CN104225805A - Radiation head of medical accelerator - Google Patents
Radiation head of medical accelerator Download PDFInfo
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- CN104225805A CN104225805A CN201410404410.2A CN201410404410A CN104225805A CN 104225805 A CN104225805 A CN 104225805A CN 201410404410 A CN201410404410 A CN 201410404410A CN 104225805 A CN104225805 A CN 104225805A
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Abstract
The invention discloses a radiation head of a medical accelerator. The radiation head comprises a primary collimator, a flattening filter and a fine adjustment mechanism. The fine adjustment mechanism comprises a rotary seat, a first adjusting screw, a second adjusting screw, a first adjusting block and a second adjusting block. According to the radiation head of the medical accelerator, fine adjustment is conducted on the position of the flattening filter through handles and the adjusting screws, and the adjustment process is simple; the position of the flattening filter in the circumferential direction is adjusted by rotating the rotary seat, the position of the flattening filter in the radial direction is adjusted through the adjusting blocks and the adjusting screws, a limiting surface used for limiting the movement direction of the flattening filter is provided for adjustment in each direction, in this way, the flattening filter can be adjusted in place according to a preset position, and positioning is more accurate; in the fine adjustment process, the axis of a beam outlet hole of the primary collimator and the center axis of the rotary seat coincide all the time, and therefore a projecting range penumbra caused by adjustment is avoided.
Description
Technical field
The present invention relates to radiotherapy tumor area, be specifically related to a kind of radiation head of medical accelerator.
Background technology
Medical accelerator biomedicine is used for carry out radiocurable particle accelerator device to tumor.By microwave, electron beam is accelerated, form high-velocity electrons line, then produce X-ray by high-velocity electron beam bombardment heavy metal target.In clinical practice, uneven X-ray can increase skin dose, produces harm to patient, therefore wishes that X-ray is even in radiation field size scope interior lines matter.And the Energy distribution of the X-ray of the actual generation of medical accelerator uneven, but in the angular range very little in incident direction of integrated distribution, do not meet the clinical requirement to ray energy distribution, so carry out expansion with expansion device to X-ray in accelerator.
The corresponding difform expansion device of X-ray of different-energy, and need to ensure the central axis of expansion device and the dead in line of X-ray.Because the axial location of X-ray cannot be determined in process of production, the position of expansion device is therefore needed to have certain adjustability, to be applicable to the change in location of clinac ray center axle.
Prior art CN202409871U discloses a kind of clinac expansion filter governor motion, as shown in Figure 1, comprise example of primary collimator 1 and expansion filter 6, four relative chutes are provided with in example of primary collimator 1, what expansion filter 6 was positioned at example of primary collimator 1 goes out beam hole, the fixed block 2 for fixing expansion filter 6 and regulating member is provided with in example of primary collimator 1, fixed block 2 is connected with example of primary collimator by hold-down screw 3, be provided with for four regulating blocks 4 of independent regulation expansion filter 6 in GT and AB direction in example of primary collimator 1, and be connected with fixed block 2 by adjustment screw 5, regulating block 4 is located in described chute, and be inclined-plane with expansion filter 6 contact surface.
This governor motion realizes the adjustment in the two directions of expansion device by four regulating blocks, but the adjustment due to each direction needs to unclamp another one direction raises the adjustment screw of saving, expansion device moving direction does not limit, there is uncertainty in the direction that expansion device regulates, can not put in place by the position adjustments preset, therefore need to regulate repeatedly, convenient not.
Summary of the invention
In order to solve the problems of the prior art, the present invention proposes a kind of radiation head of medical accelerator, this radiation head comprises the micro-adjusting mechanism of expansion device, and adjustment process is simple, and location is more accurate, can not produce launched field penumbra because of adjustment.
In order to achieve the above object, the radiation head of a kind of medical accelerator of the present invention comprises:
Example of primary collimator, described example of primary collimator comprises beam hole;
Expansion device, described expansion device into a cone shape, goes out beam hole described in being positioned at;
Micro-adjusting mechanism, for regulating the position of described expansion device;
Wherein, described micro-adjusting mechanism comprises:
Rotating seat, is arranged in described example of primary collimator, for regulating the angle of described expansion device.
