[Rtk-users] Reconstructing from TrueBeam data

[Korte James]

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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