[Rtk-users] Reconstructing from TrueBeam data

[Andreas Andersen]

Hi James,
The probeam and truebeam .xim format should be the same.
 Sometimes the last projection is empty, which could cause problems like
what you see.
Moving, deleting, or just renaming, the last projection should solve that
problem.
Let me know if this works for you.

Best regards
Andreas



On Wed, 8 Aug 2018, 07:31 Korte James, <James.Korte at petermac.org> wrote:

> Hi,
>
>
>
> I’m having some issues reconstructing CBCT data from a Varian TrueBeam
> system.
>
>
>
> Just wondering if I am doing something really stupid? Does RTK support
> imaging data off a TrueBeam system?
>
>
>
> I found a good masters thesis where they modified RTK and pre-processed
> TrueBeam data, but wanted to get some feedback before investing time into a
> custom solution (
> https://open.library.ubc.ca/cIRcle/collections/ubctheses/24/items/1.0167188
> )
>
>
>
> I’ve just been using the RTK command line interface. First creating a
> geometry file using “rtkvarianprobeamgeometry.exe” as the Scan.xml file
> from our TrueBeam data has a very similar structure to the Scan.xml from
> the RTK probeam example:
>
> rtkvarianprobeamgeometry.exe -v -x Scan.xml -o geometry.xml -p
> Acquisitions\763250797\ -r Proj.*.xim
>
>
>
> I then try to reconstruct using the FDK algorithm using the following
> command:
>
> rtkfdk.exe -v -g geometry.xml -o slices.mha -p Acquisitions\763250797\ -r
> Proj.*.xim
>
>
>
> And I get the following error:
>
> Regular expression matches 893 file(s)...
>
> Reading...
>
> ExceptionObject caught with reader->Update() in file c:\path-to-rtk-src\rtk
>
> \applications\rtkfdk\rtkfdk.cxx line 63
>
>
>
> itk::InvalidRequestedRegionError (00000000002FDFF8)
>
> Location: "void __cdecl itk::ImageFileReader<class itk::Image<unsigned
> int,3>,cl
>
> ass itk::DefaultConvertPixelTraits<unsigned int>
> >::EnlargeOutputRequestedRegion
>
> (class itk::DataObject *)"
>
> File:
> c:\path-to-itk-src\src\modules\io\imagebase\include\itkimagefilereader.hxx
>
> Line: 350
>
> Description: ImageIO returns IO region that does not fully contain the
> requested
>
> regionRequested region: ImageRegion (00000000002FDC48)
>
>   Dimension: 3
>
>   Index: [0, 0, 0]
>
>   Size: [1024, 768, 1]
>
> StreamableRegion region: ImageRegion (00000000002FDBF8)
>
>   Dimension: 3
>
>   Index: [0, 0, 0]
>
>   Size: [0, 0, 1]
>
>
>
>
>
> Cheers!
>
> James Korte
>
>
>
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