PROBLEM TO BE SOLVED: To provide a manmmography system for performing tomo-synthesis photographing which realizes the reduction of the exposure dose of a subject.SOLUTION: The manmmography system is equipped with an X-ray tube bulb 2 a high voltage generation part 3 for generating the high voltage to be applied to the X-ray tube bulb 2, an X-ray detection part 5 for detecting transmitted X rays, a support mechanism 4 for supporting the X-ray tube bulb 2 and the X-ray detection part 5 in a movable manner, a photographing control part 8 for controlling the high voltage generation part 3, the X-ray detection part 5 and the support mechanism 4 to repeat X-ray photographing, a condition determining part 12 which determines an X-ray generating condition in the second X-ray photographing on the basis of the output of the X-ray detection part 5 due to the first X-ray photographing and an X-ray generating condition in the X-ray photographing on and after the third X-ray photographing different from the X-ray generating condition of the second X-ray photographing based on the output of the X-ray detection part 5 by the first X-ray photographing and an image forming part 11 for producing the tomographic image data related to the mamma of the subject on the basis of the output of the X-ray detection part 5 collected by repeated X-ray photographing.COPYRIGHT: (C)2008,JPO&INPIT【課題】被検体の被曝線量の低減を実現するトモシンセシス撮影を行うマンモグラフィ装置の提供。【解決手段】X線を発生するX線管球2と、X線管球2に印加するための高電圧を発生する高電圧発生部3と、透過X線を検出するX線検出部5と、X線管球2とX線検出部5とを移動可能に支持する支持機構4と、高電圧発生部3とX線検出部5と支持機構4とを制御してX線撮影を繰り返す撮影制御部8と、1回目のX線撮影によるX線検出部5の出力に基づいて2回目のX線撮影におけるX線発生条件を決定し、1回目のX線撮影によるX線検出部の出力に基づいて2回目のX線撮影のX線発生条件とは相違する3回目以降のX線撮影におけるX線発生条件を決定する条件決定部12と、繰り返されるX線撮影により収集されるX線検出部5の出力に基づいて被検体の乳房に関する断層画像データを発生する画像発生部11とを具備する。【選択図】 図1
