CN201226257Y - Low coverage built-in multi-blade grating - Google Patents
Low coverage built-in multi-blade grating Download PDFInfo
- Publication number
- CN201226257Y CN201226257Y CNU2008200248647U CN200820024864U CN201226257Y CN 201226257 Y CN201226257 Y CN 201226257Y CN U2008200248647 U CNU2008200248647 U CN U2008200248647U CN 200820024864 U CN200820024864 U CN 200820024864U CN 201226257 Y CN201226257 Y CN 201226257Y
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- blade
- grating
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- casing
- leaf optical
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- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims description 33
- 238000009434 installation Methods 0.000 claims description 8
- 230000001788 irregular Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model relates to a built-in small field multi-leaf collimator, which is used on a linear accelerator treatment head and belongs to a ray-collimating structure part in the medical equipment. A plurality of collimator leaves are placed in box bodies. The multi-leaf collimator has the following characteristics: the multi-leaf collimator is provided with a mounting bottom plate which is connected with a lower secondary accelerator collimator bottom plate; a linear guideway is arranged on the mounting bottom plate; the two opposite box bodies are mounted on the linear guideway; a box body-dragging mechanism is mounted on the box bodies; and the collimator leaves in the box bodies are respectively connected with leaf-dragging mechanisms. The multi-leaf collimator, which has the advantages of simple and reasonable structure and convenient operation, resolves the problem that a small field multi-leaf collimator cannot be permanently mounted on the accelerator head.
Description
Technical field
The utility model relates to the built-in multi-leaf optical grating of a kind of low coverage, is used for linear accelerator treatment head, belongs to ray collimating structure parts in such Medical Devices.
Background technology
On the linear accelerator treatment head, multi-leaf optical grating has two kinds, and a kind of is built-in multi-leaf optical grating, and a kind of is detachable external hanging type multi-leaf optical grating.Existing built-in multi-leaf optical grating is mainly by three types, first kind of installation site diaphragm or following stop position on the collimating apparatus of the linear accelerator second level, form by grating group and reserve collimation block, reserve collimation block is equivalent to the former diaphragm attenuate that multi-leaf optical grating substitutes, and is used to reduce radiation leakage amount between the multi-leaf optical grating blade; Second kind of following stop position that is the installation site in linear accelerator second level collimating apparatus, grating blade movement form is for making arcuate movement around the ray source point; The third installation site is below the collimating apparatus of the second level, and the casing guide rail of multi-leaf optical grating is installed on the lower shoe of accelerator secondary collimator; The maximum launched field of these three kinds of multi-leaf optical gratings is 40cm * 40cm, so grating blade logarithm is many, and common have 40,60,80,120 pairs of different specifications, and blade dimensions and range of movement are big, complicated integral structure, price height.And existing little launched field grating is detachable external hanging type structure, need execute-in-place during use, it is installed on the accelerator head, carry out irregular launched field irradiation, when accelerator is done the irradiation of conventional launched field since big inadequately stopping of its size launched field need remove again, complex operation uses very inconvenient.
The utility model content
The purpose of this utility model is to provide a kind of low coverage built-in multi-leaf optical grating, and is simple and reasonable, easy to operate, solves the problem that little launched field grating can not forever be installed on accelerator head.
The built-in multi-leaf optical grating of low coverage described in the utility model, casing is built-in to be placed with a plurality of grating blades, be provided with the installation base plate that is connected with accelerator secondary collimator lower shoe, can realize and being connected of accelerator secondary collimator lower shoe, base plate is installed is provided with line slideway, two relative casings are installed on the line slideway, and casing tractor is installed on the casing, and the grating blade in the casing is connected with blade tractor respectively.
Establish the blade guide groove on the cabinet wall of grating blade upper and lower sides correspondence, what make things convenient for the grating blade accurately moves dependable performance.
Suitable grating blade has 20～30 pairs, and the visual field is less than 25cm * 25cm.
The simple tractor of casing, blade is preferably used screw drive travel mechanism, compact conformation, dependable performance.
During application, but permanent fixation be installed on the lower shoe of accelerator secondary collimator, installation direction is that the blade movement direction is identical with following diaphragm direction of motion, accelerator AUI dish is installed in the bottom of multi-leaf optical grating by contiguous block.
