PROBLEM TO BE SOLVED: To reduce an exposure dose in CT fluoroscopy by continuous scanning.SOLUTION: An X-ray CT apparatus according to an embodiment comprises an X-ray tube, an X-ray detector and a control unit. The X-ray tube emits an X-ray. The X-ray detector detects the X-ray that is emitted from the X-ray tube and is transmitted through a subject. The control unit allows the X-ray tube to start the X-ray emission from a point of time when the X-ray tube reaches a preset starting position, in continuously collecting X-ray CT image data by continuously rotating the X-ray tube and the X-ray detector around the subject.COPYRIGHT: (C)2015,JPO&INPIT【課題】連続スキャンによるCT透視における被曝量を低減させること。【解決手段】実施形態のX線CT装置は、X線管と、X線検出器と、制御部とを備える。X線管は、X線を曝射する。X線検出器は、前記X線管から曝射され被検体を透過したX線を検出する。制御部は、前記X線管及び前記X線検出器を前記被検体の周囲で連続回転させてX線CT画像データの連続収集を行なう際に、前記X線管が予め設定された開始位置に到達した時点からX線曝射を開始させる。【選択図】図1
