Hi Simon, Thank you very much for your quick response. As suggested, I have refined the Ankle Dicom data so that everything outside the leg part is at 0. I got a fine projection 'Ankle.mha' after doing that. However, I didn't get much effect when I reconstructed it using rtkfdk. I understand that projecting and reconstructing a CT image will necessarily result in a loss of quality due to the multiple interpolations. But I doubt, maybe something I am missing here can make it better. Could you have a look at it, please?
I used the following command for reconstruction. *rtkfdk -g geometry.xml -o Output.mha -p . -r Ankle.mha --dimension 512,512,245 --hardware cuda --hann 0.4 --hannY 0.4* Ankle.mha <https://drive.google.com/file/d/1M5hey85gQhh_gCC1dEvvr_EsXkRAOWm3/view?usp=drive_web> AnkleDICOM.mha <https://drive.google.com/file/d/14qcXeN3IL_qHT3IbiJfMaQrTIPIPu81v/view?usp=drive_web> geoemtry.xml <https://drive.google.com/file/d/105dwnd8dqgeE2d0qz9I9FPzH1t5b2gcc/view?usp=drive_web> output.mha <https://drive.google.com/file/d/11COT9G6jzrHALPvUs8N4jnnZt9kuIMd3/view?usp=drive_web> Regards, Sreejith On Tue, Sep 20, 2022 at 12:44 PM Simon Rit <simon....@creatis.insa-lyon.fr> wrote: > Hi, > Your projections in Ankle.mha display a very large value in air. To start > with, I would make sure that everything outside the leg is at about 0 in > your original Ankle CT data. > Note that projecting and reconstructing a CT image will necessarily result > in a loss of quality due to the multiple interpolations (during projection > and backprojection). I would suggest to use fine pixels in the projections > (e.g. --spacing .25) which you can bin during reconstruction (--binning > 4,4). > Simon > > On Mon, Sep 19, 2022 at 6:06 PM Sreejith P P <sreejithputhe...@gmail.com> > wrote: > >> Hi, >> >> I have created projections from 'Ankle' CT data using RTK (cuda >> projection filter). It looks good to me. >> After that, I tried rtkfdk application to reconstruct it. >> I used the following command and got the attached output. >> >> *rtkfdk -g geometry.xml -o Output.mha -p . -r Ankle.mha --dimension >> 512,512,245 --hardware cuda --pad 1.0 --hann 0.4 --hannY 0.4* >> >> Am I doing it correctly? If yes, I would like to know what I can do to >> improve the result. >> >> Ankle.mha >> <https://drive.google.com/file/d/10ybESn9HoU9_LYDgaLUNYIf2BzTarQij/view?usp=drive_web> >> geometry.xml >> <https://drive.google.com/file/d/1cTlvPld3iRNiRUW8HmnF29i_j6AmzaPW/view?usp=drive_web> >> Output.mha >> <https://drive.google.com/file/d/1iI9V9TUIAKUMyfe-w6TTzFzS0DzvaGyn/view?usp=drive_web> >> >> _______________________________________________ >> Rtk-users mailing list >> Rtk-users@public.kitware.com >> https://public.kitware.com/cgi-bin/mailman/listinfo/rtk-users >> >
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