Patent ID: 8581196
Filing Date: 2013-11-12
Classification: A61B,A61N,G01T

Abstract:
1. A detector-shift type combined radiation therapy/PET apparatus for applying radiation to a body, the apparatus comprising: an open PET device including a plurality of detector rings that are arranged to be opposed to each other in a direction of an axis of the body, the open PET device being structured to perform radiation measurement inside bores of the rings; a radiation irradiation device that is capable of irradiation with radiation through a space defined by two mutually-adjoining detector rings, thereby forming an irradiation field in the space; rails, wherein at least either one of the two mutually-adjoining detector rings is a movable detector ring disposed on the rails, and the movable detector ring is located in a retracted position on the rails away from the irradiation field so as to avoid damage from irradiation during the radiation irradiation; and a gantry position control device controlling movement of the moveable detector ring such that the movable detector ring performs radiation measurement while moving on the rails on an irradiation-field side of the retracted position after the irradiation.