray brachytherapy machine, according to claim 1, characterized in that the adapter (7) main body is a tubular structure, one end of the adapter (7) is closed, and the outer diameter of the other end of the adapter (7) is increased to form an annular extension part; the closed end penetrates into the water tank (5) from the outside of the water tank (5) through the adapter mounting hole (503), and a waterproof gasket (8) is arranged between the extension part and the U-shaped tank plate (501).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223033536.2U CN218824710U (en) | 2022-11-10 | 2022-11-10 | Quality control detection device of low-energy X-ray brachytherapy machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223033536.2U CN218824710U (en) | 2022-11-10 | 2022-11-10 | Quality control detection device of low-energy X-ray brachytherapy machine |
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| CN218824710U true CN218824710U (en) | 2023-04-07 |
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| CN202223033536.2U Active CN218824710U (en) | 2022-11-10 | 2022-11-10 | Quality control detection device of low-energy X-ray brachytherapy machine |
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| CN (1) | CN218824710U (en) |
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Effective date of registration: 20240619 Address after: 101520 No.12 Keji Road, Economic Development Zone, Miyun District, Beijing Patentee after: NUCLOVER TECHNOLOGY CO.,LTD. Country or region after: China Address before: 300192, 238 Bai Causeway Road, Tianjin, Nankai District Patentee before: INST OF RADIATION MEDICINE CHINESE ACAD OF MEDICAL SCIENCES Country or region before: China |
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