Charged particle beam extraction system and method

Details Charged particle beam extraction system and method Charged particle beam extraction system and method

2006-03-30

2008-11-25

Berman, Jack I. (Department: 2881)

Radiant energy

Irradiation of objects or material

Ion or electron beam irradiation

C250S492100, C250S398000, C250S397000, C250S3960ML, C250S505100

Reexamination Certificate

active

07456415

ABSTRACT:
A ridge filter or a range modulation wheel (RMW) is formed to have a shape corresponding to an affected part in the patient body. A plurality of spread-out Bragg peaks with the same dose or different doses are formed in the affected part by executing beam-on/off control of the RMW, beam current control with rotation of the RMW, intensity modulation control, or scanning irradiation. As an alternative, a spread-out Bragg peak containing a portion with a different dose is formed. A treatment time is cut.

REFERENCES:
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patent: 6617598 (2003-09-01), Matsuda
patent: 2003/0160189 (2003-08-01), Matsuda
patent: 2004/0149934 (2004-08-01), Yanagisawa et al.
patent: 2004/0200983 (2004-10-01), Fujimaki et al.
patent: 2005/0051740 (2005-03-01), Yanagisawa et al.
patent: 2006/0017015 (2006-01-01), Sliski et al.
patent: 2006/0163496 (2006-07-01), Hiramoto et al.
“Review of Scientific Instruments” vol. 64, No. 8 ( Aug. 1993) pp. 2074-2088.

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