CN101757737A - Multi-leaf collimator and radiotherapy device - Google Patents
Multi-leaf collimator and radiotherapy device Download PDFInfo
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- CN101757737A CN101757737A CN200810185239A CN200810185239A CN101757737A CN 101757737 A CN101757737 A CN 101757737A CN 200810185239 A CN200810185239 A CN 200810185239A CN 200810185239 A CN200810185239 A CN 200810185239A CN 101757737 A CN101757737 A CN 101757737A
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- impeller
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Abstract
The invention discloses a multi-leaf collimator capable of setting the irradiation scope of radioactive ray highly accurately and a radiotherapy device. A multi-leaf collimator (1) sets the irradiation scope of radioactive ray in correspondence to the shape of focus inside patients. The multi-leaf collimator (1) is provided with a pair of leaf plate groups (10) and a pair of driving units (12). The leaf plate groups (10) include a plurality of leaf plates (14A, 14B) which are arrayed in the direction orthogonal to an irradiation axis (A) of the radioactive ray. The driving units (12) include a plurality of driving mechanism columns which are provided, in an arrayed manner, with a plurality of driving mechanisms (24) along the irradiation axis (A), wherein the driving mechanisms (24) are connected with the leaf plates (14A, 14B) in the way of one-to-one and drive the leaf plates (14A, 14B) in the array direction of the leaf plate groups (10). The driving units (12) are nearer the side of a radioactive ray source irradiating the radioactive ray compared with the leaf plates (14A, 14B).
Description
Technical field
The present invention relates to a kind of multi-diaphragm collimator, set the range of exposures of lonizing radiation accordingly with the shape of the focus portion of intravital cancer of patient etc.; And a kind of radiotherapy apparatus, focus portion irradiation proton line isoradial is carried out the treatment of focus portion.
Background technology
In the treatment of radiotherapy apparatus to the focus portion of cancer etc., ideal situation is that the normal structure of periphery is not subjected to irreclaimable influence, and only makes lethal dosage concentrate on focus portion ground irradiation lonizing radiation.Yet, the shape difference of each patient's focus portion usually.
Therefore, known in the past a kind of multi-diaphragm collimator possesses: a pair of impeller group is made of a plurality of impeller; A plurality of L font accessories are separately positioned on each impeller; With a plurality of motor, link respectively via feed screw and each L font accessory; By driving each motor respectively, can set the range of exposures (for example with reference to patent documentation 1) of lonizing radiation to each patient.
Patent documentation 1: Japanese kokai publication hei 7-204284 communique
As mentioned above, to focus portion irradiation lonizing radiation, wish to set as far as possible accurately the range of exposures of lonizing radiation for only.At this, in order to reproduce the profile of focus portion exactly by a plurality of impeller, the thickness of slab of preferred impeller is thin as much as possible.
But, in multi-diaphragm collimator in the past, because motor configuration mutually, so under the situation of the thickness of slab attenuation of wanting to make impeller with staggering, exist motor to interfere mutually and be difficult to dispose the problem of motor.
Summary of the invention
The object of the present invention is to provide a kind of multi-diaphragm collimator and the radiotherapy apparatus that can set the range of exposures of lonizing radiation accurately.
Multi-diaphragm collimator of the present invention is, sets the range of exposures of lonizing radiation accordingly with the shape of the intravital focus of patient portion, it is characterized in that possessing: the impeller group, to dispose a plurality of impeller along the mode of arranging with the orthogonal imaginary axis of the irradiation axis of lonizing radiation; And driver element, have a plurality of driving mechanism row that dispose a plurality of driving mechanisms in the mode of arranging along irradiation axis, this driving mechanism is, is connected one to one with impeller, and along driving corresponding impeller with the irradiation axis quadrature and with the orthogonal direction of above-mentioned imaginary axis.
In multi-diaphragm collimator of the present invention, driver element has a plurality of driving mechanism row, and the mode that this driving mechanism is listed as to arrange along irradiation axis disposes a plurality of driving mechanisms.Therefore, driving mechanism is arranged as mutually can not interfere, and therefore can tackle in the thin plateization of impeller.As a result, can set the range of exposures of lonizing radiation accurately.
And driver element is preferably, and disposes a plurality of driving mechanisms row and constitutes in the mode of arranging along the driving direction of impeller.Thus, owing to can improve the configuration density of the driving mechanism row in the driver element, therefore can realize the densification of multi-diaphragm collimator.