Optionally, the first circular groove is set in described example of primary collimator, the central shaft of described first circular groove and described go out the dead in line of beam hole, described turning seat in described first circular groove, and rotates along the inwall of described first circular groove.
Optionally, described micro-adjusting mechanism comprises the first hold-down screw and the second hold-down screw, and described rotating seat is fixed in described example of primary collimator by described first hold-down screw and described second hold-down screw.
Optionally, the outward flange of described rotating seat arranges first surface of revolution, and described first hold-down screw and described second hold-down screw all compress with described first surface of revolution and contact.
Optionally, described rotating seat arranges handle, for controlling the anglec of rotation of described rotating seat.
Optionally, described handle is 2.
Optionally, described micro-adjusting mechanism also comprises the first adjustment screw and the second adjustment screw and the first adjustment block and the second adjustment block, described first adjustment screw is connected with described rotating seat through described first adjustment block, and described second adjustment screw is connected with described rotating seat through described second adjustment block.
Optionally, second circular groove is set in described rotating seat, the central shaft of described second circular groove and described go out the dead in line of beam hole, described first adjustment screw, described second adjustment screw, described first adjustment block and described second adjustment block are all arranged in described second circular groove.
Optionally, described first adjustment block arranges the first perforation, described first adjustment screw is through described first perforation, be threaded with described rotating seat, the diameter of described first perforation makes described first adjustment screw be fastened in described first adjustment block, and described first adjustment block is close to the spiral shell head of described first adjustment screw.
Optionally, described second adjustment block arranges the second perforation, described second adjustment screw is through described second perforation, be threaded with described rotating seat, described biperforate diameter makes described second adjustment screw be fastened in described second adjustment block, and described second adjustment block is close to the spiral shell head of described second adjustment screw.
Optionally, described expansion device arranges the second inclined-plane, described first adjustment block becomes the 3rd inclined-plane with the contact surface on described second inclined-plane, and described second adjustment block becomes the 4th inclined-plane with the contact surface on described second inclined-plane.
Optionally, described second inclined-plane is two planes, and described second inclined-plane, described 3rd inclined-plane are identical with the angle of inclination on described 4th inclined-plane.
Compared to expansion device governor motion of the prior art, the invention has the beneficial effects as follows:
1, the present invention utilizes handle and the position of adjustment screw to expansion device to finely tune, and adjustment process is simple;
2, regulate expansion device in the position of circumferencial direction by rotating seat, regulate expansion device in the position of radial direction by adjustment block and adjustment screw, the confined planes of the restricted expansion device of the adjustment on each direction moving direction, can make expansion device put in place by the position adjustments preset, locate more accurate;
3, in trim process, the axis going out beam hole and rotating seat of example of primary collimator overlaps all the time, can not produce launched field penumbra because of adjustment.
Accompanying drawing explanation
Fig. 1 is the structural representation of clinac expansion filter governor motion in prior art
Fig. 2 is the structural representation of the radiation head of medical accelerator of the present invention;
Fig. 3 is the structural representation of Fig. 2 along A-A section;
Fig. 4 is the structural representation of Fig. 2 along B-B section;
Fig. 5 is the partial enlarged drawing of the position A in Fig. 4;
Detailed description of the invention
Below in conjunction with accompanying drawing 2-5, the present invention will be further described.
As shown in Figure 2, the radiation head of medical accelerator of the present invention comprises example of primary collimator 1, micro-adjusting mechanism, expansion device 2, described micro-adjusting mechanism is arranged in example of primary collimator 1, composition graphs 3, example of primary collimator 1 comprises beam hole, expansion device 2 into a cone shape, goes out beam hole described in being positioned at, and is supported in example of primary collimator 1 by described micro-adjusting mechanism.
