PROBLEM TO BE SOLVED: To shorten a diagnostic period by displaying the tomosynthesis image of a cross-section to be imaged including a region of interest to a monitor at the beginning.SOLUTION: An X-ray tube 1 and an FPD (Flat Panel Detector) 2 are placed opposite to each other across a subject M, the X-ray tube and the FPD are moved in the opposite direction, X-ray is successively radiated to the subject from the X-ray tube, and transparent X-ray is detected every time, and a projection image is taken. Image reconstruction processing of a projection image is performed every plurality of cross-section to be imageds MA, Ma2 to Man, Mb1 to Mbn parallel to a detection plane of the FPD within a tomography range, and according to order of processing, a tomosynthesis image of each cross-section to be imaged generated is displayed to a monitor 19. The X-ray tomograph includes a reconstruction processing control unit 16 which performs control so that a main cross-section to be imaged is determined from among the cross-sections to be imaged, image reconstruction processing is started successively from the main cross-section to be imaged to cross-sections to be imaged nearer to the main cross-section to be imaged.COPYRIGHT: (C)2011,JPO&INPIT【課題】関心領域が含まれる撮影断面のトモシンセシス画像が最初にモニタに表示されるようにし、診断時間を短縮する。【解決手段】被検体Mを挟んでX線管1とFPD2を対向配置し、X線管およびFPDを互いに反対向きに移動させつつ、X線管から被検体に対してX線を順次照射してその都度透過X線を検出して投影画像を撮影するとともに、断層撮影範囲内におけるFPDの検出面に平行な複数の撮影断面MA、Ma1~Man、Mb1~Mbn毎に投影画像を画像再構成処理し、その処理の順序に従って、生成した各撮影断面のトモシンセシス画像をモニタ19に表示する。撮影断面のなかから主撮影断面を決定し、画像再構成処理が、主撮影断面から開始され、その後は、主撮影断面に近い撮影断面から順に実行されるように制御を行う再構成処理制御部16を備える。【選択図】図1
