JP2017127434A - Particle beam medical treatment apparatus - Google Patents

Particle beam medical treatment apparatus Download PDF

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JP2017127434A
JP2017127434A JP2016008179A JP2016008179A JP2017127434A JP 2017127434 A JP2017127434 A JP 2017127434A JP 2016008179 A JP2016008179 A JP 2016008179A JP 2016008179 A JP2016008179 A JP 2016008179A JP 2017127434 A JP2017127434 A JP 2017127434A
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particle beam
cable
main body
cable spool
beam therapy
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JP6586020B2 (en
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鉄平 受川
Teppei Ukegawa
鉄平 受川
洋 石山
Hiroshi Ishiyama
洋 石山
健太郎 松井
Kentaro Matsui
健太郎 松井
裕司 瀧口
Yuji Takiguchi
裕司 瀧口
小林　英夫
Hideo Kobayashi
英夫 小林
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Toshiba Corp
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Abstract

PROBLEM TO BE SOLVED: To attain reduction in the size and weight of a particle beam medical treatment apparatus including a rotary gantry.SOLUTION: The apparatus comprises: a body barrel 4 of a rotary gantry 18; an electric magnet 5 provided at the body barrel 4 to secure the locus of particle beams; a cable 13 for supplying power and signals to the electric magnet 5; and a cable spool 9 for reeling the cable 13. The cable spool 9 is supported with a support frame 14 independently from the body barrel 4.SELECTED DRAWING: Figure 1

Description

本発明の実施形態は、粒子線治療に用いられる粒子線治療装置に関するものである。 Embodiments of the present invention relate to a particle beam therapy apparatus used for particle beam therapy.

従来から、アイソセンタ(照射目標中心)を設定して、放射線を患者の癌などの患部に照射して治療する放射線治療装置が知られている。特に現在では、陽子線や重粒子線などの加速粒子線を用いる治療方法が注目されている。 2. Description of the Related Art Conventionally, there is known a radiotherapy apparatus that sets an isocenter (irradiation target center) and irradiates a diseased part such as cancer of a patient and treats it. In particular, currently, a therapeutic method using an accelerated particle beam such as a proton beam or a heavy particle beam is attracting attention.

このような粒子線治療装置では、加速粒子線を人体の癌細胞などに適切かつ正確に照射することが重要である。癌などの腫瘍は様々な大きさと形状を持ち、患者体内における深さも異なるので、重粒子線を癌などの腫瘍に照射する治療では、周辺の正常組織が影響を受けないよう、腫瘍部分にのみ集中照射することが理想である。これを実現するためには加速粒子線照射方向の自由度を上げる必要があり、回転自在な放射線照射部を有する回転ガントリーと呼ばれる粒子線治療装置が知られている。この回転ガントリーでは放射線照射部が患者の周りを回転するので、任意の方向から患部に加速粒子線を照射することができる。 In such a particle beam therapy apparatus, it is important to appropriately and accurately irradiate the human body cancer cells with the accelerated particle beam. Tumors such as cancer have various sizes and shapes, and the depth within the patient's body is different, so that treatment with irradiation of heavy particle beams to tumors such as cancer only affects the tumor area so that surrounding normal tissues are not affected. Ideally, focused irradiation is used. In order to realize this, it is necessary to increase the degree of freedom in the accelerated particle beam irradiation direction, and a particle beam therapy device called a rotating gantry having a rotatable radiation irradiation unit is known. In this rotating gantry, the radiation irradiation part rotates around the patient, so that the affected part can be irradiated with the accelerated particle beam from any direction.

図８に粒子線治療装置の概略構成図を示す。粒子線治療装置２０は、粒子ビーム発生装置１９から加速粒子線発生装置１６を介して発生加速された粒子線が粒子線輸送系１７で１つ以上の回転ガントリー１８に導かれるように構成されている。 FIG. 8 shows a schematic configuration diagram of the particle beam therapy system. The particle beam therapy apparatus 20 is configured such that the particle beam generated and accelerated from the particle beam generation apparatus 19 via the acceleration particle beam generation apparatus 16 is guided to one or more rotating gantry 18 by the particle beam transport system 17. Yes.

