CN101757737B - Multi-leaf collimator and radiotherapy device - Google Patents
Multi-leaf collimator and radiotherapy device Download PDFInfo
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- CN101757737B CN101757737B CN2008101852395A CN200810185239A CN101757737B CN 101757737 B CN101757737 B CN 101757737B CN 2008101852395 A CN2008101852395 A CN 2008101852395A CN 200810185239 A CN200810185239 A CN 200810185239A CN 101757737 B CN101757737 B CN 101757737B
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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 does not receive irreclaimable influence, and only makes lethal dosage concentrate on focus portion ground irradiation lonizing radiation.Yet the shape of each patient's focus portion is different usually.
Therefore, known in the past a kind of multi-diaphragm collimator possesses: a pair of impeller group is made up 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; Through 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 stated, to focus portion irradiation lonizing radiation, hope to set as far as possible accurately the range of exposures of lonizing radiation for only.At this, in order to come to reproduce exactly the profile of focus portion through 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 each other, so under the situation of the thickness of slab attenuation of wanting to make impeller with staggering, exist motor to interfere each other 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 does, 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 with the mode of arranging along irradiation axis; This driving mechanism does, 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; 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 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.
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 each other 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, can support impeller reliably, and can impeller be driven on its driving direction swimmingly.
And driver element is preferably, and disposes a plurality of driving mechanisms row and constitutes with 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 with 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, 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 is positioned at the middle body of impeller group on the direction of mainly arranging through 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 above-mentioned, can set the range of exposures of lonizing radiation accurately near the patient through 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 with the mode of arranging along irradiation axis; This driving mechanism does, 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; 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 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.
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 with the mode of arranging along irradiation axis.Therefore, driving mechanism is arranged as each other 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, a kind of multi-diaphragm collimator and the radiotherapy apparatus that can set the range of exposures of lonizing radiation accurately can be provided.
Description of drawings
Fig. 1 is the axonometric chart of the radiotherapy apparatus of this embodiment of expression.
Fig. 2 is the skeleton diagram of structure that is used to explain the radiotherapy apparatus of this 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 through not shown conveyer device.For example can use stereotype or the aluminium sheet of thickness of slab as scattering object 110 for number mm.Here, in this embodiment, lonizing radiation R comprises alpha ray, β ray, γ
Ray, 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 confirmed 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, specify the structure of multi-diaphragm collimator 1 with reference to Fig. 2～Fig. 6.Like 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 X axle quadrature and with the orthogonal direction of Z axle) go up arranged opposite.Impeller group 10 constitutes, to dispose a plurality of (in this embodiment being 32) impeller 14A and a plurality of (in this 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 this 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.
Like Fig. 4 and shown in Figure 5, last at impeller 14A, 14B, on its height H direction opposed a pair of side S
1, S
2On, be formed with upwardly extending slot part 16 respectively in its length L side.The S in the side of impeller 14A, 14B
1In the slot part 16 of side, engaging has 1 miniature bearing (the 1st rotatable parts) 18; The S in the side of impeller 14A, 14B
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 each other.Therefore, impeller 14A, 14B are supported by 3 miniature bearings 18, and can on its length L direction, slide.
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 adjacent impeller 14A, the interval G of 14B are 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 this embodiment, the height D of stage portion 20 is set to about 1mm, and adjacent impeller 14A, the interval G of 14B are set to about 0.2mm.
Turn back to Fig. 3, a pair of driver element 12 Y direction (with X axle quadrature and with the orthogonal direction of Z axle) go up arranged opposite.Driver element 12 has a plurality of (in this embodiment being 6) the 1st～the 6th driving mechanism row 22A
1～22A
6With a plurality of (in this 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 this 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 this 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 through pair of bearings 33 rotationally.Nut body 26b and thread spindle 26a screw togather.Be provided with on the nut body 26b from after the outstanding laterally plate-shaped member 34 (with reference to Fig. 3, Fig. 4 and Fig. 6) of seam 32b of the basket 32 stated.In addition, in Fig. 3 and Fig. 4, omitted a part of plate-shaped member 34, after the connecting plate 38,42 stated and link parts 40.
The axle of motor 28 links through 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 through 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 is bonded with connecting plate 42.Linking parts 40 does, extends 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 this embodiment, the thickness of slab that links 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 does, 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 this embodiment, the thickness of slab of connecting plate 42 is set to about 0.5mm.
