CT image reconstruction method, CT image reconstruction device, and CT system

摘要

The present invention provides a CT image reconstruction method, a CT image reconstruction device, and a CT system that reduce motion artifacts in a CT image when an object moves. A CT image reconstruction method for reconstructing a CT image based on projection data acquired by scanning with X-rays includes a moving object position detecting step for detecting a position of a moving object in the CT image, and the position of the moving object. A partial angle selecting step of selecting a viewpoint and an angle range, selecting partial angle data in the projection data based on the viewpoint and the angle range, and generating a partial angle constraint based on the partial angle data And an iterative reconstruction step of generating a CT image by iterative reconstruction using the partial angle constraint. Thereby, the time resolution in the CT image of the moving object can be improved and the movement artifact can be reduced. Note) The selection diagram is shown in Fig. 2.