And driver element is preferably, and disposes a plurality of driving mechanisms row and constitutes in the mode of arranging along imaginary axis.Thus, owing to can further improve the configuration density of the driving mechanism row in the driver element, therefore can realize the further densification of multi-diaphragm collimator.
And, also possess: the 1st rotatable parts, can rotate along the driving direction of impeller, and at least 1 of a distolateral configuration of the impeller on the direction of irradiation axis; With the 2nd rotatable parts, can rotate along the driving direction of impeller, and at least 2 of another the distolateral configurations of the impeller on the direction of irradiation axis; Impeller is preferably by the 1st rotatable parts and the 2nd rotatable parts support.Thus, can support impeller reliably, and impeller can be driven on its driving direction swimmingly.
And, preferably at the thickness of slab of the impeller of the middle body that on the direction of imaginary axis, is positioned at the impeller group, thinner than thickness of slab at the impeller of the two side portions that on the direction of imaginary axis, is positioned at the impeller group.The thickness of slab of impeller that mainly is positioned at the middle body of impeller group on the direction of arranging by a plurality of impeller that constitute the impeller group decides the precision of the range of exposures of lonizing radiation, therefore, can further set the range of exposures of lonizing radiation thus accurately.
And preferred driver element is configured in the position than the radiation source of the more approaching irradiation lonizing radiation of impeller group.Thus, driver element can not hinder multi-diaphragm collimator near the patient.At this and since lonizing radiation have with the orthogonal direction of its irradiation axis on the character expanded, therefore, as described above, can set the range of exposures of lonizing radiation accurately near the patient by making multi-diaphragm collimator.
On the other hand, radiotherapy apparatus of the present invention possesses the radiation source and the multi-diaphragm collimator of irradiation lonizing radiation, this multi-diaphragm collimator is configured in from the direction of illumination of the lonizing radiation of radiation source irradiation and the range of exposures of lonizing radiation is set at reservation shape, this radiotherapy apparatus is characterised in that, multi-diaphragm collimator has: a pair of impeller group, along being arranged with a plurality of impeller with the orthogonal imaginary axis of the irradiation axis of lonizing radiation; And driver element, have a plurality of driving mechanism row that dispose a plurality of driving mechanisms in the mode of arranging along irradiation axis, this driving mechanism is, is connected one to one with impeller, and along driving corresponding impeller with the irradiation axis quadrature and with the orthogonal direction of above-mentioned imaginary axis.
In radiotherapy apparatus of the present invention, the driver element of multi-diaphragm collimator has a plurality of driving mechanism row that dispose a plurality of driving mechanisms in the mode of arranging along irradiation axis.Therefore, driving mechanism is arranged as mutually can not interfere, therefore can be corresponding to the thin plateization of impeller.As a result, can set the range of exposures of lonizing radiation accurately.
According to the present invention, can provide a kind of multi-diaphragm collimator and the radiotherapy apparatus that can set the range of exposures of lonizing radiation accurately.
Description of drawings
Fig. 1 is the axonometric chart of the radiotherapy apparatus of expression present embodiment.
Fig. 2 is the skeleton diagram of structure that is used to illustrate the radiotherapy apparatus of present embodiment.
Fig. 3 is the axonometric chart of expression multi-diaphragm collimator.
Fig. 4 is the axonometric chart of the part of expression multi-diaphragm collimator.
Fig. 5 is the side view that amplifies the expression impeller.
Fig. 6 is the sectional view of expression driving mechanism.
The specific embodiment
With reference to description of drawings preferred implementation of the present invention.
The structure of radiotherapy apparatus 100 at first, is described with reference to Fig. 1 and Fig. 2.As shown in Figure 1, radiotherapy apparatus 100 possesses: treatment table 102; Surround the rotary frame 104 of treatment table 102; Radiation exposure device 106; And cyclotron (particle accelerator) 108.
Scattering object 110 make thin lonizing radiation R with the orthogonal direction of the irradiation axis A of lonizing radiation R on amplify (with reference to Fig. 2), these lonizing radiation R is generated by cyclotron 108 and is sent to radiation exposure device 106 by not shown conveyer device.For example can use stereotype or the aluminium sheet of thickness of slab as scattering object 110 for number mm.Herein, in the present embodiment, lonizing radiation R comprises alpha ray, β ray, gamma-rays, molecular ray, atomic ray, neutron ray, electron ray, proton line, X ray, heavy particle line, ion line, heavy ion line etc., in the field of radiation cure, especially preferably use proton line, heavy particle line, X ray, neutron ray.
