Patent ID: 8217364

Claim:
A particle beam irradiation apparatus comprising: an accelerator; a scanning electromagnet; and a controller for controlling the accelerator and the scanning electromagnet to irradiate a charged particle beam from the accelerator to an irradiation subject, the scanning electromagnet having: an X-direction scanning electromagnet; and a Y-direction scanning electromagnet for scanning in a direction perpendicular to a scanning direction of the X-direction scanning electromagnet, the controller having: an X-direction inverse mapping mathematical expression model for generating an X-direction command value for exciting the X-direction scanning electromagnet; a Y-direction inverse mapping mathematical expression model for generating a Y-direction command value for exciting the Y-direction scanning electromagnet; and a kinetic energy inverse mapping mathematical expression model for generating a command value of kinetic energy for the accelerator for accelerating the charged particle beam, from a desired irradiation position coordinate of the charged particle beam in the irradiation subject so that irradiation to the irradiation subject is implemented on the basis of the command values concerned, each of the X-direction, Y-direction and kinetic energy inverse mapping mathematical expression models containing all of three variables when the desired irradiation position coordinate is represented by the three variables concerned, wherein the X-direction and Y-direction scanning electromagnets and the accelerator are controlled on the basis of the X-direction, Y-direction and kinetic energy command values generated from the desired irradiation position coordinate of the charged particle beam in the irradiation subject by the X-direction, Y-direction and kinetic energy inverse mapping mathematical expression models to control the charged particle beam, thereby irradiating the irradiation subject with the charged particle beam.