JPH039767A - Multileaf collimator - Google Patents
Multileaf collimatorInfo
- Publication number
- JPH039767A JPH039767A JP14409089A JP14409089A JPH039767A JP H039767 A JPH039767 A JP H039767A JP 14409089 A JP14409089 A JP 14409089A JP 14409089 A JP14409089 A JP 14409089A JP H039767 A JPH039767 A JP H039767A
- Authority
- JP
- Japan
- Prior art keywords
- leaves
- collimator
- leaf
- collimators
- pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005855 radiation Effects 0.000 abstract 2
- 206010028980 Neoplasm Diseases 0.000 description 3
- 201000011510 cancer Diseases 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Landscapes
- Radiation-Therapy Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、マルチリーフ・コリメータに関し、もう少
し詳しくいうと、荷電粒子線によりがん細胞を治療する
ためのマルチリーフ・コリメータに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multi-leaf collimator, and more specifically, to a multi-leaf collimator for treating cancer cells with a charged particle beam.
第５図は、例えば本出願人の先の出ＷＢ（特開昭６２−
２８８４９５号）で示した従来のマルチリーフ・コリメ
ータであり、鉛、鉄などで作られたいる四角柱状の複数
個のリーフ（１）でなる１対のリーフ群（ｌｌａ）と（
ｌｌｂ）が、互いに同一平面内に対向して配置され、コ
リメータ（１１）を形成している。荷゛電粒子のビーム
（２）はコリメータ（１１）の中央部を通過する。FIG. 5 shows, for example, the applicant's earlier published WB
288495), which consists of a pair of leaf groups (lla) consisting of a plurality of quadrangular prism-shaped leaves (1) made of lead, iron, etc.
llb) are arranged opposite to each other in the same plane and form a collimator (11). The beam (2) of charged particles passes through the central part of the collimator (11).
次に動作について説明する。図のように、複数個のリー
フ（１）を組み合わせて、ビーム（２）の形状を変えて
、がんなどの患部の形状に合わせることができる。リー
フ（１）相互間は、ビーム（２）が患部以外の場所に漏
れないよう密着していなければならない、しかし、反面
、いろいろな形状の照射野を作るために、リーフ（１）
相互間はスムーズに滑ることが要求されることがら、リ
ーフ（１）間の摩擦が問題になる。また、１回の照射中
に何回かの照射野を作る場合にはできるだけ早くリーフ
（１）を動かすことも必要である。Next, the operation will be explained. As shown in the figure, by combining a plurality of leaves (1), the shape of the beam (2) can be changed to match the shape of the affected area, such as cancer. The leaves (1) must be in close contact with each other to prevent the beam (2) from leaking to areas other than the affected area.However, on the other hand, in order to create irradiation fields of various shapes, the leaves (1)
Since smooth sliding between the leaves is required, friction between the leaves (1) becomes a problem. Furthermore, when creating several irradiation fields during one irradiation, it is also necessary to move the leaf (1) as quickly as possible.
従来のマルチリーフ・コリメータは以上のように構成さ
れているので、リーフとリーフの閉は密着していなけれ
ばならない反面、摩擦によってスムーズに照射野を作れ
ないという問題があった。Conventional multi-leaf collimators are constructed as described above, and while the leaves must be in close contact with each other, there is a problem in that the irradiation field cannot be created smoothly due to friction.
この発明は、上記のような問題点を解消するためになさ
れたもので、リーフをスムーズに、かつ、スピーデイに
動かすことができるマルチリーフ・コリメータを得るこ
とを目的とする。This invention was made to solve the above-mentioned problems, and aims to provide a multi-leaf collimator that can move leaves smoothly and quickly.
この発明に係るマルチリーフ・コリメータは、複数個の
リーフでなる１対のリーフ群が同じ平面内にあるコリメ
ータを複数段設け、リーフ群間に距離を置いて配置した
ものである。The multi-leaf collimator according to the present invention includes a plurality of stages of collimators in which a pair of leaf groups each consisting of a plurality of leaves lie within the same plane, and are arranged with a distance between the leaf groups.
この発明においては、コリメータを２段にすることによ
り、リーフ間の摩擦がなくなる。In this invention, friction between the leaves is eliminated by providing a two-stage collimator.
第１図はこの発明の一実施例を示し、第５図で示したと
同様の第１のコリメータ（１１）に対して、コリメータ
（１１）と１隙をおいて第２のコリメータ（１３）が重
ねて配置されている。第２のコリメータ（１３）は、複
数個のリーフ（３）からなる１対のリーフ群（１３ａ）
、 （１３ｂ）からなっており、リーフ（３）はリー
フ（１）に対して幅の半分だけ重なって配置されている
。FIG. 1 shows an embodiment of the present invention, in which a second collimator (13) is connected to a first collimator (11) similar to that shown in FIG. They are arranged one on top of the other. The second collimator (13) includes a pair of leaf groups (13a) consisting of a plurality of leaves (3).
, (13b), and the leaf (3) is arranged to overlap the leaf (1) by half the width.
