 the filtered back-projection density distribution. In at least one example embodiment of the computer-implemented method, calculating the revised filtered back-projection density distribution as the weighted linear combination of the filtered back-projection density distribution and the at least one modified filtered back-projection density distribution includes determining at least one weight for the at least one modified filtered back-projection density distribution. The at least one weight is globally defined or depends on a sub-region of the reconstruction volume. In at least one example embodiment of the computer-implemented method, the at least one weight is determined by way of a volume-domain cost function. 