特開２００４−３５８２３７号公報JP 2004-358237 A 特開平１０−３３００３７号公報JP 10-330037 A

上述した回転ガントリーでは、加速粒子線軌道に制約があり、本体胴が電磁石の規模に合わせて大型構造物となっていた。このため、本体胴を分割構造としても輸送が困難であるという課題があった。このため輸送を鑑み、回転ガントリー及び粒子線治療装置の小型化および軽量化を図る必要があった。 In the rotating gantry described above, the acceleration particle beam trajectory is limited, and the main body cylinder is a large structure in accordance with the scale of the electromagnet. Therefore, there is a problem that transportation is difficult even if the main body cylinder is divided. For this reason, in view of transportation, it has been necessary to reduce the size and weight of the rotating gantry and the particle beam therapy system.

また、前記回転ガントリーでは、本体胴の剛性が充分でないと電磁石搭載部の変位が大きくなり、粒子線照射精度が損なわれ、加速粒子線を患部に的確に照射できなくなるという課題があった。 Further, in the rotating gantry, there is a problem that if the rigidity of the main body is not sufficient, the displacement of the electromagnet mounting portion becomes large, the accuracy of particle beam irradiation is impaired, and the accelerated particle beam cannot be accurately irradiated to the affected part.

加えて、電磁石に接続されるケーブルは数十ｔと重く、このケーブルを巻取るためのケーブルスプールは本体胴に直接接続されているので、ケーブル及びケーブルスプールの重量が本体胴に直接負荷され、本体胴の変形が大きくなり、粒子線照射精度の低下につながることが課題であった。 In addition, the cable connected to the electromagnet is heavy with several tens of t, and the cable spool for winding this cable is directly connected to the main body trunk, so the weight of the cable and the cable spool is directly applied to the main body trunk, The main problem was that the deformation of the main body would increase, leading to a decrease in particle beam irradiation accuracy.

さらに、回転時は、ケーブル及びケーブルスプールに起因する慣性モーメントが本体胴に負荷され、慣性モーメントが増加するほど、緊急停止時の制動時間が長くなる可能性があった。 Further, during the rotation, the inertia moment caused by the cable and the cable spool is applied to the main body, and the braking time at the time of emergency stop may be longer as the inertia moment increases.

上記実施形態に係る粒子線治療装置は、回転ガントリーの本体胴と、この本体胴に設けられ粒子線の軌道を確保するための電磁石と、この電磁石に電力や信号を供給するケーブルと、このケーブルを巻き取るためのケーブルスプールを有し、前記ケーブルスプールは前記本体胴と独立して支持架台で支持したことを特徴とする。   The particle beam therapy system according to the above embodiment includes a main body cylinder of a rotating gantry, an electromagnet provided on the main body cylinder for ensuring the trajectory of the particle beam, a cable for supplying power and signals to the electromagnet, and the cable. A cable spool for winding the cable spool, and the cable spool is supported by a support frame independently of the main body barrel.

本発明の実施形態は、粒子線照射精度が高くかつ低重量の粒子線治療装置を提供することができる。   The embodiment of the present invention can provide a particle beam therapy apparatus with high particle beam irradiation accuracy and low weight.

本発明の実施形態を示す回転ガントリーの一部切欠き側面図。The partially cutaway side view of the rotation gantry which shows embodiment of this invention. 図１に示したケーブルスプールを拡大して示す側面図。The side view which expands and shows the cable spool shown in FIG. 図２に示したケーブルスプールのＡ−Ａ矢視断面図。The AA arrow sectional drawing of the cable spool shown in FIG. 図２に示したケーブルスプールの支持部分を拡大して示す要部拡大側面図。The principal part expansion side view which expands and shows the support part of the cable spool shown in FIG. 図２に示した本体胴とケーブルスプールの接続部分を拡大して示す要部拡大断面図。The principal part expanded sectional view which expands and shows the connection part of the main body trunk | drum shown in FIG. 2, and a cable spool. 図５に示した接続軸の他の実施例を示す要部拡大断面図。The principal part expanded sectional view which shows the other Example of the connecting shaft shown in FIG. 図４に示した支持架台の他の実施例を示す要部拡大側面図。The principal part expanded side view which shows the other Example of the support stand shown in FIG. 粒子線治療装置の従来例を示す概略構成図。The schematic block diagram which shows the prior art example of a particle beam therapy apparatus.

