Patent ID: 7042975
Filing Date: 2006-05-09
Classification: A61B,G06T,H01J

Abstract:
1. A helical cone beam computed tomography imaging apparatus comprising: means for acquiring helical cone beam computed tomography projection data for a volume of interest using a plurality of source trajectory helices that temporally overlap, each source trajectory helix being triggered based on detection of a selected cardiac phase, the selected triggering cardiac phase being different for each helix; means for reconstructing the acquired helical cone beam computed tomography projection data for each helix to generate a corresponding time skewed volume image representation of the volume of interest, the time skewed volume image representations temporally overlapping due to the temporal overlap of the source trajectory helices; means for computing a voxel acquisition time for each voxel for each time skewed volume image representation; and means for computing an interpolated voxel value for each voxel based on values of the voxel in the plurality of image representations and corresponding voxel acquisition times.