Re: [Rtk-users] Reconstruction Artifact

I tried and I could not understand what you've done in your code. Enclosed is what I would use which gives a more reasonable result but which is full of cone-beam artefacts (I think). On Wed, Jun 3, 2020 at 7:59 PM Benjamin W. Maloney < benjamin.w.maloney...@dartmouth.edu> wrote: > Thanks. > > >

Re: [Rtk-users] Reconstruction Artifact

Thanks. https://drive.google.com/drive/folders/1DTREuI80fWrIcBa5LIUfnAzsEPSRvhyZ?usp=sharing At that link are a .tif file for my projections and the .cxx reconstruction file I have been using Some notes about my system: SID: 306.6 mm SDD: 561.3 mm The detector panel is: 230mm x 70mm with a

Re: [Rtk-users] Reconstruction Artifact

Yes, that's allowed, other people did it before. On Wed, Jun 3, 2020 at 6:28 PM Benjamin W. Maloney < benjamin.w.maloney...@dartmouth.edu> wrote: > Hi all, > > Thanks for the help! > I'll be sure to make sure my preprocessed data is handled correctly. > > The reconstruction is meant to be a

Re: [Rtk-users] Reconstruction Artifact

Hi all, Thanks for the help! I'll be sure to make sure my preprocessed data is handled correctly. The reconstruction is meant to be a square, it is of a CIRS ACR digital mammography phantom I'm trying to send an example of my data but I can't get it under 147 MB data limit, is there a

Re: [Rtk-users] Reconstruction Artifact

If your projections record the number of X-ray photon counts instead of attenuation, an I0 must be set correctly and a logarithmic operation is needed before the projection data can be fed to the reconstruction loop. Both the I0 and the logarithmic operation can be handled by the RTK projection

Re: [Rtk-users] Reconstruction Artifact

Yes, there is no such limitation as far as I know, you can use negative numbers and value above 1. Your result is really strange, it it supposed to be a square? I don't know what is the problem but that's clearly a geometry issue. We can always have a look if you're able to share some data. Simon

Re: [Rtk-users] Reconstruction Artifact

I don't think there are any restrictions technically. You should be able to use negative values, as the main arithmetic is just a sum and a multiplication