Helical scan computed tomography.

摘要

A method of reducing image helical scanning artifacts in fourth generation computed tomography imaging systems, rebins 360 DEG of projection data into two half scans. The data of the half scans is spliced so as to create 360 DEG of contiguous detector vertex projections. A weighting function is applied to the two half scans and they are reconstructed to an image per conventional reconstruction methods. The weighting functions provide effective interpolation and extrapolation of the half scan data to a slice plane centered in the projection data. In one embodiment, the weighting functiors are feathered with a cubic function to remove weighting induced image artifacts. Apparatus for carrying out the method is disclosed.