Patent ID: 7260175

Claim:
A CT image producing method comprising the steps of: collecting first axial scan data while rotating at least one of an X-ray tube and a multi-row detector relative to and around a subject to be imaged at a first position in a direction of a body axis of the subject to be imaged; extracting from said first axial scan data projection data corresponding to a plurality of reconstruction fields arranged in the direction of the body axis of the subject to be imaged; if part of projection data of a reconstruction field near an end of said multi-row detector cannot be extracted from said first axial scan data, collecting second axial scan data while rotating at least one of said X-ray tube and multi-row detector relative to and around the subject to be imaged at a second position to which said X-ray tube and multi-row detector are rectilinearly moved relative to the subject to be imaged from said first position toward the end of said multi-row detector; extracting from said second axial scan data the projection data that could not be extracted from said first axial scan data of the reconstruction field near the end of said multi-row detector; and producing one CT image based on said extracted projection data of the reconstruction fields.