Particle beam irradiation treatment planning unit

摘要

A particle beam irradiation apparatus includes a treatment planning unit (140) for creating a treatment plan to perform the treatment with respect to an affected part. The treatment planning unit comprises an input unit, a computing unit, and a display unit for displaying treatment planning information. The computing unit sets a plurality of layer regions that are different in irradiation energy from each other in the irradiation direction of a charged particle beam, in a target including an affected part set using tomography image information including information on the affected part; sets a plurality of irradiation positions of the charged particle beam in each of these layer regions; using an irradiation dose and a reference irradiation dose with respect to each irradiation position set in each layer region, sets the number of times of irradiations of the charged particle beam with respect to each of the irradiation regions set in each of the layer regions; and sets a plurality of number of times of irradiations with respect to at least one said irradiation position in the layer region to create the treatment planning information with respect to the affected part.