Title:
ENERGY DEGRADER AND CHARGED PARTICLE BEAM IRRADIATION SYSTEM EQUIPPED THEREWITH
Document Type and Number:
WIPO Patent Application WO/2012/169281
Kind Code:
A1
Abstract:
The present invention provides an energy degrader (10), capable of mitigating the reduction in the transmittance of low-energy charged particle beams, and a charged particle beam irradiation system equipped therewith. The energy degrader is equipped with a plurality of attenuation members (11A-11G) with differing magnitudes of energy attenuation, and the low-energy-side attenuation member (11G) with a high magnitude of attenuation is formed from material that has a transmittance exceeding that of the high-energy-side attenuation member (11A) with a low magnitude of attenuation.
Inventors:
MIYASHITA TAKUYA (JP)
UEDA TAKAMASA (JP)
UEDA TAKAMASA (JP)
Application Number:
PCT/JP2012/059585
Publication Date:
December 13, 2012
Filing Date:
April 06, 2012
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
MIYASHITA TAKUYA (JP)
UEDA TAKAMASA (JP)
MIYASHITA TAKUYA (JP)
UEDA TAKAMASA (JP)
International Classes:
G21K3/00; A61N5/10; G21K5/04
Foreign References:
| JPH10270200A | 1998-10-09 | |||
| JP2006142315A | 2006-06-08 | |||
| JP2004313314A | 2004-11-11 |
Other References:
VLADIMIR ANFEROV: "Energy degrader optimization for medical beam lines", NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH A, vol. 496, 2003, pages 222 - 227
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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Claims: