PROBLEM TO BE SOLVED: To make it possible to highly accurately perform dose management in a particle beam treatment apparatus which captures an image of an affected part by X-ray irradiation during a treatment time, including an irradiation preparation period and an irradiation period of particle beams.SOLUTION: A particle beam treatment apparatus comprises: a particle beam generating device for generating a particle beam an irradiation field forming device which is disposed in a treatment chamber and emits the particle beam to a target a particle beam transport system 6 for communication between the particle beam generating device and the irradiation field forming device an X-ray imaging device which is disposed in the treatment chamber and emits X rays and captures an image of the position of the target a dosimeter 8 disposed at a position through which the particle beam passes in the irradiation field forming device and a control device 400 for control such that X-ray measurement results are excluded from the measurement results of the dosimeter 8 when X-rays are emitted during a treatment time.COPYRIGHT: (C)2014,JPO&INPIT【課題】粒子線の照射準備期間及び照射期間を含めた治療時間中にX線照射による患部撮像を行う粒子線治療装置において、高精度に粒子線の線量管理を行うことができる粒子線治療装置を提供する。【解決手段】粒子線を発生させる粒子線発生装置と、治療室内に設置され、標的に対して粒子線を照射する照射野形成装置と、粒子線発生装置と照射野形成装置とを連絡する粒子線輸送系6と、治療室内に設置され、X線を照射して標的の位置を撮像するX線撮像装置と、照射野形成装置内かつ粒子線が通過する位置に設置された線量計測器8と、治療時間中にX線が照射されるとき、線量計測器8の計測結果からX線の計測結果を除外するように制御する制御装置400を備える粒子線治療装置。【選択図】 図1
