Energy modulation device, particle beam irradiation apparatus using the same, particle beam irradiation method, and particle beam therapy planning apparatus.

The use of a ripple filter with stacked, offset filter members addresses the issue of beam scattering in particle beam irradiation devices, reducing the distance to the patient and enhancing dose uniformity for a more efficient and compact system.

JP7870086B2Active Publication Date: 2026-06-04NAT INST FOR QUANTUM & RADIOLOGICAL SCI & TECH
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
NAT INST FOR QUANTUM & RADIOLOGICAL SCI & TECH
Filing Date
2022-07-29
Publication Date
2026-06-04

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Abstract

Provided are: a particle beam irradiation apparatus that makes it possible to shorten the distance between a patient and an irradiation field forming appliance of the particle beam irradiation apparatus; and an energy modulation device for use in the particle beam irradiation apparatus. This energy modulation device is for use in a particle beam irradiation apparatus 10 which transports, by using a beam transport line 2, charged particle beams extracted from an accelerator 1 and which performs irradiation by a scanning method by using scanning electromagnets 4, 5. In other words, the energy modulation device is a ripple filter 7. The ripple filter 7 comprises filter members 70 each having a plurality of opening parts 72 which penetrate in the thickness direction and through which at least some of the charged particle beams pass. Two or more of the filter members 70 are disposed so as to be laminated in the thickness direction.
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