The shape of multi-diaphragm collimator 1 and the intravital focus F of portion of patient P is determined the range of exposures of lonizing radiation R accordingly.As shown in Figure 2, multi-diaphragm collimator 1 is configured in the direction of illumination (X-direction) that relies on lonizing radiation R than scattering object 110 in radiation exposure device 106.
Then, describe the structure of multi-diaphragm collimator 1 in detail with reference to Fig. 2～Fig. 6.As Fig. 2 and shown in Figure 3, multi-diaphragm collimator 1 possesses a pair of impeller group 10 and is configured in than a pair of driver element 12 of impeller group 10 by the position of the upstream side (as cyclotron 108 sides of radiation source) of lonizing radiation R.
A pair of impeller group 10 Y direction (with the X-axis quadrature and with the orthogonal direction of Z axle) go up arranged opposite.Impeller group 10 constitutes, to dispose a plurality of (in the present embodiment being 32) impeller 14A and a plurality of (in the present embodiment being 20) impeller 14B along the mode with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction) arrangement.Specifically, in the present embodiment, impeller group 10 constitutes, along with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction), arrange 10 impeller 14B, 32 impeller 14A and 10 impeller 14B in order.
As Fig. 4 and shown in Figure 5, at opposed a pair of side S on impeller 14A, the 14B, on its height H direction
1, S
2On, be formed with upwardly extending slot part 16 respectively in its length L side.At the side of impeller 14A, 14B S
1In the slot part 16 of side, engaging has 1 miniature bearing (the 1st rotatable parts) 18; At the side of impeller 14A, 14B S
2In the slot part 16 of side, 2 miniature bearings (the 2nd rotatable parts), 18 (with reference to Fig. 4) are arranged with the state engaging of on Y direction, leaving mutually.Therefore, impeller 14A, 14B are supported by 3 miniature bearings 18, and can slide on its length L direction.
Especially as among Fig. 5 in detail shown in, impeller 14A, 14B are opposed a pair of side S on its thickness of slab T direction
3, S
4Go up, at the middle body of its height H direction, have upwardly extending stage portion 20 in its length L side.And the interval G of adjacent impeller 14A, 14B is set to littler than the height D of stage portion 20.This is in order to prevent that lonizing radiation R from passing adjacent impeller 14A, the gap of 14B.In the present embodiment, the height D of stage portion 20 is set to about 1mm, and the interval G of adjacent impeller 14A, 14B is set to about 0.2mm.
Turn back to Fig. 3, a pair of driver element 12 Y direction (with the X-axis quadrature and with the orthogonal direction of Z axle) go up arranged opposite.Driver element 12 has a plurality of (in the present embodiment being 6) the 1st～the 6th driving mechanism row 22A
1～22A
6With a plurality of (in the present embodiment being 6) the 1st～the 6th driving mechanism row 22B
1～22B
6The the 1st～the 6th driving mechanism row 22A
1～22A
6And the 1st～the 6th driving mechanism row 22B
1～22B
6Be configured to, respectively along arranging with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction).And, the 1st～the 6th driving mechanism row 22A
1～22A
6And the 1st～the 6th driving mechanism row 22B
1～22B
6Be configured to, arrange along the length direction (Y direction) of impeller 14A, 14B respectively, with respect to impeller group 10, the 1～the 6th driving mechanism row 22B
1～22B
6Be positioned at than the 1st～the 6th driving mechanism row 22A
1～22A
6Position far away.
1st, the 2nd, the 5th, the 6th driving mechanism row 22A
1, 22A
2, 22A
5, 22A
6And the 1st, the 2nd, the 5th, the 6th driving mechanism row 22B
1, 22B
2, 22B
5, 22B
6Constitute, the mode of arranging with the irradiation axis A along lonizing radiation R disposes a plurality of (in the present embodiment being 4) driving mechanism 24.And, the 3rd, the 4th driving mechanism row 22A
3, 22A
4And the 3rd, the 4th driving mechanism row 22B
3, 22B
4Constitute, the mode of arranging with the irradiation axis A along lonizing radiation R disposes a plurality of (in the present embodiment being 5) driving mechanism 24.In addition, constitute each driving mechanism row 22A
1～22A
6, 22B
1～22B
6Driving mechanism 24 be fixed on the rib (not shown), this rib is arranged on the framework (not shown) of accommodating impeller group 10.