Composition graphs 2 and Fig. 3, described micro-adjusting mechanism, for regulating the position of expansion device 2, comprise rotating seat 3, rotating seat 3 is positioned at example of primary collimator 1, for supporting expansion device 2.First circular groove is set in example of primary collimator 1, the central shaft of described first circular groove and the dead in line going out beam hole of example of primary collimator 1, rotating seat 3 is positioned at described first circular groove, and rotate along the inwall of described first circular groove around the axis going out beam hole of example of primary collimator 1, the central shaft of rotating seat 3 and the dead in line going out beam hole of example of primary collimator 1.
Described micro-adjusting mechanism also comprises the first hold-down screw 4, second hold-down screw 5, first hold-down screw 4 and rotating seat 3 is fixed in example of primary collimator 1 by the second hold-down screw 5 combined effect.In example of primary collimator 1, correspondence position arranges screw respectively, screws in for the first hold-down screw 4 and the second hold-down screw 5.As shown in Figure 3, at the outward flange of rotating seat 3, first surface of revolution 8 is set, first hold-down screw 4 and the second hold-down screw 5 are screwed in corresponding screw, first hold-down screw 4 all compresses with first surface of revolution 8 with the spiral shell head of the second hold-down screw 5 and contacts, thus is pressed in example of primary collimator 1 by rotating seat 3.In the present embodiment, the shape of first surface of revolution 8 is the curved surface of straight line around the central shaft rotated shape of rotating seat 3 of the inclined of relative rotating seat 3.
Rotating seat 3 is for adjusting the angle of expansion device 2.Rotating seat 3 arranges handle 9, and in this embodiment, handle 9 is two, and symmetrical about the central shaft of rotating seat 3, and by rotating handles 9, driven rotary seat 3 rotates, the adjustment angle position of rotating seat 3 in example of primary collimator.
Described micro-adjusting mechanism also comprises the first adjustment screw 6 and the second adjustment screw 7, and first adjustment block 10 and the second adjustment block 11, first adjustment screw 6 and the second adjustment screw 7 symmetrical about the central shaft of rotating seat 3, on rotating seat 3, the position of corresponding first adjustment screw 6 and the second adjustment screw 7 arranges screw, screws in for the first adjustment screw 6 and the second adjustment screw 7.
Second circular groove is set in rotating seat 3, the central shaft of described second circular groove and described go out the dead in line of beam hole, the first adjustment screw 6, second adjustment screw 7, first adjustment block 10 and the second adjustment block 11 are all arranged in described second circular groove.First adjustment block 10 and the second adjustment block 11 along the radial distribution of described second circular groove, all with the side close contact of expansion device 2.
As shown in Figure 5, the side of expansion device arranges the second inclined-plane 12, in this embodiment, second inclined-plane is two planes, the contact surface on the first adjustment block 10 and the second inclined-plane 12 is set to the 3rd inclined-plane 13, the contact surface on the second adjustment block 11 and the second inclined-plane 12 is set to the 4th inclined-plane 14, and in this embodiment, the 3rd inclined-plane 13 is identical with the angle of inclination on the second inclined-plane 12 with the angle of inclination on the 4th inclined-plane 14.
First adjustment block 10 is arranged the first perforation 15, first adjustment screw 6 is through the first perforation 15, connect with the corresponding screw on rotating seat 3, the diameter of the first perforation 15 makes the first adjustment screw 6 be fastened in the first adjustment block 10, and the first adjustment block 10 is close to the spiral shell head of the first adjustment screw 6; Second adjustment block 11 is arranged the second perforation 16, second adjustment screw 7 is through the second perforation 16, connect with the corresponding screw on rotating seat 3, the diameter of the second perforation 16 makes the second adjustment screw 7 be fastened in the second adjustment block 11, second adjustment block 11 is close to the spiral shell head of the second adjustment screw 7, such vibrational power flow ensures that the first adjustment block 10, second adjustment block 11 is stabilized in the first adjustment screw 6 and the second adjustment screw 7 respectively, and adjustment screw that can not be relatively respective is slided.
