Patent ID: 7659528

Claim:
A particle beam irradiation system comprising: a particle beam irradiation apparatus having a particle beam irradiator for irradiating an affected area of a patient with a particle beam from one direction, said particle beam irradiation apparatus being free of a gantry structure, said particle beam irradiator being housed in a chamber; a CT scanner installed in said chamber, for positionally confirming said affected area of the patient; a drive unit operable to move said patient between a detection zone of said CT scanner and an irradiation zone of said particle beam irradiation apparatus; a patient fixing device for fixing said patient in position, said patient fixing device being mounted on said drive unit, and being rotatable about the craniocaudal axis of said patient; and a housing unit having a structure carrying said drive unit with said patient fixing device mounted and said CT scanner, said housing unit being rotatable in said chamber about an axis perpendicular to a plane including a direction in which the particle beam is applied by said particle beam irradiation apparatus and a direction in which said drive unit moves.