PROBLEM TO BE SOLVED: To provide a particle beam treatment apparatus provided with a PET detector for detecting a &gamma ray generated from a subject which can be irradiated with a particle beam from an optional direction.SOLUTION: The particle beam treatment apparatus includes: a top plate rotation part 106 for rotating a top plate 110 a top plate moving part 108 for translationally moving the top plate 110 in a direction parallel to or orthogonal to a plane including a body axis direction a particle beam irradiation part 103 for irradiating the subject with the particle beam an irradiation nozzle rotation part 104 for rotationally moving the particle beam irradiation part 103 a PET detection part 201 which is disposed between the particle beam irradiation part 103 and the subject so as to surround the subject in a roughly cylindrical shape, is provided with an opening for making the particle beam from the particle beam irradiation part 103 pass through, and detects the &gamma ray generated from the subject a first support arm 203 rotatably holding the PET detector to the shaft in the irradiation direction of the particle beam a second support arm 205 for holding the PET detection part 201 rotatably around the body axis and an image forming part 202 for generating images on the basis of the &gamma ray detected in the PET detection part 201.COPYRIGHT: (C)2010,JPO&INPIT【課題】任意の方向から粒子線を照射可能な被検体から発生されるγ線を検出するPET検出器を備えた粒子線治療装置を提供する。【解決手段】天板110を回転させる天板回転部106と、天板110を体軸方向を含む平面と平行もしくは直交方向に並進移動させる天板移動部108と、被検体に向けて粒子線を照射する粒子線照射部103と、粒子線照射部103を回転移動させる照射ノズル回転部104と、粒子線照射部103と被検体との間に、略筒型の形状で被検体を囲うように配置され、粒子線照射部103からの粒子線を通過させる開口を有し、被検体から発生するγ線を検出するPET検出部201と、粒子線の照射方向の軸に回転可能に保持する第1支持アーム203と、PET検出部201を体軸の周囲に回転可能に保持する第2支持アーム205と、PET検出部201で検出されたγ線を基に画像を生成する画像形成部202とを備える。【選択図】図3
