PROBLEM TO BE SOLVED: To provide an X-ray imaging apparatus with a simple structure, capable of appropriately performing auto exposure control and appropriately performing X-ray imaging control.SOLUTION: An X-ray imaging apparatus, when a plurality of AEC lighting fields for auto exposure exist, detects the existence of an AEC lighting field having a sensitivity area whose all part is not included in an X-ray irradiation area VI, on the basis of positional information on the X-ray irradiation area VI and the AEC lighting fields sensitivity areas. When one or more AEC lighting fields not completely included in the X-ray irradiation area VI exist, these AEC lighting fields are set to be unused. For example, when only an AEC lighting field VR has a sensitivity area whose part is not included in the X-ray irradiation area VI, the AEC lighting field VR is set to be unused. Thereby, the X-ray imaging apparatus can appropriately perform auto exposure control and appropriately perform X-ray imaging control, with a simple structure.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2016,JPO&INPIT【課題】簡易な構造で、自動露出制御を適切に行い、X線撮影制御を適切に行うことができるX線撮影装置を提供する。【解決手段】自動露出のためのAEC採光野が複数存在する場合において、X線照射領域VIおよびAEC採光野の感度領域の位置情報に基づいて、感度領域の全ての領域がX線照射領域VIに含まれないAEC採光野の有無を検出する。そして、X線照射領域VIに含まれない当該AEC採光野が1つ以上存在する場合、該当するAEC採光野を未使用に設定する。例えば、AEC採光野VRのみ感度領域の一部がX線照射領域VIに含まれない場合には、当該AEC採光野VRを未使用に設定する。その結果、簡易な構造で、自動露出制御を適切に行い、X線撮影制御を適切に行うことができる。【選択図】図4
