Hi - there is no interpolation, either in the processing (eg tensor
fitting, etc.) or in display in FSLView. I'm not sure what aspect of
FSLView you are concerned about - but no, there is no interpolation here -
even if you zoom, everything is "nearest neighbour". If you view other
orientations than axial, you still see the raw data.
Cheers, Steve.
On Mon, 24 Oct 2005, Nader S. Metwalli wrote:
> Dear Dr. Behrens and all,
>
> I usually acquire axial diffusion-weighted images and when I open the 4D volume
> in FSLview I realize that FSLview does some interpolation to generate the
> coronal and sagital views, am I correct on that? And the second thing is
> regarding FDT Diffusion DTIFit, does the software calculate the tensors for the
> axial slices up until calculating the FA and then interpolate the axail FA
> values to generate the coronal and sagital views OR does the software calculate
> the tensors for the axial, interpolated sagital and coronal and generates FA
> values for the axial, sagital, and coronal separately? To sum up, are the
> sagital and coronal views generated by interpolating the original
> diffusion-weighted data and then tensor and FA calculation proceeds after that
> or is it the other way around? Thank you.
>
> Nader
>
> --
> Nader S. Metwalli
> Bioengineering PhD student
> The Wallace H. Coulter Department of Biomedical Engineering,
> Georgia Institute of Technology / Emory University,
> Atlanta, GA 30332-0535
> U.S.A.
>
--
Stephen M. Smith DPhil
Associate Director, FMRIB and Analysis Research Coordinator
Oxford University Centre for Functional MRI of the Brain
John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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