IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0760422
(2004-01-21)
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우선권정보 |
JP-2002-170778(2002-06-12) |
발명자
/ 주소 |
- Yanagisawa,Masaki
- Akiyama,Hiroshi
- Matsuda,Koji
- Fujimaki,Hisataka
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출원인 / 주소 |
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대리인 / 주소 |
Dickstein Shapiro Morin &
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인용정보 |
피인용 횟수 :
130 인용 특허 :
7 |
초록
▼
The present invention provides an increased degree of uniformity of radiation dose distribution for the interior of a diseased part. A particle beam therapy system includes a charged particle beam generation apparatus and an irradiation apparatus. An ion beam is generated by the charged particle bea
The present invention provides an increased degree of uniformity of radiation dose distribution for the interior of a diseased part. A particle beam therapy system includes a charged particle beam generation apparatus and an irradiation apparatus. An ion beam is generated by the charged particle beam generation apparatus. The irradiation apparatus exposes a diseased part to the generated ion beam. A scattering device, a range adjustment device, and a Bragg peak spreading device are installed upstream of a first scanning magnet and a second scanning magnet. The scattering device and the range adjustment device are combined together and moved along a beam axis, whereas the Bragg peak spreading device is moved independently along the beam axis. The scattering device moves to adjust the degree of ion beam scattering. The range adjustment device moves to adjust ion beam scatter changes caused by an absorber thickness adjustment. The Bragg peak spreading device moves to adjust ion beam scatter changes arising out of an SOBP device. These adjustments provide uniformity of radiation dose distribution for the diseased part.
대표청구항
▼
What is claimed is: 1. A particle beam irradiation system, comprising: a charged particle beam generation apparatus; and an irradiation apparatus for exposing an irradiation target to a charged particle beam emitted from the charged particle beam generation apparatus; wherein said irradiation appar
What is claimed is: 1. A particle beam irradiation system, comprising: a charged particle beam generation apparatus; and an irradiation apparatus for exposing an irradiation target to a charged particle beam emitted from the charged particle beam generation apparatus; wherein said irradiation apparatus includes a scattering device for increasing the size of said charged particle beam and a Bragg peak spreading device through which said charged particle beam passes; and wherein at least one of said scattering device and said Bragg peak spreading device is installed in said irradiation apparatus in such a manner as to be movable in a propagation direction of said charged particle beam, and a control apparatus controls movement of at least one of said scattering device and said Bragg peak spreading device based on therapy plan information. 2. A particle beam irradiation system, comprising: a charged particle beam generation apparatus; and an irradiation apparatus for exposing an irradiation target to a charged particle beam emitted from the charged particle beam generation apparatus; wherein said irradiation apparatus includes a scattering device for increasing the size of said charged particle beam, a range adjustment device for varying the range of said charged particle beam, and a Bragg peak spreading device through which said charged particle beam passes; and wherein at least one of said scattering device, said range adjustment device, and said Bragg peak spreading device is installed in said irradiation apparatus in such a manner as to be movable in a propagation direction of said charged particle beam, and a control apparatus controls movement of at least one of said scattering device and said Bragg peak spreading device based on therapy plan information. 3. The particle beam irradiation system according to claim 2, wherein said scattering device and said range adjustment device are combined together. 4. A particle beam irradiation system, comprising: a charged particle beam generation apparatus; and an irradiation apparatus for irradiating an irradiation target with a charged particle beam emitted from the charged particle beam generation apparatus; wherein said irradiation apparatus includes a beam scanner for scanning said charged particle beam, a scattering device for increasing the size of said charged particle beam, and a Bragg peak spreading device through which said charged particle beam passes; and wherein at least one of said scattering device and said Bragg peak spreading device is installed in said irradiation apparatus in such a manner as to be movable in a propagation direction of said charged particle beam, and a control apparatus controls movement of at least one of said scattering device and said Bragg peak spreading device based on therapy plan information. 5. A particle beam irradiation system, comprising: a charged particle beam generation apparatus; and an irradiation apparatus for exposing an irradiation target to a charged particle beam emitted from the charged particle beam generation apparatus; wherein said irradiation apparatus includes a beam scanner for scanning said charged particle beam, a scattering device for increasing the size of said charged particle beam, a range adjustment device for varying the range of said charged particle beam, and a Bragg peak spreading device through which said charged particle beam passes; and wherein at least one of said scattering device, said range adjustment device, and said Bragg peak spreading device is installed in said irradiation apparatus in such a manner that the device is movable in the propagation direction of said charged particle beam, and a control apparatus controls movement of at least one of said scattering device and said Bragg peak spreading device based on therapy plan information. 6. The particle beam irradiation system according to claim 5, wherein said scattering device and said range adjustment device are combined together. 7. The particle beam irradiation system according to claim 5, further comprising a beam scan controller for controlling said beam scanner and controlling the scan of said charged particle beam to which said irradiation target is exposed. 