Particle beam therapy system
AssigneeMitsubishi Electric Corporation
InventorYuehu Pu
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Abstract
There is provided a particle beam therapy system that can rapidly change beam energy without increasing the size of a deflection electromagnet even in the case where the number of required beam-energy changes is large. There is provided a plurality of beam energy changing units each provided with a beam energy attenuation unit; a beam is deflected in such a way as to sequentially passes through the plurality of beam energy changing units; while a beam passes through one of the beam energy changing unit, the beam energy attenuation amount of another beam energy changing unit is changed.
Claims8
A particle beam therapy system comprising:
- a beam energy changing unit that changes the energy of an incident particle beam;
- a beam energy change control unit that outputs a command for controlling the beam energy changing unit;
- an irradiation unit that irradiates a particle beam exiting from the beam energy changing unit onto an irradiation subject;
- and
- an irradiation control unit that outputs a command for controlling the energy and position of a particle beam to be irradiated onto the irradiation subject,
- wherein the beam energy changing unit includes deflection electromagnets that sequentially deflect the incident particle beam into a plurality of intra-apparatus beam orbits, variable energy attenuation units disposed in the respective intra-apparatus beam orbits, and a deflection electromagnet that performs deflection in such a way that particle beams that pass through the respective variable energy attenuation units fall into a single and the same orbit;
- and while a particle beam passes through one of the variable energy attenuation units, the beam energy change control unit performs control in such a way as to change the energy attenuation amount of at least one of the other variable energy attenuation units, based on the command from the irradiation control unit.
Dependencies are inferred from the claim text.