Helical scanning computed tomography.

摘要

A method of reducing image helical scanning artifacts in computed tomography imaging systems divides 360 DEG of projection data into two half scans. Separate weighting functions are 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 functions are feathered with a cubic function to remove weighting induced image artifacts. Apparatus for carrying out the method is also disclosed.