| 摘要 |
A particle therapy apparatus has a rotating gantry (10) configured in such a way that an irradiation device (4) is rotated around a rotation axis (X R ) and a particle beam (B) is irradiated onto an irradiation subject; the rotating gantry (10) is provided with an entrance-side deflection electromagnet (1) having a deflection path (1 C ) for radially deflecting the particle beam (B) supplied along the rotation axis (X R ) so as to guide the particle beam (B) to the irradiation device (4) and a straight path (1 S ) that is switchable with the deflection path (1 C ) and is for making the supplied particle beam (B) travel in a straight manner; there are provided trajectory correcting devices (5 and 6) having two position sensors that are arranged along the rotation axis (X R ) so as to flank the entrance-side deflection electromagnet (1). |
