| 摘要 |
PROBLEM TO BE SOLVED: To provide a particle beam therapy device that realizes highly-accurate positioning of a rotary gantry. ! SOLUTION: A particle beam therapy device 10 comprises: a body barrel 15 that is provided with an emission unit 13 for emitting a particle beam 12 in a therapy space 11 and is provided with a beam transport system 14 for guiding the particle beam 12 to the emission unit 13; a drive roller 17 that supports the body barrel 15 on an upstream side of entry of the particle beam 12 and rotates the body barrel 15 through rotary drive of a motor 27; a driven roller 18 that supports the body barrel 15 on a side of the therapy space 11 and rotates in accordance with the movement of the body barrel 15; an angle detection sensor 22 that detects a rotation angle of the driven roller 18; a first angle detection unit 24 that obtains a rotation angle of the body barrel 15 corresponding to the detected rotation angle of the driven roller 18; and a driving quantity calculation unit 25 that calculat |
