Patent ID: 7586112

Claim:
A particle therapy system comprising: a charged particle beam generator for generating a charged particle beam; an irradiation apparatus for irradiating the charged particle beam extracted from said charged particle beam generator to an irradiation target; a rotating gantry including said irradiation apparatus and installed rotatably; a beam transport system for transporting the charged particle beam extracted from said charged particle beam generator to said irradiation apparatus, said beam transport system including a gantry portion located in said rotating gantry; and a control unit for controlling part of magnets disposed in said gantry portion of said beam transport system by using first command values of a first command value group depending on a rotation angle of said rotating gantry in a group of command values stored in storing means to command excitation currents for magnets disposed in said charged particle beam generator and said beam transport system, and controlling said magnets disposed in said charged particle beam generator and the magnets disposed in said beam transport system other than said part of magnets disposed in said gantry portion by using second command values of a second command value group not depending on the rotation angle of said rotating gantry in said group of command values stored in said storing means.