Patent ID: 8165264
Filing Date: 2012-04-24
Classification: A61B,G06T

Abstract:
1. A method of processing pre-reconstruction decomposition for fast kv-switching acquisition in dual energy computed tomography (CT), comprising the steps of: switching an X ray tube between a predetermined high energy level and a predetermined low energy level at a predetermined frequency; acquiring dual energy data sets at a predetermined total number of projections per rotation (TPPR); symmetrically matching the dual energy data sets into symmetrically matched pairs of the dual energy data sets, the dual energy data sets including immediately neighboring projections indicated by 0 through n+2, the neighboring projections being alternately acquired at the predetermined high energy level and the predetermined low energy level, wherein the symmetrically matching step includes the symmetrically matched pairs of the projections as being expressed as {0,1} {1,2} {2,3} . . . {n−1,n} {n,n+1}{n+1,n+2}, wherein pairs of the numbers is in the { }'s indicate the above defined immediately neighboring projections; performing pre-reconstruction decomposition on the symmetrically matched pairs of the dual energy data sets to generate a dual energy computed tomography; and displaying the dual energy computed tomography.