Method for helical scanning with a stationary detector using reb

Details Method for helical scanning with a stationary detector using reb Method for helical scanning with a stationary detector using reb

1989-11-22

1993-05-04

Envall, Jr., Roy N.

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36441315, G06F 1500

Patent

active

052087468

ABSTRACT:
A method of reducing image helical scanning artifacts in fourth generation computed tomography imaging systems, rebins 360.degree. of projection data into two half scans. The data of the half scans is spliced so as to create 360.degree. 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.

REFERENCES:
patent: 4284896 (1981-08-01), Stonestrom
patent: 4630202 (1986-12-01), Mori
patent: 4789929 (1988-12-01), Nishimura et al.
patent: 5073911 (1991-12-01), Ozaki et al.

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