DARTEL is run as described in the user guide, but there is an extra option
that allows the resulting deformations to be automatically combined with an
additional affine transform. The DARTEL warps encode the inter-subject
variability, and the affine transform warps the average of the population to
MNI space.
Best regards,
-John
On Tuesday 24 March 2009 17:49, Amir Tahmasebi wrote:
> Hi John,
>
> Thanks for your reply.
>
> Does this mean that the fMRI data are only affinely registered between
> subjects?
>
> Regards,
> Amir
>
> John Ashburner wrote:
> > If you have SPM8b (latest updates), then you should find this much
> > easier, as there is now an option to spatially normalise (and spatially
> > blur) fMRI to MNI space (as it incorporates an additional affine mapping
> > between DARTEL template and MNI template). I haven't had a chance to
> > update the user guide for DARTEL yet, but it should be reasonably
> > straightforward to use.
> >
> > I expect that the t stats should be increased, and look forward to any
> > feedback on whether this is the case.
> >
> > Best regards,
> > -John
> >
> > On Tuesday 24 March 2009 16:22, Amir Tahmasebi wrote:
> >> Dear John and SPMers,
> >>
> >> I am trying to use DARTEL for normalization of fMRI data. I have looked
> >> at "how to use DARTEL for normalizing fMRI con maps?" thread but it is
> >> not exactly what I was looking for.
> >>
> >> I was wondering how should I use the outputs of DARTEL ("u_rc1*.nii" and
> >> "Template_6.nii") to normalize my fMRI data which is already
> >> coregistered to the corresponding structural data.
> >>
> >> Thank you,
> >> Amir
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