以上の構成により、リーフ（１） とリーフ（３）が互
いに半分だけ重なりあっており、これらのリーフ（１）
、 （３）を制御して組み合わせることにより、平面で
の照射野は従来例と同じものが得られる。With the above configuration, Leaf (1) and Leaf (3) overlap each other by half, and these Leaf (1)
By controlling and combining , (3), the same planar irradiation field as the conventional example can be obtained.
また、リーフ（１）、 （３）の幅は従来装置の２倍で
良く、制御するリーフの数も、変わらない６第２区は他
の実施例であり、第１のコリメータ（１１）のリーフ（
１）と第２のコリメータ（１３）のリーフ（３）が互い
に直角に交差して配置されており、上記と同様の効果が
ある。In addition, the width of the leaves (1) and (3) can be twice that of the conventional device, and the number of leaves to be controlled remains the same.6 The second section is another example, and the first collimator (11) Leaf (
1) and the leaves (3) of the second collimator (13) are arranged to intersect each other at right angles, and have the same effect as above.
第３図はさらに他の実施例を示し、第１のコリメータ（
１１）と第２のコリメータ（１３）が共通の軸（４）を
中心に任意角度、回転可能であり、上記と同様の効果が
あり、照射野の形をなめらかにすることができる。FIG. 3 shows yet another embodiment, in which the first collimator (
11) and the second collimator (13) can be rotated at any angle around the common axis (4), which has the same effect as above and can smooth the shape of the irradiation field.
第４図はこの発明のマルチリーフ・コリメータを使った
荷電粒子線がん治療装置を示し、ビーム（２）は走査電
磁石（５）のそれぞれに９０°位相のずれた交流電流を
印加することにより、平坦な等線量分布を゛もつように
なる。このビーム（２）はレンジシフタ（６〉により、
エネルギーが変えられ、第１、第２のコリメータ（１１
）、 （１３）により、ビーム（２）に垂直方向の平面
内で、所望の照射野を形成して、治療台（７）上の患者
（８）に照射される。Figure 4 shows a charged particle beam cancer treatment device using the multi-leaf collimator of the present invention, in which the beam (2) is generated by applying alternating currents with a phase shift of 90° to each of the scanning electromagnets (5). , it will have a flat isodose distribution. This beam (2) is controlled by the range shifter (6>).
The energy is changed and the first and second collimators (11
), (13), a desired irradiation field is formed in a plane perpendicular to the beam (2), and the patient (8) on the treatment table (7) is irradiated.
なお、上記実施例では、２段のコリメータでなるものに
ついて述べたが、３段以上にしても同様の効果がある。In the above embodiment, a two-stage collimator was described, but the same effect can be obtained even if there are three or more stages.
以上のように、この発明によれば、複数個のリーフでな
るコリメータを多段にしたので、リーフ間を拡げること
ができ、リーフをスムーズに、スピーデイに動かすこと
ができ、迅速に任意の照射野が得られる効果がある。As described above, according to the present invention, since the collimator consisting of a plurality of leaves is multistage, the distance between the leaves can be expanded, the leaves can be moved smoothly and quickly, and the desired irradiation field can be quickly set. There is an effect that can be obtained.
第１図（ａ）、（ｂ）はこの発明の一実施例の側断面図
と平面図、第２図（ａ）、（ｂ）および第３図（ａ）。
（ｂ）はそれぞれ他の実施例の側断面図と平面図、第４
図はこの発明のものの使用状態を示す概略側面図、第５
図（ａ）、（ｂ）は従来のマルチリーフ・コリメータの
側断面図と平面図である。
（１） 、 （３） ・・リーフ、（２）・・ビーム
、（ｌｌａ）、（Ｉｌｂ）、（１３ａ）、（１３ｂ）・
・リーフ群、（１１）、 （１３）−第１．第２のコリ
メータ。
なお、各図中、同一符号は同−又は相当部分を示す。FIGS. 1(a) and (b) are a side sectional view and a plan view of an embodiment of the present invention, FIGS. 2(a) and (b), and FIG. 3(a). (b) is a side sectional view and a plan view of another embodiment, and the fourth
The figure is a schematic side view showing the state of use of this invention.
Figures (a) and (b) are a side sectional view and a plan view of a conventional multileaf collimator. (1), (3)...leaf, (2)...beam, (lla), (Ilb), (13a), (13b)...
