Hi Yannick, Yes, that's correct. It should not be too difficult to implement, at least on the CPU, now that we have iterators with the geometry <https://github.com/SimonRit/RTK/blob/master/code/rtkProjectionsRegionConstIteratorRayBased.h>, but I still haven't done it. In practice, I do a pseudo parallel geometry when I need one by setting a large distance between the source and the detector. I'll post a message on the mailing list when the real parallel geometry is implemented. Simon
On Tue, Jun 20, 2017 at 3:08 PM, Yannick BOURSIER <bours...@cppm.in2p3.fr> wrote: > Hi all, > > In an old archive (March 2013), it was announced that only rtkfdk was > working correctly with a parallel beam geometry (defined by artificially > setting the SourceToDetectorDistance to 0.). > > It seems that it is still not possible to execute forward and backward > projections with such a geometry, is it true, or did I miss something ? > I've just checked all the archives without finding any clue about that > problem. > Could you help me please ? > > Thanks in advance, > Best > Yannick Boursier > _______________________________________________ > Rtk-users mailing list > Rtk-users@public.kitware.com > http://public.kitware.com/mailman/listinfo/rtk-users >
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