X-ray CT apparatus

An X-ray CT apparatus, comprising:

• at least one X-ray irradiation source configured to irradiate X-rays to a volume of interest;
• at least one X-ray detector including a plurality of detection element segments configured to detect the X-rays penetrated through the volume of interest;
• at least one collimator configured to create an opening that is movable at least in a slice direction and a channel direction;
• at least one image processing part configured to generate volume data from the detected X-rays and to extract a portion of the volume data corresponding to the volume of interest;
• at least one reconstruction part configured to reconstruct image data based on data collected by a second scan,
• wherein the at least one collimator comprises,
• a plurality of movable collimator blades configured to create the opening, and
• a plurality of auxiliary blades configured to create a slit corresponding to detection element segments other than detection element segments corresponding to the opening.

An X-ray CT apparatus, comprising:

• at least one X-ray irradiation source configured to irradiate X-rays to a volume of interest;
• at least one collimator including a first opening configured to transmit the X-rays and a second opening that is more distant than the first opening from a center of the X-rays in both slice and channel directions;
• at least one X-ray detector including a plurality of detection element segments configured to detect the X-rays that pass through at least one of the first opening and the second opening and that penetrate through the volume of interest;
• and
• at least one reconstruction part configured to reconstruct image data based on data collected using the X-rays detected by the at least one X-ray detector.