PROBLEM TO BE SOLVED: To enable easy detection of positional abnormality of a subject and mitigate a burden on an operator.SOLUTION: An X-ray diagnostic apparatus according to an embodiment includes a setting unit and an abnormality detection unit. The setting unit sets a guide line indicating a placement region for a subject on the basis of a reference picture that is imaged in a state in which no subject is placed on a top plate and includes the top plate in an imaging range. The abnormality detection unit detects positional abnormality of the subject on the basis of the guide line and an imaged picture that is imaged in a state in which the subject is placed on the top plate and includes the top plate in an imaging range.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】被検体の位置異常を容易に検出でき、操作者の負担を軽減すること。【解決手段】実施形態に係るＸ線診断装置は、設定部と、異常検出部と、を有する。設定部は、被検体が天板に載置されていない状態で撮影された、天板を撮影範囲に含んだリファレンス画像に基づいて、被検体の載置領域を示すガイドラインを設定する。異常検出部は、被検体が天板に載置された状態で撮影された、天板を撮影範囲に含んだ撮影画像と、ガイドラインとに基づいて、被検体の位置異常を検出する。【選択図】 図１
