Particle beam irradiation apparatus and particle beam therapy system
AssigneeMitsubishi Electric Corporation
InventorTakaaki IWATA
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Abstract
The objective of the present invention is to eliminate noise caused by driving a ridge filter and to achieve a uniform dose distribution without making a patient sense discomfort or anxiety. There are provided a ridge filter having a thickness distribution in which the energy that a charged particle beam loses differs depending on the position thereon through which the charged particle beam passes, a deflector that deflects the charged particle beam, and a controller that controls the deflector in such a way that the charged particle beam passes through the thickness distribution of the ridge filter.
Claims14
A particle beam irradiation apparatus that irradiates a charged particle beam accelerated by an accelerator onto an irradiation subject, the particle beam irradiation apparatus comprising:
- a ridge filter having a thickness distribution in which energy that the charged particle beam loses differs depending on the position thereon through which the charged particle beam passes;
- a deflector that deflects the charged particle beam;
- and
- a controller that controls the deflector in such a way that the charged particle beam with a wobbling motion passes through the thickness distribution of the ridge filter.
Dependencies are inferred from the claim text.