CN105551559A - Projecting-range-adjustable collimator - Google Patents
Projecting-range-adjustable collimator Download PDFInfo
- Publication number
- CN105551559A CN105551559A CN201610086677.0A CN201610086677A CN105551559A CN 105551559 A CN105551559 A CN 105551559A CN 201610086677 A CN201610086677 A CN 201610086677A CN 105551559 A CN105551559 A CN 105551559A
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- China
- Prior art keywords
- collimation
- guide platform
- collimating
- launched field
- aperture
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/02—Radiation therapy using microwaves
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- High Energy & Nuclear Physics (AREA)
- General Engineering & Computer Science (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
The invention provides a projecting-range-adjustable collimator which comprises a collimation column. A plurality of collimation holes are formed in the axial direction of the collimation column, the collimation holes are different in hole diameter, the axes of the collimation holes and the axis of the collimation column are eccentrically arranged, and the distances from the collimation holes to the center axis diameter of the collimation column are the same. A guide platform is arranged on the collimation column and is coaxial with the collimation column. The guide platform comprises a radiation incident face and a radiation outlet face. A speed limiting channel is formed in the guide platform. The hole diameter of the outlet end of the speed limiting channel is larger than that of the inlet end of each collimation hole. The distance from the speed limiting channel to the center of the guide platform is the same as the distance from each collimation hole to the center of the collimation column. The collimation column rotates below the guide platform in a pivoting mode. The collimator mainly has the advantages that the collimation column rotates relative to the guide platform through a gear mechanism, the projecting range can be better selected according to requirements, the size of the collimator is greatly reduced, and the safety distance between the beam outlet end and a target is increased.
Description
Technical field
The present invention relates to a kind of radiation launched field adjusting gear, particularly relate to the device of the radiation launched field adjustment of the adjustment of a kind of accelerator treatment beam and general industry application.
Background technology
In radiation therapy process, according to the complexity of focus, different radiation launched fields often to be changed to carry out conformal radiation therapy.
The accelerator applied in current radiation therapy completes constraint and the selection of launched field mostly by two-stage collimating structure, firsts and seconds collimation all needs to do same radiation shield process, this installing space just causing overall collimation structure to need is larger, in a disguised form raise and radiated the distance exported between radiation target, reduced dose rate.
Choosing at radiation launched field, high-grade linear accelerator is the adjustment being completed launched field by the mode of multi-leaf optical grating, and its precision and operability are all fine, but its complex structure, manufacturing cost is high, difficult in maintenance, is unfavorable for popularizing.Part accelerator adopts the collimation post of single collimating aperture, and over the course for the treatment of, the mode automatically changed by computer control system adjusts launched field, and this mode adds the non-treatment time, limited to the lifting of therapeutic efficiency.
Disclose a kind of design of Ai Kerui Xchange mechanical arm collimating apparatus changer in patent 200780044846.3, have employed the collimating apparatus of independent collimating aperture, and have employed the computer control system automatically changing collimating apparatus.But during each replacing collimation, the time of cost is longer, adds sufferer and connects the subject time.
The collimating apparatus disclosed in patent ZL94247384.1 is applicable to radioactive source, and due to the calibration of its gearing, the distribution of its collimating aperture needs to adopt same calibration arrangement, restricted application.
Disclose a kind of variable field collimator in patented claim 2013100000168, but this kind of collimating apparatus precision when changing launched field is inadequate, also can depressant dose rate.
Summary of the invention
The object of the invention is to solve the problem, propose a kind of launched field zoom collimator.
Object of the present invention is achieved through the following technical solutions:
Launched field zoom collimator, comprise right cylinder surely, described collimation post be axially provided with some collimating apertures, differ in the aperture of described collimating aperture, described collimating aperture axis and described collimation mast axis eccentric setting, each described collimating aperture is equal to the center diameter of axle of described collimation post;
Guide platform is provided with above described collimation post, described guide platform and described collimation post coaxial, described guide platform comprises an incident face and and gives off actinal surface, described guide platform offers one through incident face and the beam-confining channel giving off actinal surface, the endpiece of described beam-confining channel is suitable with the inlet end aperture of described collimating aperture, generally, the endpiece of described beam-confining channel is greater than the inlet end aperture of described collimating aperture, and described speed limit passage is identical to the distance collimating post center with described collimating aperture to the distance at guide platform center;
Described collimation post pivot below described guide platform, makes the collimating aperture on described collimation post optionally carry out UNICOM with the beam-confining channel in described guide platform.