When multi-leaf optical grating work, the motion by blade can form clinical irregular launched field commonly used; When multi-leaf optical grating is not worked, blade is withdrawn in the casing fully, two tanks moves to highest distance position, multi-leaf optical grating can not stop the maximum launched field of the accelerator of 40cm * 40cm, can utilize the motion of accelerator secondary collimator to form conventional launched field, comprise center symmetry rectangle launched field, asymmetric rectangle, half wild and 1/4 launched field.Can between accelerator and multi-leaf optical grating, establish safety interlock, guarantee that the multi-leaf optical grating operation is normal, and arrive assigned address, just allow the accelerator ray to go out bundle, safe and reliable.
The built-in multi-leaf optical grating of low coverage described in the utility model, the blade logarithm is less, and blade dimensions and range of movement are less.By the spacing that strengthens the casing moving range and widen two line slideways, make it both can satisfy the requirement of clinical irregular launched field irradiation commonly used, and by removing multi-leaf optical grating, can reach and not hinder conventional launched field irradiation requirement, simple and reasonable, easy to operate, solved the problem that little launched field grating can not forever be installed on accelerator head, economical and practical.
Description of drawings
Fig. 1, the utility model one embodiment casing tractor structural representation.
Fig. 2, the utility model one embodiment blade tractor structure for amplifying synoptic diagram.
Fig. 3, the utility model patent one embodiment treat a directions X cross-sectional view.。
Fig. 4, the utility model patent one embodiment treat a Y directional profile structural representation.
Among the figure: 1, base plate 2 is installed, line slideway 3, casing 4,16, nut 5, screw rod 6, locating piece 7,14, motor 8, blade guide groove 9, grating blade 10, blade tractor 11, accelerator secondary collimator lower shoe 12, fixed head 13, bolt 15, screw rod 17, ray source point 18, first order collimating apparatus 19, diaphragm 20 on the collimating apparatus of the second level, diaphragm 21 under the collimating apparatus of the second level, the built-in multi-leaf optical grating 22 of the utility model, accelerator AUI dish.
Embodiment
The utility model is described in further detail in conjunction with the foregoing description accompanying drawing.
As Fig. 1, shown in Figure 2, the built-in multi-leaf optical grating of low coverage described in the utility model, be provided with the installation base plate 1 that is connected with accelerator secondary collimator lower shoe 11, base plate 1 is installed is provided with line slideway 2, two relative casings 3 are installed on the line slideway 2, casing tractor is installed on the casing 3, casing tractor is by nut 4, screw rod 5, the screw drive travel mechanism that locating piece 6 and motor 7 are formed, casing 3 is built-in to be placed with a plurality of grating blades 9, as 20,27 and 28 etc., grating blade 9 places the blade guide groove 8 on the cabinet wall, and being connected with blade tractor respectively, blade tractor is by nut 16, screw rod 15, the screw drive travel mechanism that fixed head 12 and motor 14 are formed.
As shown in Figure 3, Figure 4, during application, can be installed on the accelerator secondary collimator lower shoe 11 by base plate 1 permanent fixation is installed, installation direction is that the blade movement direction is identical with following diaphragm direction of motion, and accelerator AUI dish 22 is installed in the bottom of the built-in multi-leaf optical grating 21 of the utility model by contiguous block.
Under the driving of motor 7, casing 3 moves on line slideway 2; Under the driving of motor 14, grating blade 9 is made relatively independent rectilinear motion along blade guide groove 8.
Ray from ray source point 17 arrives diaphragm 20 under the collimating apparatus of the second level through diaphragm on first order collimating apparatus 18 and the second level collimating apparatus 19.
When multi-leaf optical grating work, the motion by blade can form clinical irregular launched field commonly used; When multi-leaf optical grating is not worked, blade is withdrawn in the casing fully, two tanks moves to highest distance position, multi-leaf optical grating can not stop the maximum launched field of the accelerator of 40cm * 40cm, can utilize the motion of accelerator secondary collimator to form conventional launched field, comprise center symmetry rectangle launched field, asymmetric rectangle, half wild and 1/4 launched field.Can establish safety interlock at accelerator and multi-leaf optical grating, guarantee that the multi-leaf optical grating operation is normal, and arrive assigned address, just allow the accelerator ray to go out bundle, safe and reliable.
Claims (5)
1, the built-in multi-leaf optical grating of a kind of low coverage, casing is built-in to be placed with a plurality of grating blades, it is characterized in that being provided with the installation base plate that is connected with accelerator secondary collimator lower shoe, base plate is installed is provided with line slideway, two relative casings are installed on the line slideway, casing tractor is installed on the casing, and the grating blade in the casing is connected with blade tractor respectively.