Ball-screw 26 comprises thread spindle 26a and nut body 26b.Thread spindle 26a can be installed on the basket 32 rotationally by pair of bearings 33.Nut body 26b and thread spindle 26a screw togather.On nut body 26b, be provided with outstanding laterally plate-shaped member 34 (with reference to Fig. 3, Fig. 4 and Fig. 6) from the seam 32b of basket 32 described later.In addition, in Fig. 3 and Fig. 4, omitted a part of plate-shaped member 34, connecting plate described later 38,42 and linked parts 40.
The axle of motor 28 links by an end that links parts (coupling) 36 and thread spindle 26a.Encoder 30 is installed on the motor 28, measures the anglec of rotation of motor 28.
The profile of basket 32 is rectangular shape, and ball-screw 26 is accommodated in its inside.On the sidewall 32a of basket 32, be formed with the seam 32b (with reference to Fig. 4) that extends along the length direction (Y direction) of basket 32.
And, as shown in Figure 4, constitute driving mechanism row 22B
1～22B
6Driving mechanism 24 and impeller 14A, 14B be connected one to one by linking parts 40 and connecting plate 42.An end that links parts 40 is connected with the plate-shaped member of giving prominence to from seam 32b 34, and the other end is connected with an end of connecting plate 42, and plate-shaped member 34 and connecting plate 42 are bonded.Linking parts 40 is to extend along Y direction linearity ground towards impeller 14A, 14B from its end to end.Linking parts 40 is rectangular thin plates, can process aluminium sheet and forms.In the present embodiment, the thickness of slab of binding parts 40 is set to about 3mm.
One end of connecting plate 42 is connected with the other end that links parts 40, and the other end is connected with impeller 14A, 14B.Connecting plate 42 is, the direction of illumination from its end to end along lonizing radiation R (X-direction) and extending downwards, and after bending section 42a bending, and towards impeller 14A, 14B and once more the direction of illumination (X-direction) along lonizing radiation R extends downwards.Connecting plate 42 is rectangular thin plates, can the processing stainless steel plate and form.In the present embodiment, the thickness of slab of connecting plate 42 is set to about 0.5mm.
In above-described present embodiment, in driving mechanism 24, rotatablely moving of motor 28 is converted to rectilinear motion by ball-screw 26, the nut body 26b that constitutes ball-screw 26 is connected by connecting plate 38 with impeller 14A, 14B, therefore, impeller 14A, 14B are driven by the bearing of trend (Y direction) along the thread spindle 26a that constitutes ball-screw 26.And, because driving mechanism 24 is connected one to one with impeller 14A, 14B, therefore, drives each impeller 14A, 14B respectively by each driving mechanism 24, can form the opening 44 (with reference to Fig. 2) that lonizing radiation R can pass through, and the position of opening 44 and shape are freely changed.Therefore, incide the lonizing radiation R of multi-diaphragm collimator 1, cover by opening 44 and by being present in opening 44 impeller 14A, 14B on every side, cut along profile corresponding to the shape of opening 44, therefore, by multi-diaphragm collimator 1, the range of exposures of lonizing radiation R is changed.
And in the present embodiment, driver element 12 has driving mechanism row 22A
1～22A
6And driving mechanism row 22B
1～22B
6, driving mechanism row 22A
1～22A
6And driving mechanism row 22B
1～22B
6Have a plurality of driving mechanisms 24 that dispose in the mode of arranging along the irradiation axis A of lonizing radiation R.Therefore, driving mechanism 24 is arranged as mutually can not interfere, and therefore can tackle in the thin plateization of impeller 14A, 14B.
And, in the present embodiment, driving mechanism row 22A
1～22A
6And driving mechanism row 22B
1～22B
6Be configured to, respectively along arranging with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction), and driving mechanism row 22A1～22A6 and driving mechanism row 22B
1～22B
6Be configured to arrange along the length direction (Y direction) of impeller 14A, 14B.Therefore, can improve driving mechanism row 22A in the driver element 12
1～22A
6And driving mechanism row 22B
1～22B
6Configuration density, therefore can realize the densification of multi-diaphragm collimator 1.
And in the present embodiment, driver element 12 is configured in than the upstream side (cyclotron 108 sides) of impeller group 10 by lonizing radiation R.Therefore, wanting multi-diaphragm collimator 1 near under patient's the situation, driver element 12 can not hinder multi-diaphragm collimator 1 approaching to patient P.As a result, can set the range of exposures of lonizing radiation R accurately.
