PROBLEM TO BE SOLVED: To provide a particle beam therapeutic apparatus capable of easily monitoring interference between driven parts such as a particle beam irradiating part and a therapeutic bed.SOLUTION: A particle beam therapeutic apparatus includes: a particle beam irradiating part driven in rotation together with a rotary gantry to irradiate a particle beam to an affected part of a patient a therapeutic bed loaded with the patient and driven so that a nidus of the patient as an irradiation target of the particle beam matches the isocenter of the particle beam irradiated from the particle beam irradiating part image acquiring means for acquiring an image of the nidus first sphere model generating means for generating a first sphere model covering all or a part of the particle beam irradiating part by a single or a plurality of spheres second sphere model generating means for generating a second sphere model covering all or a part of the therapeutic bed by a single or a plurality of spheres and sphere model interference monitoring means for monitoring interference between the first sphere model and the second sphere model. The first sphere model and the second sphere model are defined in a cylindrical coordinate system concentric with the rotary gantry.COPYRIGHT: (C)2014,JPO&INPIT【課題】粒子線照射部や治療用ベッドなどの被駆動部の干渉を容易に監視できる粒子線治療装置を提供する。【解決手段】回転ガントリと共に回転駆動され、患者の患部に粒子線を照射する粒子線照射部と、患者を搭載し、粒子線の照射対象である患者の病巣が粒子線照射部から照射される粒子線のアイソセンタに合致するように駆動される治療用ベッドと、病巣の画像を取得する画像取得手段と、単一または複数の球によって、粒子線照射部の全部または一部を覆い包む第一の球モデルを生成する第一の球モデル生成手段と、単一または複数の球によって、治療用ベッドの全部または一部を覆い包む第二の球モデルを生成する第二の球モデル生成手段と、第一の球モデルと第二の球モデルの干渉を監視する球モデル干渉監視手段とを備え、第一の球モデルおよび第二の球モデルは、回転ガントリと同心の円柱座標系で定義されている。【選択図】図3
