Hi, I don't have much experience with ADMM. However, in my experience with the conjugate gradient algorithm, it's worth weighting the least squares cost function with the redundancies at the center. This has been documented by others, see e.g. https://doi.org/10.1088/0031-9155/58/2/205 This seems to be implemented in ADMM as well, have you tried to set DisableDisplacedDetectorFilter to true? Simon
On Fri, Oct 11, 2019 at 9:00 AM Korte James <[email protected]> wrote: > Hi, > > > > I am having issues with an artifact (black hole in the centre) in my ADMM > reconstructions when using an offset detector. I have tested the same > projection set and geometry file with the FDK algorithm and the > reconstruction is fine. > > > > I’ve previously been using the same workflow with a centred detector, with > no issues, for both the FDK and ADMM reconstruction methods. > > > > Are there any known issues/common pitfalls with the ADMM implementation > and detector offsets? > > > > Cheers, > > James > > *Disclaimer:* This email (including any attachments or links) may contain > confidential and/or legally privileged information and is intended only to > be read or used by the addressee. If you are not the intended addressee, > any use, distribution, disclosure or copying of this email is strictly > prohibited. Confidentiality and legal privilege attached to this email > (including any attachments) are not waived or lost by reason of its > mistaken delivery to you. If you have received this email in error, please > delete it and notify us immediately by telephone or email. Peter MacCallum > Cancer Centre provides no guarantee that this transmission is free of virus > or that it has not been intercepted or altered and will not be liable for > any delay in its receipt. > _______________________________________________ > Rtk-users mailing list > [email protected] > https://public.kitware.com/mailman/listinfo/rtk-users >
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