Dear Hillary,
which vbm8 version have you used? The old version r369 had a different longitudinal processing pipeline, which a less stable than the new version r409 (or r413).
Regards,
Christian
____________________________________________________________________________
Christian Gaser, Ph.D.
Departments of Psychiatry and Neurology
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
On Fri, 22 Apr 2011 19:10:17 +0100, Hillary Protas <[log in to unmask]> wrote:
>We have been having problems with the longitudinal VBM8 routine in many of our subjects. The segmentation of many of the individuals does not appear to work as seen in the attached figure. However, the cross sectional VBM preprocessing does produce a satisfactory segmentation (also attached). We have tried to go through the longitudinal VBM8 procedure step by step looking at the results of each module. We have repositioned the baseline and follow-up image so that they were closer to the template. We still cannot figure out exactly why the procedure fails and how to fix it. Has anybody experienced this problem before? Does anybody have a suggestion for us to try?
>
>Thank you!
>
>Hillary Protas
>
>The figure order is as follows:
>
>* vbm8 longitudinal GUI
>
> Template
> wmrmean (mean image)
> bsl
> m12
> bsl-wp1mr(warped grey matter)
> bsl-wp2mr(warped white matter)
> m12-wp1mr(warped grey matter)
> m12-wp2mr(warped white matter)
>
>*bsl cross-sectional vbm8
>
> Template
> bsl
> bsl-p1(grey matter)
> bsl-p2(white matter)
> bsl-wrp1(warped grey matter)
> bsl-wrp2(warped white matter)
>
>
>
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