Patent ID: 8050480

Claim:
A method for generating computed tomography image data of a volume of interest from X-ray CT data sets generated by a computed tomography system during scanning of an examination subject on a helical path rotating around a longitudinal system axis in an infeed direction, the method comprising: performing at least two volume-based reconstructions of the volume of interest by way of differential back-projection over surfaces constituted by different groups of M-lines, followed in each case by an inverse Hilbert transformation, the groups of M-lines for the reconstructions being selected from different of the following M-line subsets: i) a first M-line subset, selected such that a surface constituted by the respective M-lines meets the detector surface completely within a Tam-Danielsson window, ii) a second M-line subset, selected such that a surface constituted by the respective M-lines intersects a detector area before the Tam-Danielsson window in the infeed direction, iii) a third M-line subset, selected such that a surface constituted by the respective M-lines intersects a detector area after the Tam-Danielsson window in the infeed direction; and combining different reconstructed volumes to form a final reconstruction of the volume of interest.