In above-described embodiment; In driving mechanism 24; Rotatablely moving of motor 28 converts rectilinear motion into through ball-screw 26; The nut body 26b that constitutes ball-screw 26 is connected through connecting plate 38 with impeller 14A, 14B, and 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 with impeller 14A, 14B one to one, therefore, drives each impeller 14A, 14B respectively through 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 through opening 44 and by the impeller 14A, the 14B that are present in around the opening 44, cut along profile, therefore corresponding to the shape of opening 44; Through multi-diaphragm collimator 1, the range of exposures of lonizing radiation R is changed.
And in this 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 with the mode of arranging along the irradiation axis A of lonizing radiation R.Therefore, driving mechanism 24 is arranged as each other can not interfere, and therefore can tackle in the thin plateization of impeller 14A, 14B.
And, in this 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 22A
1～22A
6And 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 this embodiment, driver element 12 is configured in the upstream side (cyclotron 108 sides) that depends on lonizing radiation R than impeller group 10.Therefore, under wanting the situation of multi-diaphragm collimator 1 near the patient, 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 this embodiment, the S in the side of impeller 14A, 14B
1Slot part 16 in engaging 1 miniature bearing 18, the S in the side of impeller 14A, 14B arranged
2 Slot 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 24 couples of impeller 14A of driving mechanism, 14B; Miniature bearing 18 rotates along the driving direction (Y direction) of impeller 14A, 14B, therefore, impeller 14A, 14B is driven swimmingly on its driving direction (Y direction).
And; In this 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 through 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, specify the preferred implementation of this embodiment, but the invention is not restricted to above-mentioned embodiment.For example, the S in the side of impeller 14A, 14B
1Slot part 16 in engaging 1 miniature bearing 18, the S in the side of impeller 14A, 14B arranged
2 Slot part 16 in engaging 2 miniature bearings 18 are arranged, but also can be in the side of impeller 14A, 14B S
1, S
2At least 1 miniature bearing 18 of side configuration, and in the side of impeller 14A, 14B S
1, S
2At least 2 miniature bearings 18 of the opposing party configuration.
And, in this embodiment, used miniature bearing 18, 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 this 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 this embodiment, driver element 12 is configured in the upstream side (cyclotron 108 sides) that depends on lonizing radiation R than impeller group 10, 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;
Driver element; Have a plurality of driving mechanism row that dispose a plurality of driving mechanisms with the mode of arranging along above-mentioned irradiation axis; This driving mechanism does, 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;
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; And
The 2nd rotatable parts can rotate along the driving direction of above-mentioned impeller, and at least 2 of another 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.
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 with 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 with the mode of arranging along above-mentioned imaginary axis.
4. like each described multi-diaphragm collimator of claim 1～3, 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.
5. like each described multi-diaphragm collimator of claim 1～3, 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.
6. multi-diaphragm collimator as claimed in claim 4 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;
Driver element; Have a plurality of driving mechanism row that dispose a plurality of driving mechanisms with the mode of arranging along above-mentioned irradiation axis; This driving mechanism does, 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;
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; And
The 2nd rotatable parts can rotate along the driving direction of above-mentioned impeller, and at least 2 of another 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.
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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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| CN101757737A CN101757737A (en) | 2010-06-30 |
| CN101757737B true CN101757737B (en) | 2012-11-14 |
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| JP5630666B2 (en) * | 2012-03-30 | 2014-11-26 | 住友重機械工業株式会社 | Neutron capture therapy collimator and neutron capture therapy device |
| CN103272338B (en) * | 2013-05-20 | 2016-02-24 | 清华大学 | Radiotherapy equipment and there is the radiotherapy system of this radiotherapy equipment |
| US20160206899A1 (en) * | 2013-10-04 | 2016-07-21 | Mitsubishi Heavy Industries, Ltd. | Multileaf collimator, and radiation therapy apparatus and radiation therapy system using same |
| CN104771838B (en) * | 2015-04-09 | 2018-02-09 | 清华大学 | Multi-diaphragm collimator and tumour radiotherapy instrument for tumour radiotherapy |
| CN111388881B (en) * | 2020-03-23 | 2022-01-28 | 上海联影医疗科技股份有限公司 | Control method and system of beam limiting device |
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| 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 |
| CN1530151A (en) * | 2003-03-13 | 2004-09-22 | ��ʽ���綫֥ | Multiblade collimator |
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Patent Citations (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 |
| CN1530151A (en) * | 2003-03-13 | 2004-09-22 | ��ʽ���綫֥ | Multiblade collimator |
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