- Leaf group, (11), (13) - 1st. Second collimator. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
隔をおいて対向配置されてビームに垂直な方向の前記ビ
ームの照射野を任意に制限するコリメータが、互いに間
隙をおいて複数段配置されているマルチリーフ・コリメ
ータ。A pair of leaf groups consisting of a plurality of leaves are disposed facing each other at intervals within the same plane, and collimators arbitrarily restricting the irradiation field of the beam in a direction perpendicular to the beam are arranged in multiple stages with gaps between each other. Multi-leaf collimator in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1144090A JPH0767491B2 (en) | 1989-06-08 | 1989-06-08 | Multi-leaf collimator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1144090A JPH0767491B2 (en) | 1989-06-08 | 1989-06-08 | Multi-leaf collimator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH039767A true JPH039767A (en) | 1991-01-17 |
| JPH0767491B2 JPH0767491B2 (en) | 1995-07-26 |
Family
ID=15353988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1144090A Expired - Lifetime JPH0767491B2 (en) | 1989-06-08 | 1989-06-08 | Multi-leaf collimator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0767491B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751532A1 (en) * | 1995-06-30 | 1997-01-02 | Siemens Medical Systems, Inc. | A multiple layer multileaf collimator |
| JP2002210026A (en) * | 2001-01-19 | 2002-07-30 | Toshiba Corp | Radiotherapy equipment and beam limiting device for setting irradiation field of radiation |
| GB2403884A (en) * | 2003-07-08 | 2005-01-12 | Elekta Ab | Multi-leaf collimator comprising three collimator sets arranged at acute angles |
| DE102011081038A1 (en) * | 2011-08-16 | 2013-02-21 | Siemens Aktiengesellschaft | Multi-lamellae collimator for use in irradiation device for generating irradiation field, particularly for removing tissue and treating tumor of patient by radiotherapy, has multiple lamellae for manipulation of medical irradiation field |
| US8637841B2 (en) | 2010-08-23 | 2014-01-28 | Varian Medical Systems, Inc. | Multi level multileaf collimators |
| KR20160103884A (en) * | 2015-02-25 | 2016-09-02 | 동명대학교산학협력단 | A multifunctional compass with functions of Angle and length measurement |
| JP2018099247A (en) * | 2016-12-20 | 2018-06-28 | キヤノンメディカルシステムズ株式会社 | Radiotherapy device |
| US10071263B1 (en) | 2014-03-25 | 2018-09-11 | Varian Medical Systems, Inc. | Pivoting multileaf collimator and method for large field coverage |
| CN111053977A (en) * | 2019-12-20 | 2020-04-24 | 上海联影医疗科技有限公司 | Multi-leaf collimator and radiotherapy device |
| US11000706B2 (en) | 2016-12-13 | 2021-05-11 | Viewray Technologies, Inc. | Radiation therapy systems and methods |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008206822A (en) * | 2007-02-27 | 2008-09-11 | Toshiba Corp | Radiation therapy apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01206300A (en) * | 1988-02-12 | 1989-08-18 | Hitachi Medical Corp | Collimator for radiation irradiation device |
-
1989
- 1989-06-08 JP JP1144090A patent/JPH0767491B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01206300A (en) * | 1988-02-12 | 1989-08-18 | Hitachi Medical Corp | Collimator for radiation irradiation device |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751532A1 (en) * | 1995-06-30 | 1997-01-02 | Siemens Medical Systems, Inc. | A multiple layer multileaf collimator |
| JP2002210026A (en) * | 2001-01-19 | 2002-07-30 | Toshiba Corp | Radiotherapy equipment and beam limiting device for setting irradiation field of radiation |
| GB2403884A (en) * | 2003-07-08 | 2005-01-12 | Elekta Ab | Multi-leaf collimator comprising three collimator sets arranged at acute angles |
| GB2403884B (en) * | 2003-07-08 | 2006-03-01 | Elekta Ab | Multi-leaf collimator |
| US7095823B2 (en) | 2003-07-08 | 2006-08-22 | Elekta Ab (Publ) | Multi-leaf collimator |
| US8637841B2 (en) | 2010-08-23 | 2014-01-28 | Varian Medical Systems, Inc. | Multi level multileaf collimators |
| US9082520B2 (en) | 2010-08-23 | 2015-07-14 | Varian Medical Systems, Inc. | Multi level multileaf collimators |
| DE102011081038A1 (en) * | 2011-08-16 | 2013-02-21 | Siemens Aktiengesellschaft | Multi-lamellae collimator for use in irradiation device for generating irradiation field, particularly for removing tissue and treating tumor of patient by radiotherapy, has multiple lamellae for manipulation of medical irradiation field |
| DE102011081038B4 (en) * | 2011-08-16 | 2015-06-18 | Siemens Aktiengesellschaft | multileaf collimator |
| US10071263B1 (en) | 2014-03-25 | 2018-09-11 | Varian Medical Systems, Inc. | Pivoting multileaf collimator and method for large field coverage |
| KR20160103884A (en) * | 2015-02-25 | 2016-09-02 | 동명대학교산학협력단 | A multifunctional compass with functions of Angle and length measurement |
| US11000706B2 (en) | 2016-12-13 | 2021-05-11 | Viewray Technologies, Inc. | Radiation therapy systems and methods |
| US11931602B2 (en) | 2016-12-13 | 2024-03-19 | Viewray Technologies, Inc. | Radiation therapy systems and methods |
| JP2018099247A (en) * | 2016-12-20 | 2018-06-28 | キヤノンメディカルシステムズ株式会社 | Radiotherapy device |
| CN111053977A (en) * | 2019-12-20 | 2020-04-24 | 上海联影医疗科技有限公司 | Multi-leaf collimator and radiotherapy device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0767491B2 (en) | 1995-07-26 |
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