Patent ID: 8314411

Claim:
A particle beam therapy system comprising: an accelerator that accelerates a charged particle beam; a beam scanning apparatus for performing scanning with the charged particle beam; a first duct that transports the charged particle beam through the inside of the beam scanning apparatus; an irradiation apparatus that has a second duct in which a beam outlet window is provided at a more downstream position than the beam scanning apparatus, and that irradiates the charged particle beam onto an irradiation subject through the inside of the first duct and the second duct; and a beam transport apparatus that has a third duct and transports, through the inside of the third duct, the charged particle beam exciting from the accelerator to the irradiation apparatus, wherein the first duct and the second duct are devoid of deflection electromagnets, and a vacuum region inside the first duct, a vacuum region inside the second duct, and a vacuum region inside the third duct communicate with one another.