Thank you both for the help! While I was reading Simon’s PhD student’s thesis I realized that stripes in my sinogram are actually horizontal and not random/pixel specific (rather projection specific). They could represent a shift in gain response by the whole detector (there is an adaptive gain option in the acquisition that I must investigate), as projection by projection there is a tangible inconsistency in the average intensity value (see spikes in attached images as reference).
Again, thank you for your time, hope this might be of interest to you as well. Gabriele Da: Simon Rit <[email protected]> Inviato: giovedì 9 luglio 2020 16.06 A: Samuel Gerber <[email protected]> Cc: [email protected]; rtk-users <[email protected]> Oggetto: Re: [Rtk-users] R: Ring Artifacts correction Excellent! Thanks for sharing. On Thu, Jul 9, 2020 at 3:33 PM Samuel Gerber <[email protected] <mailto:[email protected]> > wrote: This: https://github.com/InsightSoftwareConsortium/ITKRingArtifact might be of interest. Best, Sam On Thu, Jul 9, 2020 at 9:30 AM Simon Rit <[email protected] <mailto:[email protected]> > wrote: Hi Gabriele, There is nothing readily available in RTK, sorry. A PhD student working with me worked on that but using python scripts, see his PhD thesis here <https://www.creatis.insa-lyon.fr/~srit/biblio/pivot2019.pdf> , chapter 7. Simon On Thu, Jul 9, 2020 at 2:57 PM <[email protected] <mailto:[email protected]> > wrote: Dear all, I’m forwarding this email as the original had an image that was blocked from the mailing list due to overall size. Gabriele Da: [email protected] <mailto:[email protected]> <[email protected] <mailto:[email protected]> > Inviato: mercoledì 1 luglio 2020 11.51 A: [email protected] <mailto:[email protected]> Oggetto: Ring Artifacts correction Dear Rtk users and developers, I have a set of projections that suffer both from truncation and ring artifacts. While for the first issue I’ve been fiddling with the --pad option to a satisfying result, I’m unsure what would be the best way to deal with the ring artifacts in RTK. I’ll attach a screenshot of the sinogram showing evident strikes and an animated gif with the resulting reconstruction highlighting the concentric rings. Thanks in advance for your help and input! Gabriele Belotti _______________________________________________ Rtk-users mailing list [email protected] <mailto:[email protected]> https://public.kitware.com/mailman/listinfo/rtk-users _______________________________________________ Rtk-users mailing list [email protected] <mailto:[email protected]> https://public.kitware.com/mailman/listinfo/rtk-users -- Samuel Gerber R&D Engineer Kitware, Inc.
_______________________________________________ Rtk-users mailing list [email protected] https://public.kitware.com/mailman/listinfo/rtk-users
