PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus capable of properly controlling the rotation of a rotary disk during contrast examination.SOLUTION: The X-ray CT apparatus according to the present invention comprises: an X-ray source for projecting X rays onto a subject an X-ray detector for detecting the X rays transmitted through the subject and a rotary disk having the X-ray source and the X-ray detector mounted thereon and rotating about the subject. The X-ray CT apparatus further comprises: a monitoring unit for monitoring the state of a contrast agent injection device which injects a contrast agent or physiological saline into the subject and a control unit for controlling the rotation of the rotary disk in response to the state of the contrast agent injection device.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】 造影検査時に回転円盤の回転を適切に制御可能なX線CT装置を提供する。【解決手段】 本発明は、被検体にX線を照射するX線源と、前記被検体を透過したX線を検出するX線検出器と、前記X線源と前記X線検出器を搭載し、前記被検体の周囲を回転する回転円盤とを備えるX線CT装置であって、造影剤または生理食塩水を被検体に注入する造影剤注入装置の状態を監視する監視部と、前記造影剤注入装置の状態に応じて前記回転円盤の回転を制御する制御部と、を備えることを特徴とする。【選択図】 図3