Radiant energy – Irradiation of objects or material – Ion or electron beam irradiation
Reexamination Certificate
2005-02-04
2009-12-08
Berman, Jack I (Department: 2881)
Radiant energy
Irradiation of objects or material
Ion or electron beam irradiation
C250S492100, C250S503100, C250S493100, C250S505100, C600S411000, C315S501000, C315S502000, C315S503000, C315S505000
Reexamination Certificate
active
07629598
ABSTRACT:
In a particle beam irradiation method and a particle beam irradiation apparatus in which depth direction irradiation field spread and lateral direction irradiation field spread are performed, an irradiation dose in each of the irradiation layers of an irradiation target is made substantially constant, the control is simplified, and the irradiation error by the displacement of the irradiation target is reduced. The depth direction irradiation field spread is an active irradiation field spread to superimpose plural irradiation layers having different ranges in the irradiation direction of the particle beam. A bolus having a shape along a deepest part of the irradiation target in the depth direction is disposed to cross the particle beam. At least one irradiation layer selected from the plural irradiation layers is re-irradiated one or more times with the particle beam.
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Berman Jack I
Buchanan & Ingersoll & Rooney PC
Ippolito Rausch Nicole
Mitsubishi Denki & Kabushiki Kaisha
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