Under this structure, unclamp the second adjustment screw 7, by rotating the first adjustment screw 6, the first corresponding adjustment block 10 is moved along the central axis direction of rotating seat 3 together along with the first adjustment screw 6, due to the interaction on inclined-plane, first adjustment block 10 promotes the radial direction of expansion device 2 along the second circular groove, namely the direction of the first adjustment screw 6 and the second adjustment screw 7 line is moved, same mode, when rotation second adjustment screw 7, the second corresponding adjustment block 11 is moved along the central axis direction of rotating seat together along with the second adjustment screw 7, due to the interaction on inclined-plane, second adjustment block 11 promotes the radial direction of expansion device 2 along the second circular groove, namely the direction of the first adjustment screw 6 and the second adjustment screw 7 line is moved, thus the radial position achieving expansion device regulates.In order to ensure that the first adjustment block 10 and the second adjustment block 11 have enough spaces when moving along the central axis direction of rotating seat 3, two square hole (not shown) are set in the position of the corresponding screw in the second circular groove bottom surface of rotating seat 3, to increase the space of the first adjustment block 10 and the motion of the second adjustment block 11.
In a particular application, the axial location of X-ray is determined, by regulating angle in example of primary collimator of expansion device and radial position, can adjust the position of expansion device central shaft, thus making the central shaft of expansion device and the dead in line of X-ray.
The radiation head of medical accelerator provided by the invention uses handle and the position of adjustment screw to expansion device to finely tune, and adjustment process is simple; Regulate expansion device in the position of circumferencial direction by rotating seat, regulate expansion device in the position of radial direction by adjustment block and adjustment screw, the confined planes of the restricted expansion device of the adjustment on each direction moving direction, can make expansion device put in place by the position adjustments preset, locate more accurate; In trim process, the axis going out beam hole and rotating seat of example of primary collimator overlaps all the time, can not produce launched field penumbra because of adjustment.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to the present invention.Any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (12)
1. a radiation head for medical accelerator, comprising:
Example of primary collimator, described example of primary collimator comprises beam hole;
Expansion device, described expansion device into a cone shape, goes out beam hole described in being positioned at;
Micro-adjusting mechanism, for regulating the position of described expansion device;
It is characterized in that, described micro-adjusting mechanism comprises rotating seat, is arranged in described example of primary collimator, for regulating the angle of described expansion device.
2. the radiation head of a kind of medical accelerator as claimed in claim 1, it is characterized in that, first circular groove is set in described example of primary collimator, the central shaft of described first circular groove and described go out the dead in line of beam hole, described turning seat in described first circular groove, and rotates along the inwall of described first circular groove.
3. the radiation head of a kind of medical accelerator as claimed in claim 1, it is characterized in that, described micro-adjusting mechanism comprises the first hold-down screw and the second hold-down screw, and described rotating seat is fixed in described example of primary collimator by described first hold-down screw and described second hold-down screw.
4. the radiation head of a kind of medical accelerator as claimed in claim 3, is characterized in that, the outward flange of described rotating seat arranges first surface of revolution, and described first hold-down screw and described second hold-down screw all compress with described first surface of revolution and contact.
5. the radiation head of a kind of medical accelerator as claimed in claim 1, is characterized in that, described rotating seat arranges handle, for controlling the anglec of rotation of described rotating seat.
6. the radiation head of a kind of medical accelerator as claimed in claim 5, is characterized in that, described handle is 2.
7. the radiation head of medical accelerator as claimed in claim 1, it is characterized in that, described micro-adjusting mechanism also comprises the first adjustment screw and the second adjustment screw and the first adjustment block and the second adjustment block, described first adjustment screw is connected with described rotating seat through described first adjustment block, and described second adjustment screw is connected with described rotating seat through described second adjustment block.
8. the radiation head of a kind of medical accelerator as claimed in claim 7, it is characterized in that, second circular groove is set in described rotating seat, the central shaft of described second circular groove and described go out the dead in line of beam hole, described first adjustment screw, described second adjustment screw, described first adjustment block and described second adjustment block are all arranged in described second circular groove.
9. the radiation head of a kind of medical accelerator as claimed in claim 8, it is characterized in that, described first adjustment block arranges the first perforation, described first adjustment screw is through described first perforation, be threaded with described rotating seat, the diameter of described first perforation makes described first adjustment screw be fastened in described first adjustment block, and described first adjustment block is close to the spiral shell head of described first adjustment screw.
