vtkNIFTIImageReader ignores vtkImageData origin.
Write vtkImageData with non-zero origin using vtkNIFTIImageWriter. read it back with vtkNIFTIImageReader, read back image has origin at 0.,0.,0.
Write vtkImageData with non-zero origin using vtkNIFTIImageWriter. read it back with vtkNIFTIImageReader, read back image has origin at 0.,0.,0.