PROBLEM TO BE SOLVED: To provide a tomosynthesis imaging apparatus that obtains a better quality tomographic image of a breast by performing a plurality of X-ray irradiation while arcuately moving.SOLUTION: A mammographic apparatus includes: a radiation image detector that detects a mammographic image an X-ray irradiation unit that is provided facing the radiation image detector and emits an X-ray from a plurality of irradiation directions while moving arcuately a detector that detects a thickness of a mammary object to be photographed and a control unit that controls an X-ray dosage to be emitted from in an irradiation direction θ so that the X-ray dosage entering a radiographic image detector 241 according to the irradiation direction θ and a thickness b of the object becomes constant.COPYRIGHT: (C)2013,JPO&INPIT【課題】円弧状に移動しながら複数のX線照射をおこない、より品質の良い行い乳房の断層画像を得るトモシンセシス撮影装置を提供する。【解決手段】乳房の放射線画像を検出する放射線画像検出器と、放射線画像検出に対向して設けられ、円弧状に移動しながら複数の照射方向から放射線を照射する放射線照射部と、乳房の被写体の厚さを検出する検出手段と、照射方向θと被写体の厚さbに応じて、放射線画像検出器241に入射する放射線量が一定になるように照射方向θから照射する放射線量の制御手段を備える。【選択図】図9
