PROBLEM TO BE SOLVED: To materialize a particle beam rotary irradiation apparatus which can improve throughput of particle beam therapy and in which a rotary part support structure can be made compact.SOLUTION: A particle beam rotary irradiation apparatus includes a rotation part 20 which has a beam transport part 2 for transporting charged particle beam 18 to an irradiation nozzle 4 and is rotatable around an isocenter and a rotation part support base 25 for rotatably supporting the rotation part 20. The beam transport part 2 has a plurality of deflection electromagnets 3 which once deflect the charged particle beam 18 incident along a rotation axis 1 of the rotation part 20 to an outer periphery side, and then deflect the charged particle beam 18 in the direction of the rotary shaft, and transport it to the irradiation nozzle 4. A deflection electromagnet 3c on the most downstream side of the beam transport part 2 is arranged in such a way that a beam incident axis 14 of the deflection electromagnet 3c diagonally passes through a flat surface including the rotation axis 1 and a beam irradiation axis 5 of the irradiation nozzle 4.COPYRIGHT: (C)2014,JPO&INPIT【課題】粒子線治療のスループットを向上することができ、かつ回転部支持構造を小型にできる粒子線回転照射装置を実現することを目的とする。【解決手段】照射ノズル4へ荷電粒子ビーム18を輸送するビーム輸送部2を有し、アイソセンタを中心に回転可能な回転部20と、回転部20を回転可能に支持する回転部支持ベース25を備え、ビーム輸送部2は、回転部20の回転軸1に沿って入射される荷電粒子ビーム18を一旦外周側へ偏向し、その後回転軸の方向に偏向して照射ノズル4へ輸送する複数の偏向電磁石3を有し、ビーム輸送部2の最下流側の偏向電磁石3cは、そのビーム入射軸14が回転軸1及び照射ノズル4のビーム照射軸5を含む平面を斜めに通過するように配置されたことを特徴とする。【選択図】図1
