Dynamic computed tomography imaging using positional state modeling

摘要

An apparatus for computed tomography (CT) imaging of a cyclically moving organ includes a positional state monitor ( 24, 40 ) that monitors a positional state of the cyclically moving organ such as the heart. A cone-beam CT scanner ( 10 ) acquires image data at least within a plurality of time windows. Each time window is centered about an occurrence of a selected positional state of the organ. A window analyzer ( 38 ) selects a data segment within each time window such that the data segments combine to form a complete data set covering a selected angular range. A reconstruction processor ( 44 ) reconstructs the selected data segments into an image representation.