PROBLEM TO BE SOLVED: To designate a radiation irradiating condition, which is employed in radiotherapy, in consideration of a dose for imaging to be performed to acquire image data.SOLUTION: A radiotherapy apparatus 110 that performs radiotherapy on a therapeutic object region of a patient includes an image/imaging condition acquisition unit 5 that acquires image data of the patient which is fed from a separately provided image acquisition device prior to the radiotherapy and an imaging condition for acquisition of the image data, a dose calculation unit 8 that calculates a therapeutic dose, which is preferable to the radiotherapy, on the basis of the imaging condition, and a radiation control unit 31 that designates a radiation irradiating condition, which is employed in the radiotherapy, on the basis of a result of calculation of the therapeutic dose.COPYRIGHT: (C)2014,JPO&INPIT【課題】画像データの収集時における撮影用の放射線量を考慮して放射線治療における放射線照射条件を設定する。【解決手段】患者の治療対象部位に対して放射線治療を行なう放射線治療装置110は、別途設置された画像収集装置から前記放射線治療に先行して供給される前記患者の画像データとこの画像データの収集時における撮影条件を取得する画像/撮影条件取得部5と、前記撮影条件に基づいて前記放射線治療に好適な治療用放射線量を算出する放射線量算出部8と、前記治療用放射線量の算出結果に基づいて前記放射線治療における放射線照射条件を設定する放射線制御部31とを備える。【選択図】 図2
