Hi - SPM and FSL currently use slightly different conventions for the
origin (both being deviations from the original analyze standard) so the
best thing to do, given that FAST ignores the origin anyway, is just to
copy the header info back after running it, using avwcpgeom.
Cheers.
ps - we'll all be consistent once we all switch to NIFTI-1 !
On Thu, 1 Apr 2004, Marenco, Stefano (NIH/NIMH) wrote:
> Hi, I am using segmentation tools in FSL and then bringing back the images
> to spm. One thing I notice is that the origin changes. The images are
> 128x128x72 or 128x128x78 and I start from an origin of 64x64x36. After I
> segment in fsl and view the resulting volume in spm again, I get a origin of
> 64.5x64.5x36.5 or 64.5x64.5x39.5, depending on whether the imagehas 72 or 78
> slices, respectively. How come?
>
>
>
> Stefano Marenco, MD
>
> Senior Staff Fellow
>
> Clinical Brain Disorders Branch
>
> NIMH
>
> 10 Center Drive, room 4S235
>
> Bethesda, MD 20817
>
> tel. (301) 435-8964
>
> fax. (301) 480-7795
>
> email: <mailto:[log in to unmask]> [log in to unmask]
>
>
>
>
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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