Image reconstruction method for computer tomographs

摘要

Images are reconstructed from complementary folders obtained from the measured direct radiation folders and their re-projection. Complementary beams are obtained for each projection angle between 0 and 2 pi by calculating the indices of the corresp. direct radiation and subsequently interpolating between adjacent beams with whole numbers. All the complementary beams are unsorted into the so-called complementary folders, and the z-focus positions are determined for direct and virtual focus. The inclination angle of the beams w.r.t. a plane vertical to the z-axis is also determined. The direct and complementary folders are weighted. The position in a folder is determined for each voxel. Direct and complementary projections are used for the back projection.