| 摘要 |
The objective is to obtain a particle beam therapy system, the irradiation flexibility of which is high and that can reduce the amount of irradiation onto a normal tissue. There are provided a scanning electromagnet 2 that performs scanning and outputting in such a way that a supplied charged particle beam Bec is formed in a three-dimensional irradiation shape based on a treatment plan; and deflection electromagnets 4 and 5 that switch the orbits for the charged particle beam Bec in such a way that the charged particle beam Bec with which scanning and outputting are performed by the scanning electromagnet 2 reaches an isocenter C through a single beam orbit selected from a plurality of beam orbits 7a, 7b, and 7c established between the isocenter C and the scanning electromagnet 2. The distance between the scanning electromagnet and the isocenter is made long.
|
