Patent ID: 7933376

Claim:
An X-ray CT system having an X-ray tube that irradiates a subject with an X-ray to capture a cross-sectional image of the subject placed on a bed, the X-ray CT system comprising: an image storage configured to store a previous image containing previous three-dimensional volume data of the subject; a capturing part including an X-ray tube irradiating with an X-ray, and a detector configured to capture an X-ray transmission image of the subject; a measuring part configured to measure an amount of displacement between images of the subject shown in the previous image and the X-ray transmission image; an inputting part for setting a scanning region; a display controller configured to control so as to display position mark information representing the scanning region on an image based on the three-dimensional volume data in response to an input to the inputting part; and a scanning controller configured to control the capturing part to move relative positions of the X-ray tube and the subject by using the amount of displacement to correct the displacement so that the image based on the three-dimensional volume data is captured within the scanning region after the correction, to capture the cross-sectional image.