Energy modulating device, particle beam irradiating device using the same, particle beam irradiating method, and particle-beam radiation therapy planning device

Abstract

Provided are a particle beam irradiating device capable of reducing a distance between an irradiation field forming device of the particle beam irradiating device and a patient, as well as an energy modulating device used for the particle beam irradiating device. The energy modulating device, i.e. a ripple filter 7, used for the particle beam irradiating device 10 that transports, by a beam transport line 2, a charged particle beam extracted from an accelerator 1 and delivers the charged particle beam by a scanning method using scanning magnets 4 and 5. The energy modulating device, i.e. the ripple filter 7, includes a filter member 70 having a plurality of openings 72 which penetrate the filter member 70 in a thickness direction and through which at least a part of the charged particle beam passes, in which the filter member 70 is one of two or more filter members overlapped in the thickness direction.

Dependencies are inferred from the claim text.