Patent ID: 9299140
Filing Date: 2016-03-29
CPC Classification: A61B,G06T

Claim Text:
1. A method for reconstructing CT image data, including a plurality of image voxels, by way of weighted filtered back-projection (WFPB), the method comprising: receiving detector data, from at least one multi-row detector rotating about an examination object, detector rows of the at least one multi-row detector extending in a direction perpendicular to a system axis of a CT system; calculating convolved projection data from the detector data of adjacent beams, wherein one projection data item of a central beam through the image voxel for each predefined projection angle corresponds to each respective image voxel and wherein a detector row coordinate relative to the detector is allocated to each respective projection data item, which corresponds to a position of the central beam on the detector; and weighting the respective projection data as a function of the detector row coordinate allocated to each respective projection data item, wherein a weight function is used to weight the respective projection data during the filtered back-projection, weighting the projection data of central beams striking a detector row close to the edge of the row relatively less, and weighting the projection data of central beams striking a detector row more centrally relatively more; and reconstructing the CT image data via the WFPB, based upon respective weighted projection data.