Image reconstruction for a ct system implementing a dual fan beam helical scan

摘要

The present invention, in one form, is an apparatus for performing image reconstruction using data obtained by a dual beam helical scan. In reconstructing an image in accordance with the present invention, projection data from each fan beam measurement is weighted by weighting factors to obtain a reconstructed slice. The data arrays selected and weighting factors applied vary depending on the table speed and the detector spacing measured at the axis of gantry rotation, i.e., the detector z spacing.