8. The particle beam irradiation system according to claim 7, wherein said beam scan controller controls said beam scanner so as to scan said charged particle beam in a scanning pattern for a region within said irradiation target. 9. The particle beam irradiation system according to claim 5, wherein a combination of said scattering device and said range adjustment device is installed in said irradiation apparatus in such a manner that the combination is movable in said propagation direction. 10. The particle beam irradiation system according to claim 5, wherein said Bragg peak spreading device is positioned upstream of said beam scanner in said propagation direction. 11. A particle beam irradiation system, comprising: a charged particle beam generation apparatus; and an irradiation apparatus for exposing an irradiation target to a charged particle beam emitted from the charged particle beam generation apparatus; wherein said irradiation apparatus includes a first scattering device for increasing the size of said charged particle beam, a second scattering device through which said charged particle beam passing through said first scattering device passes, and a Bragg peak spreading device through which said charged particle beam passes; and wherein at least one of said scattering devices and said Bragg peak spreading device is installed in said irradiation apparatus in such a manner as to be movable in a propagation direction of said charged particle beam, and a control apparatus controls movement of at least one of said scattering device and said Bragg peak spreading device based on therapy plan information. 12. A particle beam irradiation system, comprising: a charged particle beam generation apparatus; and an irradiation apparatus for exposing an irradiation target to a charged particle beam emitted from the charged particle beam generation apparatus; wherein said irradiation apparatus includes a first scattering device for increasing the size of said charged particle beam, a second scattering device through which said charged particle beam passing through said first scattering device passes, a range adjustment device for varying the range of said charged particle beam, and a Bragg peak spreading device through which said charged particle beam passes; and wherein at least one of said scattering devices, said range adjustment device, and said Bragg peak spreading device is installed in said irradiation apparatus in such a manner as to be movable in a propagation direction of said charged particle beam, and a control apparatus controls movement of at least one of said scattering device and said Bragg peak spreading device based on therapy plan information. 13. The particle beam irradiation system according to claim 12, wherein said first scattering device and said range adjustment device are combined together and the resulting combination of said first scattering device and said range adjustment device is positioned upstream of said second scattering device in said propagation direction. 14. The particle beam irradiation system according to claim 13, wherein a combination of said scattering device and said range adjustment device is installed in said irradiation apparatus in such a manner as to be movable in said propagation direction. 15. A method of adjusting on irradiation apparatus, which includes a scattering device for increasing the size of a charged particle beam emitted from a charged particle beam generation apparatus and a Bragg peak spreading device through which said charged particle beam passes, and which exposes an irradiation target to said charged particle beam, the method comprising the step of: moving at least one of said scattering device and said Bragg peak spreading device based on therapy plan information in a propagation direction of said charged particle beam. 16. A method of adjusting an irradiation apparatus, which includes a scattering device for increasing the size of a charged particle beam emitted from a charged particle beam generation apparatus, a range adjustment device for varying the range of said charged particle beam, and a Bragg peak spreading device through which said charged particle beam passes, and which exposes an irradiation target to said charged particle beam, the method comprising the step of: moving at least one of said scattering device, said range adjustment device, and said Bragg peak spreading device based on therapy plan information in a propagation direction of said charged particle beam. 17. The method according to claim 16, wherein said scattering device is allowed to move in said propagation direction in accordance with the irradiation target size being the therapy plan information in a direction perpendicular to said propagation direction. 18. The method according to claim 16, wherein said range adjustment device is allowed to move in said propagation direction in accordance with the range of said charged particle beam being the therapy plan information. 19. A method of exposing an irradiation target to a charged particle beam emitted from a charged particle beam generation apparatus using an irradiation apparatus which includes a scattering device for increasing the size of said charged particle beam and a Bragg peak spreading device through which said charged particle beam passes, the method comprising the steps of: moving at least one of said scattering device and said Bragg peak spreading device based on therapy plan information in the propagation direction of said charged particle beam; and exposing said irradiation target to said charged particle beam which has passed through said scattering device, said range adjustment device, and said Bragg peak spreading device. 20. A method of exposing an irradiation target to a charged particle beam emitted from a charged particle beam generation apparatus using an irradiation apparatus which includes a scattering device for increasing the size of said charged particle beam, a range adjustment device for varying the range of said charged particle beam, and a Bragg peak spreading device through which said charged particle beam passes, the method comprising the steps of: moving at least one of said scattering device, said range adjustment device, and said Bragg peak spreading device based on therapy plan information in the propagation direction of said charged particle beam; and exposing said irradiation target to said charged particle beam which has passed through said scattering device, said range adjustment device, and said Bragg peak spreading device.
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