PROBLEM TO BE SOLVED: To provide an inexpensive and high-performance X-ray CT scanner capable of reducing the amount of radiation exposure.SOLUTION: This X-ray CT scanner includes: an X-ray source a wedge that is positioned between the X-ray source and a subject, and on which a shield for shielding a portion of the X-rays is formed a wedge drive unit for moving the position of the wedge and a system control unit for controlling the wedge drive unit during a scanning period, and for controlling the position of the wedge.COPYRIGHT: (C)2012,JPO&INPIT【課題】被ばく量を低減可能で、しかも安価で高性能なX線CT装置を提供すること。【解決手段】X線源と、前記X線源と被検体との間に配置され、X線の一部分を遮蔽する遮蔽物が形成されたウエッジと、前記ウエッジの位置を移動させるウエッジ駆動部と、スキャン実行期間中に前記ウエッジ駆動部を制御して、前記ウエッジの位置を制御するシステム制御部と、を有するX線CT装置。【選択図】図1
