Hi, This is not possible in RTK, the forward projections are just the line integral of a given voxelized volume. In the Joseph forward projection <https://github.com/SimonRit/RTK/blob/master/include/rtkJosephForwardProjectionImageFilter.h#L170>, there is a number of templated functors that can be changed to use a spectrum. They have been developed for Gate, see here <https://opengate.readthedocs.io/en/latest/tools_to_interact_with_the_simulation_actors.html#fixed-forced-detection-ct>. There, you can pass a full source spectrum to compute DRRs. Simon
On Sat, Apr 18, 2020 at 8:21 PM Isuru Suranga Wijesinghe < isurusuranga.wijesin...@gmail.com> wrote: > Hi, > > I’m currently working on generating DRR image from 3D CT volumes. > Is there a way to configure beam characteristics such as filtration ? > That is for an example we use a 120kVp beam, and the filtration is given > as 16.25mmAl at 120kVp. Does RTK versions has two parameters to keep these > two values (120 kVp and 16.25mmAl) > > Thanks and Best Regards, > Isuru > _______________________________________________ > Rtk-users mailing list > Rtk-users@public.kitware.com > https://public.kitware.com/mailman/listinfo/rtk-users >
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