A particle therapy system capable of confirming energy of an accelerated charged particle beam before the charged particle beam is irradiated to an irradiation target. A beam position monitor is disposed in a synchrotron, and a cavity voltage monitor is associated with an RF cavity for acceleration....http://www.google.com.au/patents/US7439528?utm_source=gb-gplus-sharePatent US7439528 - Particle therapy system and method