And, in the present embodiment, at the side of impeller 14A, 14B S
1Slot part 16 in the engaging 1 miniature bearing 18 is arranged, at the side of impeller 14A, 14B S
2Slot part 16 in engaging 2 miniature bearings 18 are arranged.Therefore, impeller 14A, 14B are supported by 3 miniature bearings 18, and driving along with driving mechanism 24 couples of impeller 14A, 14B, miniature bearing 18 rotates along the driving direction (Y direction) of impeller 14A, 14B, therefore, impeller 14A, 14B are driven swimmingly on its driving direction (Y direction).
And, in the present embodiment, with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction) on be positioned at the thickness of slab T of impeller 14A of the middle body of impeller group 10, than with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction) on to be positioned at the thickness of slab T of impeller 14B of two end portions of impeller group 10 thin.Mainly by with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction) on be positioned at the middle body of impeller group 10 the thickness of slab T of impeller 14A decide the precision of the range of exposures of lonizing radiation R, therefore, can set the range of exposures of lonizing radiation R thus more accurately.
More than, describe the preferred implementation of present embodiment in detail, but the invention is not restricted to above-mentioned embodiment.For example, at the side of impeller 14A, 14B S
1Slot part 16 in the engaging 1 miniature bearing 18 is arranged, at the side of impeller 14A, 14B S
2Slot part 16 in engaging 2 miniature bearings 18 are arranged, but also can be at the side of impeller 14A, 14B S
1, S
2At least 1 miniature bearing 18 of side configuration, and at the side of impeller 14A, 14B S
1, S
2At least 2 miniature bearings 18 of the opposing party configuration.
And, used miniature bearing 18 in the present embodiment, as long as but can go up at the driving direction (Y direction) of impeller 14A, 14B and rotate, various rotatable parts can be used.
And, in the present embodiment, make with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction) on be positioned at the thickness of slab T of impeller 14A of the middle body of impeller group 10, than with the orthogonal direction of the irradiation axis A of lonizing radiation R (Z-direction) on to be positioned at the thickness of slab T of impeller 14B of two end portions of impeller group 10 thin, also can be all identical but constitute the thickness of slab T of impeller 14A, the 14B of impeller group 10.
And in the present embodiment, driver element 12 is configured in than impeller group 10 upstream side (cyclotron 108 sides) by lonizing radiation R, but driver element 12 also can be disposed on the identical position of X-direction and impeller group 10 (near the impeller group).
Claims (7)
1. multi-diaphragm collimator is set the range of exposures of lonizing radiation accordingly with the shape of the intravital focus of patient portion, it is characterized in that possessing:
The impeller group is to dispose a plurality of impeller along the mode with the orthogonal imaginary axis arrangement of the irradiation axis of lonizing radiation; With
Driver element, have a plurality of driving mechanism row that dispose a plurality of driving mechanisms in the mode of arranging along above-mentioned irradiation axis, this driving mechanism is, is connected one to one with above-mentioned impeller, and along driving corresponding impeller with above-mentioned irradiation axis quadrature and with the orthogonal direction of above-mentioned imaginary axis.
2. multi-diaphragm collimator as claimed in claim 1 is characterized in that,
Above-mentioned driver element constitutes, and disposes a plurality of above-mentioned driving mechanism row in the mode of arranging along the driving direction of above-mentioned impeller.
3. multi-diaphragm collimator as claimed in claim 2 is characterized in that,
Above-mentioned driver element constitutes, and disposes a plurality of above-mentioned driving mechanism row in the mode of arranging along above-mentioned imaginary axis.
4. as each described multi-diaphragm collimator of claim 1～3, it is characterized in that,
Also possess:
The 1st rotatable parts can rotate along the driving direction of above-mentioned impeller, and at least 1 of a distolateral configuration of the above-mentioned impeller on the direction of above-mentioned irradiation axis; With
The 2nd rotatable parts can rotate along the driving direction of above-mentioned impeller, and at least 2 of another the distolateral configurations of the above-mentioned impeller on the direction of above-mentioned irradiation axis,
Above-mentioned impeller is by above-mentioned the 1st rotatable parts and above-mentioned the 2nd rotatable parts support.
5. as each described multi-diaphragm collimator of claim 1～4, it is characterized in that,
At the thickness of slab of the impeller of the middle body that on the direction of above-mentioned imaginary axis, is positioned at above-mentioned impeller group, thinner than thickness of slab at the impeller of the two side portions that on the direction of above-mentioned imaginary axis, is positioned at above-mentioned impeller group.
