Patent ID: 7102144
Filing Date: 2006-09-05
Classification: A61N,G21K,H05H

Abstract:
1. A particle beam irradiation apparatus comprising: an accelerator for extracting a charged particle beam; a beam delivery apparatus having a charged particle beam scanning unit and irradiating the charged particle beam extracted from the accelerator; and a controller in which a plurality of irradiation positions, a number of times of irradiation per each irradiation position and an irradiation dose per one time of irradiation are set for each of a plurality of layer regions formed by dividing an affected part in the direction of irradiation of said charged particle beam, and that, for each of said plurality of layer regions, stops the irradiation of the charged particle beam from the beam delivery apparatus, and, in a state where the irradiation of the charged particle beam is stopped, controls the charged particle beam scanning unit to change the irradiation position of the charged particle beam, and then starts the irradiation of the charged particle beam from the beam delivery apparatus after said change, the stoppage of beam irradiation, the change in the irradiation position and the starting of the beam irradiation being repeated until the charged particle beam is irradiated to all of said plurality of set irradiation positions, and that, upon the irradiation of the charged particle beam to each of said plurality of set irradiation positions, controls the charged particle beam scanning unit such that the beam irradiation at one position is divided into a plurality of times and the number of times of irradiation becomes said set number of times while the irradiation dose per one time of irradiation becomes said set irradiation dose.