Patent ID: 8309939
Filing Date: 2012-11-13
Classification: A61N

Abstract:
1. A particle beam treatment apparatus which divides a predetermined region of a target volume into multiple layers in a traveling direction of particle beams and irradiates the particle beams, the apparatus comprising: a particle beam irradiation section including a dose monitor which monitors a dose of the particle beams as a count value and forming an irradiation field in the predetermined region; and a treatment control section controlling the operation of the particle beam irradiation section in such a manner that when a calibration factor obtained for each layer by dividing a physical dose at the time of irradiating the particle beams for an i-th layer of the multiple layers by the count value is defined as αi, and the count value reaches a value obtained by dividing a target dose for the i-th layer by the calibration factor αi, the irradiation of the particle beams for the i-th layer is stopped, and irradiation is carried out for another layer other than the i-th layer.