以下、本発明の実施形態に係わる回転ガントリーを含む粒子線治療装置の実施例について図１から図５を参照して説明する。なお、図１から図５の粒子線治療装置の実施例において、図８と同一部分には同一符号を付してその構成の説明を省略する。   Hereinafter, an example of a particle beam therapy system including a rotating gantry according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. In the embodiment of the particle beam therapy system of FIGS. 1 to 5, the same parts as those in FIG.

図１に示す回転ガントリー１８は、主に本体胴４、電磁石５、ケーブルスプール９、ケーブル１３から構成されている。 A rotating gantry 18 shown in FIG. 1 mainly includes a main body barrel 4, an electromagnet 5, a cable spool 9, and a cable 13.

本体胴４は、加速粒子線の軌道を確保するための電磁石５を支持する役割を持っている。この本体胴４内には放射線治療室１が設けられている。 The main body cylinder 4 has a role of supporting an electromagnet 5 for securing the trajectory of the accelerated particle beam. A radiation treatment room 1 is provided in the main body barrel 4.

本体胴４は駆動モータ１５により、ターニングローラ８を介して円筒中心を回転軸として回転駆動する。この構成により加速粒子線を任意の方向から放射線治療室１内に位置する治療台２上の前記患者３に照射できる構造となっている。 The main body cylinder 4 is rotationally driven by a drive motor 15 via a turning roller 8 with the center of the cylinder as a rotation axis. With this configuration, the accelerated particle beam can be irradiated to the patient 3 on the treatment table 2 located in the radiation treatment room 1 from an arbitrary direction.

この、本体胴４は、電磁石５搭載部の変位を抑制するため、充分な剛性を有する構造となっている。 The main body cylinder 4 has a structure having sufficient rigidity to suppress displacement of the electromagnet 5 mounting portion.

電磁石５は、磁石サポート６を介して前記本体胴４に支持され、磁場により加速粒子線の軌道を定める役割を持っている。加速粒子線は電磁石５を介して照射ポート７まで導かれ、治療台２上の患者３に適切に照射されるように構成されている。   The electromagnet 5 is supported by the main body cylinder 4 via a magnet support 6 and has a role of determining the trajectory of the accelerated particle beam by a magnetic field. The accelerated particle beam is guided to the irradiation port 7 through the electromagnet 5 so as to be appropriately irradiated to the patient 3 on the treatment table 2.

ケーブルスプール９は、図２から図４に示す通り本体胴４と分離設置され、回転支持棒２１、軸受１２を介して支持架台１４により支持されている。このケーブルスプール９には電磁石５に電力や信号を供給しているケーブル１３が巻き取られている。   As shown in FIGS. 2 to 4, the cable spool 9 is installed separately from the main body body 4, and is supported by the support base 14 via the rotation support rod 21 and the bearing 12. A cable 13 that supplies power and signals to the electromagnet 5 is wound around the cable spool 9.

軸受１２は、図２、４に示す通り、ケーブルスプール９と支持架台１４の間に設置され、ケーブルスプール９の重量を支持架台１４に伝達する構成となっている。支持架台１４は、軸受１２を介してケーブルスプール９及びケーブルスプール９に巻取られるケーブル１３の荷重を支持している。 As shown in FIGS. 2 and 4, the bearing 12 is installed between the cable spool 9 and the support base 14 and transmits the weight of the cable spool 9 to the support base 14. The support base 14 supports the load of the cable spool 9 and the cable 13 wound around the cable spool 9 via the bearing 12.

