Hi - no, we can do this - the program is "vecreg" and can take in
either vectors or tensors, and can apply either FLIRT affine matrices
or FNIRT warp fields.
Cheers.
On 13 Nov 2008, at 22:34, Gwenaëlle DOUAUD wrote:
> Hi,
>
> yes, the idea is that you're dealing here with _vectors_ so 3D
> entities, not scalar ones (hence the 28x3 when you split it, each V1
> map being 4D with 3 components corresponding to the x, y and z
> projections of V1 on the 4th dimension)... I don't think you can use
> tbss_non_FA on those maps as we can't apply fnirt warpfield to
> vectors yet (Saad/Steve, am I right?).
>
> Hope this helps,
> Gwenaëlle
>
>
> --- En date de : Jeu 13.11.08, Juergen Haenggi <[log in to unmask]
> > a écrit :
>
>> De: Juergen Haenggi <[log in to unmask]>
>> Objet: [FSL] Tbss_non_FA and eigenvectors
>> À: [log in to unmask]
>> Date: Jeudi 13 Novembre 2008, 21h45
>> Dear FSL experts
>>
>> After running tbss_non_FA on the first eigenvector there is
>> a file in the
>> stats folder called all_V1.nii.gz that is three times
>> larger in size than
>> the other files derived from the same kind of analysis (MD,
>> L1, L2, L3).
>> When using fslsplit in order to do statistics elsewhere,
>> there are "84
>> subjects" (individual files) although only 28 subjects
>> were included in the
>> initial FA analysis. When I split up the file
>> all_L1.nii.gz, there are 28
>> subjects.
>> The same is also true for all_V2.nii.gz and V3.nii.gz.
>>
>> Any idea?
>>
>> Thanks in advance
>> Regards
>> Juergen
>>
>> -----------------------------------------------------------
>> Juergen Haenggi
>> Ph.D. (Dr. des.)
>> Division of Neuropsychology
>> Institute of Psychology
>> University of Zurich
>> Binzmuehlestrasse 14, PO Box 25
>> 8050 Zurich, Switzerland
>> 0041 44 635 73 97 (phone office)
>> 0041 76 445 86 84 (phone mobile)
>> 0041 44 635 74 09 (fax office)
>> BIN 4.D.04 (office room number)
>> [log in to unmask] (email)
>> http://www.psychologie.uzh.ch/neuropsy/ (website)
>> http://www.juergenhaenggi.ch (private website)
>> -----------------------------------------------------------
>
>
>
>
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Stephen M. Smith, Professor of Biomedical Engineering
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