PROBLEM TO BE SOLVED: To make it possible to detect a subject's body motion at the time of X-ray photography to implement at least one of reduction in unnecessary exposure of the subject and improvement of throughput.SOLUTION: A mammography apparatus according to an embodiment comprises an X-ray tube, an X-ray detector, a photography platform, a compression plate, and contact detection parts. The X-ray tube generates an X-ray. The X-ray detector detects the X-ray generated by the X-ray tube. On the photography platform is placed the subject's mamma. The compression plate is provided so as to face the photography platform and compress the subject's mamma placed on the photography platform between the compression plate and the photography platform. The contact detection parts are arranged in a direction of a width of at least one of the photography platform and the compression plate, in which the subject's chest wall is to come into contact with the at least one, to detect contact of the chest wall.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】Ｘ線撮影時における被検体の体動を検出でき、被検体に対する不要な被ばくの低減及びスループットの向上のうち少なくとも一方を実現する。【解決手段】実施形態に係るマンモグラフィ装置は、Ｘ線管と、Ｘ線検出器と、撮影台と、圧迫板と、接触検出部と、を備える。Ｘ線管は、Ｘ線を発生させる。Ｘ線検出器は、Ｘ線管により発生されたＸ線を検出する。撮影台は、被検体の乳房が載置される。圧迫板は、撮影台に対向して設けられ、撮影台に載置された被検体の乳房を撮影台との間で圧迫する。接触検出部は、撮影台および圧迫板の少なくとも一方の被検体の胸壁が接触する幅方向に複数並べて設けられ、胸壁の接触を検出する。【選択図】 図１
