Fourth generation helical scanning

Details Fourth generation helical scanning Fourth generation helical scanning

A - Human Necessities

61

B

358/11.1

A61B 6/03 (2006.01) G06T 11/00 (2006.01)

Patent

CA 2021621

15CT 3393 FOURTH GENERATION HELICAL SCANNING Abstract of the Disclosure A method of reducing image helical scanning artifacts in fourth generation computed tomography imaging systems, rebins 360° of projection data into two half scans. The data of the half scans is spliced so as to create 360° 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 functions are feathered with a cubic function to remove weighting induced image artifacts.

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