Hi Antonios,
absolutely. The only thing that is required is to present the data as if they'd been processed in the right order...
If, say, you've named your various brain extracted exams: exam00X_brain.nii.gz, then after running tbss_1_preproc, you'll have in your FAi/ directory all your images called exam00X_brain_FAi.hdr and .img.
So you then just need to rename them exam00X_FAi_brain.hdr and .img.
One additional requirement (for nomenclature purposes) is that you need to have in your FAi/ directory corresponding files *without* the _brain suffix, so in this case: exam00X_FAi.hdr and .img (no matter what they are, so for you, empty files would just be fine: touch exam00X_FAi.hdr and .img).
Hope this makes sense,
Gwenaelle
--- En date de : Lun 21.7.08, Antonios - Constantine Thanellas <[log in to unmask]> a écrit :
> De: Antonios - Constantine Thanellas <[log in to unmask]>
> Objet: [FSL] following different order on VBM analysis steps
> À: [log in to unmask]
> Date: Lundi 21 Juillet 2008, 12h23
> Dear fsl users,
>
> I want to analyse my data (controls-patients) using
> fsl's VBM.
>
> All my data (whole heads) have been brain extracted with
> BET beforehand in
> another analysis part.
>
> So instead of "beting" my data again (2nd step of
> VBM analysis) can i just
> modify the already extracted brains with tbss_1_preproc
> (1st step of VBM
> analysis) and omit the second step?
>
> Thank you in advance
> Antonios-Konstantinos Thanellas
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