Preferably, described collimation post is connected by axle with described guide platform.
Preferably, described collimating apparatus also includes a driver, collimates post and rotate described in described driver drives.
Preferably, described collimating apparatus also comprises a control element, and described control element drives described drive operation.
Preferably, described driver is connected with gear drive, described gear drive comprises the rotating shaft be connected with driver and the gear assembly be connected with described rotating shaft, described gear assembly comprises intermeshing driving wheel and engaged wheel, described engaged wheel is placed on described collimation post, described driving wheel engagement is placed in the side of described engaged wheel, and described driving wheel is connected with driver by rotating shaft.
Preferably, described driver is placed in above described guide platform, and described rotating shaft is through described guide platform, and rotating shaft two ends are connected with described driver and described driving wheel respectively.
Preferably, described collimating aperture circumference uniform distribution is on described collimation post.
Preferably, described collimating aperture is tapered.
Preferably, described beam-confining channel is tapered.
Preferably, described collimating apparatus also comprises one for the shielding body of radiation-screening, and described shielding body is fixedly placed in below described guide platform, and encloses and be placed in outside described collimation post.
Preferably, in described collimation post, collimating aperture and launched field relation meet following formula: h
1(c-a)=h (b-a), wherein h is the vertical range between collimating aperture inlet end to launched field; h
1for the vertical height of collimating aperture, a is the bore of collimating aperture inlet end, and b is collimating aperture outlet port footpath, and c is the diameter of launched field.
Beneficial effect of the present invention is mainly reflected in: utilize gear mechanism to carry out collimating relatively rotating of post and guide platform, better select launched field as required, greatly reduce the size of collimating apparatus, the distance furthered out between Shu Duanyu target, promote significant to radiocurable security and dose rate, positioning precision with timer is high, cost is low, and it is convenient to safeguard, is applicable to various radiation from machine occasion, be widely used, practical.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, technical solution of the present invention is described further:
Fig. 1: structural representation of the present invention.
Fig. 2: the relation schematic diagram of collimating aperture of the present invention and launched field.
Embodiment
Present invention is disclosed a kind of launched field zoom collimator, as shown in Figure 1, comprise right cylinder 2 surely, described collimation post 2 be axially provided with some collimating apertures 21, in order to realize the adjustment better to radiation field size, differ in the aperture of described collimating aperture 21.Described collimating aperture 21 axis and described collimation post 2 eccentric axis are arranged, each described collimating aperture to the central shaft footpath of described collimation post apart from equal.State collimating aperture 21 circumference uniform distribution on described collimation post, described collimating aperture 21 is tapered.
Be provided with guide platform 3 above described collimation post 2, described collimation post 2 is connected by axle 4 with described guide platform 3.Concrete, described collimation post 2 is placed on described axle 4 by bearing 8.
Described guide platform 3 comprises an incident face and and gives off actinal surface, described guide platform offers one through incident face and the beam-confining channel 31 giving off actinal surface, the endpiece 33 of described beam-confining channel 31 is suitable with inlet end 22 aperture of described collimating aperture 21, and the distance at described speed limit passage 31 to guide platform center is equal to the distance collimating post center with described collimating aperture 21.
During use, described speed limit passage 31 is coaxial with described collimating aperture 21, namely collimates the endpiece 33 that post 2 is placed in speed limit passage 31, makes beam of radiation enter collimating aperture 21 from the inlet end 32 of beam-confining channel 31 through speed limit passage 31 and arrives target location.
