Patent ID: 8466441
Filing Date: 2013-06-18
Classification: A61B,A61N

Abstract:
1. A particle beam therapy system that irradiates a charged particle beam, accelerated by an accelerator and scanned by a scanning electromagnet, onto a diseased site of a patient, the particle beam therapy system comprising: an irradiation management apparatus that controls the scanning electromagnet, based on desired irradiation position coordinates of the charged particle beam; and an interlock information inputting device that generates an interlock signal for stopping irradiation of the charged particle beam, when a contingency occurs, wherein the irradiation management apparatus is provided with a command value generator that outputs a control input to the scanning electromagnet; and a stop step storage memory that stores a stop step corresponding to the desired irradiation position coordinates at which irradiation of the charged particle beam stops, when the interlock signal is generated by the interlock information inputting device, and wherein when irradiation of the charged particle beam is resumed, the irradiation management apparatus performs idle operation in which the scanning electromagnet is controlled, with the charged particle beam unirradiated, from a start step, which is situated prior to the stop step and is different from an initial step corresponding to the initial desired irradiation position coordinates in actual irradiation, to the stop step, and then irradiates the charged particle beam from the desired irradiation position coordinates corresponding to the stop step.