PROBLEM TO BE SOLVED: To provide a technique capable of maintaining a tomographic angle of a certain value or more for photographing a tomographic image without simultaneously operating an X-ray apparatus or a two-dimensional detector at the time of photographing.SOLUTION: An X-ray photographing apparatus comprises: an X-ray source with a multiple of X-ray foci an X-ray detector for detecting the X rays emitted from the X-ray foci and transmitted through a subject control means for controlling the X-ray source and the X-ray detector selection means which selects the sets of X-ray foci having intersection angles of the emitted X rays in a region of interest of the subject matching a predetermined angle, from among the X-ray foci which can, of the plurality of X-ray foci, pass through a photographing region, i.e. the region of interest, and project an image on the X-ray detector and determination means for determining the X-ray foci to be used for photographing, from among the X-ray foci interposed between sets of X-ray foci selected by the selection means. In the X-ray photographing apparatus, the control means causes the X-ray foci selected by the selection means to emit X rays and also causes the X-ray detector to detect the transmitted X rays for photographing an X ray image.COPYRIGHT: (C)2014,JPO&INPIT【課題】撮影時にX線装置や2次元検出器を同時に運動させなくても、一定以上の断層角を維持して断層撮影を可能とする技術を提供する。【解決手段】複数のX線焦点を有するX線源と、X線焦点から照射され、被写体を透過したX線を検出するX線検出器と、X線源とX線検出器とを制御する制御手段とを備えるX線撮影装置であって、複数のX線焦点の中で、被写体における撮影部位である関心領域を通過して、X線検出器に像投影が可能なX線焦点のうち、照射したX線の関心領域における交差角度が所定角度と一致するX線焦点の組を選択する選択手段と、選択手段が選択したX線焦点の組に挟まれるX線焦点から、撮影に使用するX線焦点を決定する決定手段とを備え、制御手段は、決定手段が決定したX線焦点からX線を照射させ、X線検出器でX線を検出してX線画像の撮影を行う。【選択図】 図1