本体胴４とケーブルスプール９を接続する接続軸１０は、図２、３、５に示す通り、本体胴４に取り付けられている。ケーブルスプール９に設けられている接続軸固定具１１は、図２、４に示す通り、上述した接続軸１０に接続されている。前記接続軸１０と接続軸固定具１１を介して、本体胴４の回転が、前記ケーブルスプール９に伝達される。すなわち、ケーブルスプール９は本体胴４に従属して回転することができる。なお、図３において接続軸１０は４箇所に設けた例を示したが、本体胴４に従属して回転することができるように少なくとも一つ配置すれば良く、またケーブルスプール９と同等の径を有する円筒を本体胴４とケーブルスプール９に同心状に配置しても同様の作用を得ることができる。 The connection shaft 10 that connects the main body cylinder 4 and the cable spool 9 is attached to the main body cylinder 4 as shown in FIGS. The connection shaft fixture 11 provided in the cable spool 9 is connected to the connection shaft 10 described above as shown in FIGS. The rotation of the main body cylinder 4 is transmitted to the cable spool 9 through the connection shaft 10 and the connection shaft fixture 11. That is, the cable spool 9 can rotate depending on the main body barrel 4. 3 shows an example in which the connection shafts 10 are provided at four locations. However, at least one connection shaft 10 may be arranged so as to be able to rotate depending on the main body cylinder 4, and the diameter is the same as that of the cable spool 9. The same effect can be obtained even if a cylinder having the above is concentrically disposed on the main body cylinder 4 and the cable spool 9.

ケーブル１３はケーブルスプール９の従属回転により巻取られ、このケーブル１３及びケーブルスプール９の荷重数十ｔは支持架台１４を介して支持されるため、本体胴４から独立して支持される。また、本体胴４の回転に伴うケーブル１３による慣性モーメントも本体胴４から独立となる。 The cable 13 is wound up by the dependent rotation of the cable spool 9, and the load of several tens of t of the cable 13 and the cable spool 9 is supported via the support frame 14, so that the cable 13 is supported independently from the main body body 4. Further, the moment of inertia due to the cable 13 accompanying the rotation of the main body cylinder 4 is also independent from the main body cylinder 4.

また、図６に示すように接続軸１０は過大な慣性モーメントで破壊されないように所定の荷重で接続が外れるようにマグネットカップリング２２を配置しても良い。 In addition, as shown in FIG. 6, the magnet coupling 22 may be arranged so that the connection shaft 10 is disconnected at a predetermined load so that the connection shaft 10 is not broken by an excessive moment of inertia.

さらに図７に示すように地震等によって本体胴４が回転軸と垂直方向に移動してケーブルスプール９が支持架台１４から外れることを防止するために、回転支持棒２１の端部が断面凹構造の溝２４を有して支持するケーブルスプール９に嵌合される構成とし、さらに支持架台１４に突出部２３が形成されても良い。 Further, as shown in FIG. 7, in order to prevent the main body cylinder 4 from moving in the direction perpendicular to the rotation axis due to an earthquake or the like and detaching the cable spool 9 from the support frame 14, the end of the rotation support bar 21 has a concave structure in cross section. It is possible to fit the cable spool 9 having the groove 24 and support it, and the support frame 14 may be further formed with a protrusion 23.

よって、本実施形態によれば、ケーブルスプール９及びケーブル１３の荷重数十ｔが本体胴４に印加されないので、本体胴４の変形を小さくすることができる。そして、変形を小さくするため、胴部の板厚を厚くすることや、補強部材を追加する必要がなくなるので、本体胴４はより薄肉中空構造を実現でき、小型軽量とすることができる。 Therefore, according to the present embodiment, the load of several tens of t of the cable spool 9 and the cable 13 is not applied to the main body cylinder 4, so that the deformation of the main body cylinder 4 can be reduced. And in order to make a deformation | transformation small, it becomes unnecessary to increase the plate | board thickness of a trunk | drum, or to add a reinforcement member, Therefore The main body trunk | drum 4 can implement | achieve a thin-walled hollow structure, and can be made small and lightweight.