Described collimating apparatus also comprises a control element, and described control element drives described driver 1 to work.Described control element also can adopt software control for mechanical organ.Described driver 1 is connected with gear drive, and described gear drive comprises the rotating shaft 7 be connected with driver 1 and the gear assembly be connected with described rotating shaft 7.Described gear mechanism connection is placed in outside described collimation post, and described driver 1 drives described gear mechanism to drive described collimation post 2 to rotate, and makes the collimating aperture 21 in described collimating apparatus optionally carry out UNICOM with the beam-confining channel 31 in described guide platform 3.
Concrete, described gear mechanism comprises intermeshing driving wheel 6 and engaged wheel 5, and described engaged wheel 5 is placed on described collimation post 2, and described driving wheel 6 engagement is placed in the side of described engaged wheel 5, and described driving wheel 6 is connected with driver 1 by rotating shaft 7.Described driver 1 is placed in above described guide platform 3, and described rotating shaft 7 is through described guide platform 3, and rotating shaft 7 two ends are connected with described motor 1 and described driving wheel 6 respectively.
In order to better learn the relation between collimating aperture and launched field, as shown in Figure 2, in described collimation post, collimating aperture and launched field and relation meet following formula: h
1(c-a)=h (b-a), wherein h is the vertical range between collimating aperture inlet end to launched field; h
1for the vertical height of collimating aperture, a is the bore of collimating aperture inlet end, and b is collimating aperture outlet port footpath, and c is the diameter of launched field.
Generally, required launched field diameter is known, and the vertical range between the collimation height of post and collimating aperture entrance port to launched field is known, can draw the bore of collimating aperture endpiece, namely learn that between collimating aperture, angle of taper is arranged according to the bore of collimating aperture inlet end.
Because Radiation On Human body has certain harm, in order to avoid the impact that unnecessary Radiation On Human body causes, described collimating apparatus also comprises one for the shielding body 9 of radiation-screening, and described shielding body 9 is fixedly placed in below described guide platform, and encloses and be placed in outside described collimation post 2.Described shielding body 9 all adopts shielding material to make with guide platform 3.Described shielding body does not have concrete shape to arrange, and only needing its complementary space around by collimating aperture 21 to be included in the inside can achieve the goal, and the above its complementary space refers to the non-athletic space around collimating aperture.
The present invention greatly reduces the size of collimating apparatus, adds the space of further elevator dose rate, promotes significant to radiocurable security and dose rate, positioning precision with timer is high, and cost is low, and it is convenient to safeguard, be applicable to various accelerator and penetrate occasion, be widely used, practical.
The present invention still has multiple concrete embodiment, and all employings are equal to replacement or equivalent transformation and all technical schemes of being formed, all drop within the scope of protection of present invention.
Claims (10)
1. launched field zoom collimator, comprise right cylinder surely, it is characterized in that: described collimation post be axially provided with some collimating apertures, differ in the aperture of described collimating aperture, described collimating aperture axis and described collimation mast axis eccentric setting, each described collimating aperture is equal to the center diameter of axle of described collimation post;
Guide platform is provided with above described collimation post, described guide platform and described collimation post coaxial, described guide platform comprises an incident face and and gives off actinal surface, described guide platform offers one through incident face and the beam-confining channel giving off actinal surface, the endpiece aperture of described beam-confining channel is greater than the inlet end aperture of described collimating aperture, and described speed limit passage is equal to the distance collimating post center with described collimating aperture to the distance at guide platform center;
Described collimation post pivot below described guide platform, makes the collimating aperture on described collimation post optionally carry out UNICOM with the beam-confining channel in described guide platform.
2. launched field zoom collimator according to claim 1, is characterized in that: described collimation post is connected by axle with described guide platform.
3. launched field zoom collimator according to claim 1, is characterized in that: described collimating apparatus also includes a driver, collimates post and rotate described in described driver drives.
4. launched field zoom collimator according to claim 3, it is characterized in that: described collimating apparatus also includes a control element, described control element drives described drive operation.
5. launched field zoom collimator according to claim 3, it is characterized in that: described driver is connected with gear drive, described gear drive comprises the rotating shaft be connected with driver and the gear assembly be connected with described rotating shaft, described gear assembly comprises intermeshing driving wheel and engaged wheel, described engaged wheel is placed on described collimation post, described driving wheel engagement is placed in the side of described engaged wheel, and described driving wheel is connected with driver by rotating shaft.
