Reconstruction algorithms in x-ray tomography provide
a user with a set of images. For many scientific problems
these images should be segmented. Ring artifacts are the most
noticeable artifacts which do not allow a scientist to achieve
acceptable segmentation especially in case of noisy input data.
Several ring artifact suppression methods based on theory of
ill-posed problems exist. In this letter the basic ring artifact
suppression algorithm is rewritten as a 1D filter, so it does
not require separate data processing and can be combined with
standard filtering used in filtered backprojection algorithms.