10. the radiation head of a kind of medical accelerator as claimed in claim 9, it is characterized in that, described second adjustment block arranges the second perforation, described second adjustment screw is through described second perforation, be threaded with described rotating seat, described biperforate diameter makes described second adjustment screw be fastened in described second adjustment block, and described second adjustment block is close to the spiral shell head of described second adjustment screw.
The radiation head of 11. a kind of medical accelerators as claimed in claim 7, it is characterized in that, described expansion device arranges the second inclined-plane, and described first adjustment block becomes the 3rd inclined-plane with the contact surface on described second inclined-plane, and described second adjustment block becomes the 4th inclined-plane with the contact surface on described second inclined-plane.
The radiation head of 12. a kind of medical accelerators as claimed in claim 11, is characterized in that, described second inclined-plane is two planes, and described second inclined-plane, described 3rd inclined-plane are identical with the angle of inclination on described 4th inclined-plane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410404410.2A CN104225805B (en) | 2014-08-15 | 2014-08-15 | A kind of radiation head of medical accelerator |
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| CN201410404410.2A CN104225805B (en) | 2014-08-15 | 2014-08-15 | A kind of radiation head of medical accelerator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106267588A (en) * | 2016-08-18 | 2017-01-04 | 上海联影医疗科技有限公司 | Collimator positioner assembly and its localization method |
| CN106267587A (en) * | 2016-08-18 | 2017-01-04 | 上海联影医疗科技有限公司 | Collimator positioner assembly |
| CN109793995A (en) * | 2019-01-31 | 2019-05-24 | 新里程医用加速器(无锡)有限公司 | A kind of radiation from machine head expansion device structure for saving treatment space |
| CN112587811A (en) * | 2020-12-13 | 2021-04-02 | 中国航空工业集团公司北京航空精密机械研究所 | Tungsten-copper alloy homogenizing block for medical linear accelerator |
| CN114217406A (en) * | 2021-11-30 | 2022-03-22 | 歌尔光学科技有限公司 | Lens focusing mechanism, projection module and electronic equipment |
| CN115137995A (en) * | 2021-03-31 | 2022-10-04 | 西门子医疗有限公司 | Interface module for an X-ray collimator and collimator comprising such an interface module |
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| JP2003079753A (en) * | 2001-09-10 | 2003-03-18 | Hitachi Medical Corp | Radiotherapy equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106267588A (en) * | 2016-08-18 | 2017-01-04 | 上海联影医疗科技有限公司 | Collimator positioner assembly and its localization method |
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| CN112587811A (en) * | 2020-12-13 | 2021-04-02 | 中国航空工业集团公司北京航空精密机械研究所 | Tungsten-copper alloy homogenizing block for medical linear accelerator |
| CN115137995A (en) * | 2021-03-31 | 2022-10-04 | 西门子医疗有限公司 | Interface module for an X-ray collimator and collimator comprising such an interface module |
| US11779291B2 (en) | 2021-03-31 | 2023-10-10 | Siemens Healthcare Gmbh | Interface module for x-ray collimator |
| CN115137995B (en) * | 2021-03-31 | 2023-11-17 | 西门子医疗有限公司 | Interface module for an X-ray collimator and collimator comprising such an interface module |
| CN114217406A (en) * | 2021-11-30 | 2022-03-22 | 歌尔光学科技有限公司 | Lens focusing mechanism, projection module and electronic equipment |
| CN114217406B (en) * | 2021-11-30 | 2024-02-09 | 歌尔光学科技有限公司 | Lens focusing mechanism, projection module and electronic equipment |
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Address after: 201815 No. 1180 Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201815 No. 1180 Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
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Address after: 201807 2258 Chengbei Road, Jiading District, Shanghai Patentee after: Shanghai Lianying Medical Technology Co.,Ltd. Address before: 201815 No. 1180 Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee before: Shanghai Lianying Medical Technology Co.,Ltd. |