PROBLEM TO BE SOLVED: To provide an X-ray image diagnostic device and a control method for the same which can determine a cause for occurrence of a characteristic pixel.SOLUTION: An X-ray image diagnostic device includes: an irradiation part which can irradiate the X-ray under a plurality of irradiation conditions an X-ray detecting part which detects the X-ray irradiated by the irradiation part an image generating part which generates the X-ray image based on the X-ray detected by the X-ray detecting part a characteristic pixel detecting part which detects the characteristic pixel in which the pixel value in the X-ray image is different from other pixel value and a determining part which determines a cause of occurrence of the characteristic pixel based on the changes in the characteristic pixel among the X-ray images generated under the plurality of irradiation conditions.SELECTED DRAWING: Figure 1【課題】特徴画素の発生原因を判別可能なX線画像診断装置、及びX線画像診断装置の制御方法を提供する。【解決手段】本実施形態に係るX線診断装置は、複数の照射条件でX線の照射が可能である照射部と、照射部から照射されたX線を検出するX線検出器と、X線検出器により検出されたX線に基づき、X線画像を生成する画像生成部と、X線画像内の画素値が他の画素値と異なる特徴画素を検出する特徴画素検出部と、複数の照射条件により生成されたX線画像間における特徴画素の変化に基づき、特徴画素の発生原因を判別する判別部と、を備える。【選択図】図1