[vtkusers] Correct anatomical orientation of volumes from Niftii and DICOM

[ochampao]

Hi David.

Thanks for the detailed reply. It's clear I need to familirize myself more
with the two formats.

I have a few follow-up questions:

1) I understand that we need to look into the information stored in each
file to determine how to position and orient the volume. What is not clear
to me is how much of this is done by the readers themselves. Are there some
rules/conventions/logic that each reader follows when orienting and
positioning the reconstructed volume in vtk's world coordinate system? Can
we make some assumptions about the reconstructed volume (vtkImageData)
generated by the reader?

2) Let's put Niftii on the side for a moment. With in my code above the same
volume appears with it's x and y axes reversed when using vtkGDCMImageReader
(loadDicomGDCM()) compared to when using vtkDICOMImageReader (loadDicom())?
How can I ensure the correct volume orientation (or equivalently the correct
camera perspective)?


Panos.



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