Patent ID: 9387346
Filing Date: 2016-07-12
CPC Classification: A61N,H05H

Claim Text:
1. A particle beam treatment system comprising: an accelerator system that accelerates a charged particle beam; and a beam transport system that transports a high-energy beam emitted from an accelerator to an irradiation location, wherein the beam transport system is provided with two steering electromagnets and two beam position monitors corresponding to the steering electromagnets, wherein the first beam position monitor is disposed in the front of the second steering electromagnet and is configured to detect beam position variation over a period of time and to supply a first excitation current for correcting a periodic position variation and a periodic angle variation of the beam position based upon the beam position variation detected by the first beam position monitor, to the first steering electromagnet, and wherein the second beam position monitor is disposed in the back of the second steering electromagnet and is configured to detect beam position variation over the period of time and supply a second excitation current for correcting a periodic position variation and a periodic angle variation of the beam position based upon the beam position variation detected by the second beam position monitor, to the second steering electromagnet.