6. as each described multi-diaphragm collimator of claim 1～5, it is characterized in that,
Above-mentioned driver element is configured in than above-mentioned impeller winding and is bordering on the position of the radiation source that shines lonizing radiation.
7. a radiotherapy apparatus possesses: the radiation source of irradiation lonizing radiation; And multi-diaphragm collimator, be configured in from the direction of illumination of the lonizing radiation of above-mentioned radiation source irradiation, the range of exposures of lonizing radiation is set at reservation shape, this radiotherapy apparatus is characterised in that,
Above-mentioned multi-diaphragm collimator has:
The impeller group is along being arranged with a plurality of impeller with the orthogonal imaginary axis of the irradiation axis of lonizing radiation; With
Driver element, have a plurality of driving mechanism row that dispose a plurality of driving mechanisms in the mode of arranging along above-mentioned irradiation axis, this driving mechanism is, is connected one to one with above-mentioned impeller, and along driving corresponding impeller with above-mentioned irradiation axis quadrature and with the orthogonal direction of above-mentioned imaginary axis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101852395A CN101757737B (en) | 2008-12-24 | 2008-12-24 | Multi-leaf collimator and radiotherapy device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101852395A CN101757737B (en) | 2008-12-24 | 2008-12-24 | Multi-leaf collimator and radiotherapy device |
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| Publication Number | Publication Date |
|---|---|
| CN101757737A true CN101757737A (en) | 2010-06-30 |
| CN101757737B CN101757737B (en) | 2012-11-14 |
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| CN2008101852395A Active CN101757737B (en) | 2008-12-24 | 2008-12-24 | Multi-leaf collimator and radiotherapy device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103272338A (en) * | 2013-05-20 | 2013-09-04 | 清华大学 | Radiotherapy equipment and radiotherapy system with radiotherapy equipment |
| CN104053476A (en) * | 2012-03-30 | 2014-09-17 | 住友重机械工业株式会社 | Collimator For Neutron Capture Therapy And Neutron Capture Therapy Apparatus |
| CN104771838A (en) * | 2015-04-09 | 2015-07-15 | 清华大学 | Multi-leaf collimator for tumor radiotherapy and tumor radiotherapy apparatus |
| CN105407965A (en) * | 2013-10-04 | 2016-03-16 | 三菱重工业株式会社 | Multileaf collimator, and radiation therapy apparatus and radiation therapy system using same |
| CN111388881A (en) * | 2020-03-23 | 2020-07-10 | 上海联影医疗科技有限公司 | Control method and system of beam limiting device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2514851Y (en) * | 2001-10-19 | 2002-10-09 | 深圳市一体智能技术有限公司 | Composite moving multivane collimator |
| JP4184839B2 (en) * | 2003-03-13 | 2008-11-19 | 株式会社東芝 | Multi-segment diaphragm device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053476A (en) * | 2012-03-30 | 2014-09-17 | 住友重机械工业株式会社 | Collimator For Neutron Capture Therapy And Neutron Capture Therapy Apparatus |
| CN104053476B (en) * | 2012-03-30 | 2015-11-25 | 住友重机械工业株式会社 | Neutron capture therapy collimator and neutron capture therapy device |
| CN103272338A (en) * | 2013-05-20 | 2013-09-04 | 清华大学 | Radiotherapy equipment and radiotherapy system with radiotherapy equipment |
| CN103272338B (en) * | 2013-05-20 | 2016-02-24 | 清华大学 | Radiotherapy equipment and there is the radiotherapy system of this radiotherapy equipment |
| CN105407965A (en) * | 2013-10-04 | 2016-03-16 | 三菱重工业株式会社 | Multileaf collimator, and radiation therapy apparatus and radiation therapy system using same |
| CN105407965B (en) * | 2013-10-04 | 2018-08-24 | 株式会社日立制作所 | Multi-leaf optical grating and the radiotherapy apparatus using the multi-leaf optical grating, radiation treatment systems |
| CN104771838A (en) * | 2015-04-09 | 2015-07-15 | 清华大学 | Multi-leaf collimator for tumor radiotherapy and tumor radiotherapy apparatus |
| CN111388881A (en) * | 2020-03-23 | 2020-07-10 | 上海联影医疗科技有限公司 | Control method and system of beam limiting device |
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| Publication number | Publication date |
|---|---|
| CN101757737B (en) | 2012-11-14 |
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