. At least one embodiment is directed to a computer-implemented method of deriving 0D image data of a reconstruction volume from a plurality of 0D projections by way of filtered back-projection comprises receiving a plurality of 0D projections of an imaged object, each 0D projection corresponding to a projection plane; applying a filter to each of the 0D projections to yield filtered 0D projections; and calculating a filtered back-projection density distribution from the filtered 0D projections by way of filtered back-projection. At least one embodiment is directed to a 