PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus configured to reconstruct an image in a required cardiac phase zone and to dissolve the useless exposure dose of a subject.SOLUTION: In the X-ray CT apparatus having an electrocardiographic synchronous scan function for acquiring the tomographic image of a subject in the required cardiac phase zone on the basis of pulsation data acquired from the subject, the X-ray CT apparatus includes a control unit for specifying or predicting the cardiac phase of the subject during electrocardiographic synchronous scanning on the basis of the pulsation data acquired beforehand prior to the electrocardiographic synchronous scanning and controlling the timing of the start and stop of the scanning so as to obtain the tomographic image in the required cardiac phase zone.COPYRIGHT: (C)2011,JPO&INPIT【課題】所要の心位相区間で画像再構成を行えるとともに、被検体の無駄な被ばく線量を解消できる。【解決手段】本発明では、被検体から取得される拍動データに基づき、所要の心位相区間で被検体の断層画像を取得する心電同期スキャン機能を備えたX線CT装置において、心電同期スキャンに先立って予め取得された拍動データに基づき、心電同期スキャン時の被検体の心位相を特定し又は予測し、所要の心位相区間で断層画像が得られるようにスキャンの開始と停止のタイミング制御を行う制御部を備えるようにしたこと。【選択図】 図3
