Hi - I would not recommend doing this - I would not interpolate the
raw diffusion data before running dtifit, as you will lose resolution.
You can apply transformations to the output of dtifit later if needed,
and doing it this way you won't need to worry about adjusting the bvecs.
Cheers, Steve.
On 9 Oct 2008, at 17:18, Brittany Howell wrote:
> I have aligned all of our subjects' T1 images to the AC-PC line
> using AFNI
> after de-obliquing the images. Then if you deoblique the DWI and
> apply the
> AC-PC alignment (from the T1 header) you get a really good alignment
> of the
> DWI to the T1 (in AC-PC alignment)- and also after reorientation. So
> now I
> have these aligned images (in AFNI format), but now the bvecs files
> need to
> be adjusted to match (deobliqued and orientaiton corrected). I don't
> know
> how to apply, or in what order, or how to verify that I have done it
> correctly these transformations. Any suggestions? The point is to
> keep the
> images in this alignment, but then do all of the DWI processing in
> FSL.
>
> Thanks!
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR 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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