１…放射線治療室
２…治療台
３…患者
４…本体胴
５…電磁石
６…磁石サポート
７…照射ポート
８…ターニングローラ
９…ケーブルスプール
１０…接続軸
１１…接続軸固定具
１２…軸受
１３…ケーブル
１４…支持架台
１５…駆動モータ
１６…加速粒子線発生装置
１７…粒子線輸送系
１８…回転ガントリー
１９…粒子ビーム発生装置
２０…粒子線治療装置
２１…回転支持棒
２２…マグネットカップリング
２３…突出部
２４…溝 DESCRIPTION OF SYMBOLS 1 ... Radiotherapy room 2 ... Treatment table 3 ... Patient 4 ... Body trunk | 5 ... Electromagnet 6 ... Magnet support 7 ... Irradiation port 8 ... Turning roller 9 ... Cable spool 10 ... Connection shaft 11 ... Connection shaft fixing tool 12 ... Bearing 13 ... Cable 14 ... Support base 15 ... Drive motor 16 ... Accelerated particle beam generator 17 ... Particle beam transport system 18 ... Rotary gantry 19 ... Particle beam generator 20 ... Particle beam therapy device 21 ... Rotation support rod 22 ... Magnetic coupling 23 ... Protrusion 24 ... groove

Claims (6)

回転ガントリーの本体胴と、この本体胴に設けられ粒子線の軌道を確保するための電磁石と、この電磁石に電力や信号を供給するケーブルと、このケーブルを巻き取るためのケーブルスプールを有し、前記ケーブルスプールは前記本体胴と独立して支持架台で支持したことを特徴とする粒子線治療装置。 It has a main body of the rotating gantry, an electromagnet provided on the main body for ensuring the trajectory of the particle beam, a cable for supplying power and signals to the electromagnet, and a cable spool for winding the cable. The particle beam therapy apparatus according to claim 1, wherein the cable spool is supported by a support frame independently of the body trunk. 前記ケーブルスプールと前記本体胴との間に接続機構を有し、この接続機構を介して、ケーブルスプールが本体胴に従属して回転することを特徴とする請求項１に記載の粒子線治療装置。 2. The particle beam therapy system according to claim 1, wherein a connection mechanism is provided between the cable spool and the main body cylinder, and the cable spool rotates depending on the main body cylinder via the connection mechanism. . 前記ケーブルスプール及び巻取られたケーブルの荷重を、前記支持架台を介して支持することを特徴とする請求項１または請求項２に記載の粒子線治療装置。 The particle beam therapy system according to claim 1 or 2, wherein a load of the cable spool and the wound cable is supported through the support frame. 前記ケーブルスプールと前記支持架台の間には前記ケーブルスプールを回転自在に支持する回転支持機構を設けることを特徴とする請求項１から請求項３の何れか１項に記載の粒子線治療装置。 The particle beam therapy system according to any one of claims 1 to 3, wherein a rotation support mechanism that rotatably supports the cable spool is provided between the cable spool and the support frame. 前記接続機構は所定の荷重で接続が外れるようにマグネットカップリングで接続されていることを特徴とする請求項２から請求項４の何れか１項に記載の粒子線治療装置。 The particle beam therapy system according to any one of claims 2 to 4, wherein the connection mechanism is connected by a magnetic coupling so that the connection is released by a predetermined load. 前記支持架台には前記回転支持機構を保持する突出部が形成されていることを特徴とする請求項４または５に記載の粒子線治療装置。   6. The particle beam therapy system according to claim 4, wherein the support frame is formed with a protrusion for holding the rotation support mechanism.
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CN108888874A (en) * 2018-06-08 2018-11-27 中国科学院上海应用物理研究所 The rotary frame of one proton heavy ion device
WO2021235032A1 (en) * 2020-05-21 2021-11-25 株式会社日立製作所 Rotary gantry for particle beam treatment apparatus, and method for winding linear member
WO2023058324A1 (en) * 2021-10-05 2023-04-13 東芝エネルギーシステムズ株式会社 Device for monitoring rotating gantry, method for monitoring rotating gantry, and particle beam treatment system

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Publication number Priority date Publication date Assignee Title
CN108888874A (en) * 2018-06-08 2018-11-27 中国科学院上海应用物理研究所 The rotary frame of one proton heavy ion device
WO2021235032A1 (en) * 2020-05-21 2021-11-25 株式会社日立製作所 Rotary gantry for particle beam treatment apparatus, and method for winding linear member
WO2023058324A1 (en) * 2021-10-05 2023-04-13 東芝エネルギーシステムズ株式会社 Device for monitoring rotating gantry, method for monitoring rotating gantry, and particle beam treatment system

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