Hi Cyrus,
On Thu, 11 Sep 2008 12:47:40 -0400, Cyrus Raji <[log in to unmask]> wrote:
>Hi All,
>
>A question for Dr. Gaser (though anyone else knowing the answer is welcome
>to chime in!)
>
>When I do longitudinal segmentation in VBM, I get gray matter images that
>are warped (i.e. normalized) but not modulated. Why is modulation not done
>in Dr. Gaser's longitudinal vbm script?
Modulation is intended to correct for the volume changes due to spatial normalization.
However, the normalization parameters for all longitudinal scans of one subjects are the
same (in fact the normalization parameters of the baseline scan are applied to all
subsequent scans).
Regards,
Christian
____________________________________________________________________________
Christian Gaser, Ph.D.
Assistant Professor of Computational Neuroscience
Department of Psychiatry
Friedrich-Schiller-University of Jena
Jahnstrasse 3, D-07743 Jena, Germany
Tel: ++49-3641-934752 Fax: ++49-3641-934755
e-mail: [log in to unmask]
http://dbm.neuro.uni-jena.de
>
>Thank you,
>
>Cyrus
>
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