2, the built-in multi-leaf optical grating of low coverage according to claim 1 is characterized in that establishing the blade guide groove on the cabinet wall of grating blade upper and lower sides correspondence.
3, the built-in multi-leaf optical grating of low coverage according to claim 1 is characterized in that the grating blade has 20～30 pairs.
4,, it is characterized in that casing tractor is screw drive travel mechanism according to claim 1, the built-in multi-leaf optical grating of 2 or 3 low coverages of stating.
5, the built-in multi-leaf optical grating of low coverage according to claim 4 is characterized in that blade tractor is screw drive travel mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200248647U CN201226257Y (en) | 2008-07-01 | 2008-07-01 | Low coverage built-in multi-blade grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200248647U CN201226257Y (en) | 2008-07-01 | 2008-07-01 | Low coverage built-in multi-blade grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201226257Y true CN201226257Y (en) | 2009-04-22 |
Family
ID=40599154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200248647U Expired - Fee Related CN201226257Y (en) | 2008-07-01 | 2008-07-01 | Low coverage built-in multi-blade grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201226257Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233426A (en) * | 2015-10-12 | 2016-01-13 | 上海联影医疗科技有限公司 | Multi-leaf collimator and blade driving method |
| US10510456B2 (en) | 2015-09-10 | 2019-12-17 | Shanghai United Imaging Healthcare Co., Ltd. | Multi-leaf collimator and driving system |
| GB2592982A (en) * | 2020-03-13 | 2021-09-15 | Elekta ltd | Leaf assembly for a multi-leaf collimator |
| US11439845B2 (en) | 2018-07-23 | 2022-09-13 | Shanghai United Imaging Healthcare Co., Ltd. | Multi-leaf collimator |
| US12138482B2 (en) | 2020-03-13 | 2024-11-12 | Elekta Limited | Multi-leaf collimator module |
| US12186589B2 (en) | 2020-03-13 | 2025-01-07 | Elekta Limited | Leaf drive mount for a multi-leaf collimator |
| US12239851B2 (en) | 2020-03-13 | 2025-03-04 | Elekta Limited | Leaf for a multi-leaf collimator |
| US12263355B2 (en) | 2020-03-13 | 2025-04-01 | Elekta Limited | Multi-leaf collimator |
-
2008
- 2008-07-01 CN CNU2008200248647U patent/CN201226257Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10510456B2 (en) | 2015-09-10 | 2019-12-17 | Shanghai United Imaging Healthcare Co., Ltd. | Multi-leaf collimator and driving system |
| US11342093B2 (en) | 2015-09-10 | 2022-05-24 | Shanghai United Imaging Healthacre Co., Ltd. | Multi-leaf collimator and driving system |
| US12334230B2 (en) | 2015-09-10 | 2025-06-17 | Shanghai United Imaging Healthcare Co., Ltd. | Multi-leaf collimator and driving system |
| CN105233426A (en) * | 2015-10-12 | 2016-01-13 | 上海联影医疗科技有限公司 | Multi-leaf collimator and blade driving method |
| CN105233426B (en) * | 2015-10-12 | 2017-11-28 | 上海联影医疗科技有限公司 | A kind of multi-leaf optical grating device and blade driving method |
| US11439845B2 (en) | 2018-07-23 | 2022-09-13 | Shanghai United Imaging Healthcare Co., Ltd. | Multi-leaf collimator |
| GB2592982A (en) * | 2020-03-13 | 2021-09-15 | Elekta ltd | Leaf assembly for a multi-leaf collimator |
| GB2592982B (en) * | 2020-03-13 | 2022-06-08 | Elekta ltd | Leaf assembly for a multi-leaf collimator |
| US12138482B2 (en) | 2020-03-13 | 2024-11-12 | Elekta Limited | Multi-leaf collimator module |
| US12186589B2 (en) | 2020-03-13 | 2025-01-07 | Elekta Limited | Leaf drive mount for a multi-leaf collimator |
| US12239851B2 (en) | 2020-03-13 | 2025-03-04 | Elekta Limited | Leaf for a multi-leaf collimator |
| US12263355B2 (en) | 2020-03-13 | 2025-04-01 | Elekta Limited | Multi-leaf collimator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090422 Termination date: 20140701 |
|
| EXPY | Termination of patent right or utility model |