PROBLEM TO BE SOLVED: To provide an X-ray image diagnostic apparatus which can present an accurate range where an X-ray image is photographed on a subject.SOLUTION: The X-ray image diagnostic apparatus includes a photographing means for irradiating a subject with X-ray to photograph an X-ray image. The X-ray image diagnostic apparatus further includes: an X-ray tube to emit X-ray, a projector to project light a reflection means to reflect the light projected by the projector toward the emitting direction of the X-ray a collimator to interrupt the light reflected by the reflection means and at least a part of the X-ray an X-ray detector to detect the X-ray a movement means to vary relative position relation between the X-ray tube and the X-ray detector on the basis of movement signals and a liquid crystal element to vary the distribution of light emitted from the projector so that the detection range by the X-ray detector is made visible on the basis of the movement signal.COPYRIGHT: (C)2012,JPO&INPIT【課題】 X線像が撮影される正確な範囲を被検体上に示す。【解決手段】 被検体に対してX線を照射し、X線像を撮影する撮影手段を備えたX線画像診断装置において、X線を照射するX線管と、光を照射する投光器と、前記X線の照射方向へ向けて前記投光器が照射した光を反射する反射手段と、前記反射手段にて反射した光及び前記X線の少なくとも一部を遮るコリメータと、前記X線を検出するX線検出器と、移動信号に基づいて前記X線管と前記X線検出器との相対的な位置関係を変化させる移動手段と、前記移動信号に基づいて、前記X線検出器の検出領域を視認可能なように、前記投光器から照射された光の分布を変化させる液晶素子とを有する。【選択図】 図4
