PROBLEM TO BE SOLVED: To provide a radiation tomography apparatus capable of accurately performing tomosynthesis imaging on a patient or like with difficulty of standing up while suppressing an introduction cost by using existing equipment of a facility.SOLUTION: A radiation tomography apparatus 1 includes a radiation detector F which acquires a projection image S with a plurality of radiation detection elements 7 arranged on a surface 4a of a substrate 4, a radiation source 61 which irradiates the radiation detector F with radiation via a subject H, a subject table 70 which holds the subject H, and a conveyance device 71 which moves the subject table 70 in a prescribed direction. The conveyance device 71 moves the subject H held by the subject table 70 in a direction parallel to the extension direction of the surface 4a of the substrate 4 of the radiation detector F between the radiation source 61 and the radiation detector F whose positions are fixed by moving the subject table 70. The radiation detector F performs a predetermined number of acquiring processing of the projection image while the conveyance device 71 moves the subject table 70 to move the subject H.COPYRIGHT: (C)2015,JPO&INPIT【課題】施設に既設の設備を用いて導入コストを抑制しつつ、かつ、起立することが困難な患者等に対しても的確にトモシンセシス撮影を行うことが可能な放射線断層撮影装置を提供する。【解決手段】放射線断層撮影装置1は、基板4の面4a上に配列された複数の放射線検出素子7で投影画像Sを取得する放射線検出器Fと、被写体Hを介して放射線検出器Fに放射線を照射する放射線源61と、被写体Hを保持する被写体台70と、被写体台70を所定方向に移動させる搬送装置71とを備え、搬送装置71は、被写体台70を移動させることにより、被写体台70に保持された被写体Hを、位置が固定された放射線源61と放射線検出器Fの間を、放射線検出器Fの基板4の面4aの延在方向に平行な方向に移動させ、放射線検出器Fは,搬送装置71が被写体台70を移動させて被写体Hを移動させる間に所定回数の投影画像の取得処理を行う。【選択図】図1
