CT IMAGE CREATING METHOD AND X-RAY CT EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To create a CT image of a desired time phase with a suppressed cone beam artifact by scanning a periodically moving imaging object using a multidetector. SOLUTION: Projection data which are formed by rotating a X-ray tube 21 and a multidetector 24 around the periodically moving imaging object, scanning the object over a plurality of periods while linearly moving a table 12 mounted with the imaging object and collecting a same time phase region in the plurality of periods; and the projection data of projection points formed by projecting pixels on a reconstruction surface to the multidetector surface in the X-ray transmission direction are extracted: and the CT image is created based on the extracted projection data. This method can improve a time resolution and the image quality. COPYRIGHT: (C)2005,JPO&NCIPI