6. launched field zoom collimator according to claim 2, is characterized in that: described driver is placed in above described guide platform, and described rotating shaft is through described guide platform, and rotating shaft two ends are connected with described driver and described driving wheel respectively.
7. launched field zoom collimator according to claim 1, is characterized in that: described collimating aperture circumference uniform distribution is on described collimation post.
8. launched field zoom collimator according to claim 1, it is characterized in that: described collimating aperture is tapered, described beam-confining channel is tapered.
9. launched field zoom collimator according to claim 1, is characterized in that: described collimating apparatus also comprises one for the shielding body of radiation-screening, and described shielding body is fixedly placed in below described guide platform, and encloses and be placed in outside described collimation post.
10. launched field zoom collimator according to claim 1, is characterized in that: in described collimation post, collimating aperture and launched field relation meet following formula: h
1(c-a)=h (b-a), wherein h is the vertical range between collimating aperture inlet end to launched field; h
1for the vertical height of collimating aperture, a is the bore of collimating aperture inlet end, and b is collimating aperture outlet port footpath, and c is the diameter of launched field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086677.0A CN105551559A (en) | 2016-02-16 | 2016-02-16 | Projecting-range-adjustable collimator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086677.0A CN105551559A (en) | 2016-02-16 | 2016-02-16 | Projecting-range-adjustable collimator |
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| Publication Number | Publication Date |
|---|---|
| CN105551559A true CN105551559A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610086677.0A Pending CN105551559A (en) | 2016-02-16 | 2016-02-16 | Projecting-range-adjustable collimator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219291A1 (en) * | 2016-06-22 | 2017-12-28 | 深圳市奥沃医学新技术发展有限公司 | Collimator, therapeutic head and radiotherapy apparatus |
| CN110404181A (en) * | 2018-04-26 | 2019-11-05 | 瑞地玛医学科技有限公司 | A kind of radiotherapy equipment and its beam-defining clipper |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4085328A (en) * | 1975-10-20 | 1978-04-18 | U.S. Philips Corporation | X-ray examining device |
| CN2213545Y (en) * | 1994-12-19 | 1995-11-29 | 宋世鹏 | Collimator of changable ray beam diameter |
| CN201600339U (en) * | 2010-01-20 | 2010-10-06 | 纳优科技（北京）有限公司 | Filtering collimator combined device of X-ray fluorescence spectrometer |
| CN205428509U (en) * | 2016-02-16 | 2016-08-03 | 苏州爱因智能设备有限公司 | Adjustable collimater of launched field |
-
2016
- 2016-02-16 CN CN201610086677.0A patent/CN105551559A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4085328A (en) * | 1975-10-20 | 1978-04-18 | U.S. Philips Corporation | X-ray examining device |
| CN2213545Y (en) * | 1994-12-19 | 1995-11-29 | 宋世鹏 | Collimator of changable ray beam diameter |
| CN201600339U (en) * | 2010-01-20 | 2010-10-06 | 纳优科技（北京）有限公司 | Filtering collimator combined device of X-ray fluorescence spectrometer |
| CN205428509U (en) * | 2016-02-16 | 2016-08-03 | 苏州爱因智能设备有限公司 | Adjustable collimater of launched field |
Non-Patent Citations (2)
| Title |
|---|
| 金永杰等: "《核医学仪器与方法》", 31 January 2010, 哈尔滨工程大学出版社 * |
| 黄宗祺等: "《核物理与核医学仪器》", 30 November 1995, 原子能出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219291A1 (en) * | 2016-06-22 | 2017-12-28 | 深圳市奥沃医学新技术发展有限公司 | Collimator, therapeutic head and radiotherapy apparatus |
| CN110404181A (en) * | 2018-04-26 | 2019-11-05 | 瑞地玛医学科技有限公司 | A kind of radiotherapy equipment and its beam-defining clipper |
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Application publication date: 20160504 |