[Rtk-users] Iterative Reconstruction inputs

[Simon Rit]

Hi Ben,
This should have been fixed since this commit
<https://github.com/SimonRit/RTK/commit/2c8ae75f3d23dd6174f4bf707217e5cfc2b7e799>.
Maybe you can try to upgrade to RTK master?
Otherwise, check the doxygen documentation
<http://www.openrtk.org/Doxygen/classes.html> or you can check here
<https://github.com/SimonRit/RTK/blob/master/include/rtkGgoFunctions.h#L309-L338>
how it's done in the applications.
Simon

On Mon, Jun 8, 2020 at 9:22 PM Benjamin W. Maloney <
Benjamin.W.Maloney.TH at dartmouth.edu> wrote:

> Hi all,
>
> Thanks for the help getting my reconstruction up and running last week
>
> I apologize if I missed something obvious
> I was hoping to use an iterative technique but I'm having trouble getting
> it running
> Is it required to set a forward projection filter?
>
> The relevant code is:
> using FDKGPUType = rtk::CudaIterativeFDKConeBeamReconstructionFilter;
> FDKGPUType::Pointer feldkamp = FDKGPUType::New();
> feldkamp->SetInput(0, constantImageSource2->GetOutput()); //Reconstruction
> Volume
> feldkamp->SetInput(1, reader->GetOutput()); //Projection Images
> feldkamp->SetGeometry(geometry);
>
> I get an error here:
> Exception thrown: read access violation.
> this->m_ForwardProjectionFilter.m_Pointer was nullptr.
> On line 121 of rtkIterativeFDKConeBeamReconstructionFilter.hxx
>
> This looks like it doesn't set a forward projection filter by default. I'm
> struggling a bit to get the format for setting this correct
>
> Thanks for the help!
> Ben
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