PROBLEM TO BE SOLVED: To provide an apparatus and a method for positioning a patient in a radiation therapy by which the period of time for a radiation therapy is shortened and the exposure on the patient is reduced by reducing the number of times of repeated positioning of the patient in the radiation therapy.SOLUTION: The apparatus for positioning the patient includes: a treatment table 10 to which the patient is fixed an X-ray image capturing apparatus 20 for capturing the X-ray image of the patient and a calculator 30 for carrying out a patient positioning process which takes the X-ray image of the patient, compares the image with a reference image, calculates the moving amount of the treatment table when there is positional deviation, and moves the treatment table. Before starting positioning, the patient positioning process executes a rough position positioning learning processing for learning a rough positioning position of the treatment table on the basis of treatment table positioning data in the past of the patient, and treatment table primary movement process for moving the treatment table at the learned rough positioning position.COPYRIGHT: (C)2010,JPO&INPIT【課題】放射線治療における患者の位置決め繰り返し回数を低減し、治療時間の短縮化と患者の被爆量の低減化を図る放射線治療における患者位置決め装置および患者位置決め方法を得る。【解決手段】患者位置決め装置は、患者が固定される治療台10と、患者のX線画像を撮像するX線撮像装置20と、患者のX線画像を取り込んで参照画像との画像照合を行い、位置ずれがある場合に治療台の移動量を演算して移動させる患者位置決め処理が実行される位置決め計算機30とを備え、患者位置決め処理は、位置決め開始前に、患者の過去の治療台位置決めデータに基づいて治療台の粗位置決め位置を学習させる粗位置決め位置学習処理と、学習させた粗位置決め位置に治療台を移動させる治療台初期移動処理とを実行する。【選択図】図1
