| 摘要 |
PROBLEM TO BE SOLVED: To produce an image that a display form of an area of non-deteriorated image quality, where projection data are relatively sufficient, is appropriately modified, and to provide the image which facilitates test and interpretation of radiogram, in an X-ray CT scanner having multiseriate X-ray detectors in a direction of body axis. SOLUTION: In the X-ray CT scanner 10, the projection data are collected while an X-ray source emitting an X-ray beam and the X-ray detectors having multiseriate detecting elements along the slicing direction are rotated around a rotational axis, and the CT image is reconstructed by back projection for cone angle of the X-ray beam. The X-ray CT scanner 10 has: an area-calculating part 55 which calculates information related to a position of an area of deteriorated image quality generated near the end of a collection range of the projection data by effects of cone angle, on the basis of a slicing position; an image processor 67 which processes the CT image so as to differentiate the area of deteriorated image quality from the area of non-deteriorated image quality. COPYRIGHT: (C)2008,JPO&INPIT
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