[vtkusers] vtkDICOMImageReader: No Image Orientation (patient) information

[Sebastián Ordás]

Hi all,

vtkDICOMImageReader does not give the Image Orientation, but only the image position.

Is that right? If so, DICOMAppHelper::ImagePositionPatientCallback is already implemented, so this

would be a nice feature to add.

Also, when reading a stack of slices, GetPixelSpacing() does like this: 

if (sortedFiles.size() > 1)
    {
    vtkstd::pair<float, vtkstd::string> p1 = sortedFiles[0];
    vtkstd::pair<float, vtkstd::string> p2 = sortedFiles[1];
    this->DataSpacing[2] = fabs(p1.first - p2.first);
    }
  else
    {
    this->DataSpacing[2] = spacing[2];
    }  

Why?

Best,

Sebastian
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