Radiant energy – Irradiation of objects or material – Ion or electron beam irradiation
Reexamination Certificate
2006-05-23
2006-05-23
Wells, Nikita (Department: 2881)
Radiant energy
Irradiation of objects or material
Ion or electron beam irradiation
C315S501000, C315S505000, C315S507000
Reexamination Certificate
active
07049613
ABSTRACT:
A particle therapy system, as one example of a particle beam irradiation system, comprises a charged particle beam generator and an irradiation field forming apparatus. An ion beam from the charged particle beam generator is irradiated to a diseased part in the body of a patient through the irradiation field forming apparatus. A scattering compensator and a range modulation wheel (RMW) are disposed on the upstream side in a direction of beam advance and are movable along a beam axis. The movement of the scattering compensator and the RMW adjusts a size of the ion beam entering a scatterer device, whereby a change in scattering intensity of the ion beam in the scatterer device is adjusted. As a result, a penumbra in dose distribution is reduced and a more uniform dose distribution in a direction perpendicular to the direction of beam advance is obtained in the diseased part.
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Akiyama Hiroshi
Fujimaki Hisataka
Matsuda Koji
Yanagisawa Masaki
Dickstein , Shapiro, Morin & Oshinsky, LLP
Hitachi , Ltd.
Vanore David A.
Wells Nikita
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