> I have tried using Dartel in a sample of Parkinson's disease patients. The
> results seem to come out less significative compared with the normal VBM
> procedure. I would like to ask you if Dartel has some additional tools that
> can improve results in this particular kind of patients. If not, what would
> be the explanation for these results? Is it possible that the normal VBM
> is more appropriate than Dartel for some cases or diseases?
This is a little surprising. How does the Template_6.nii file appear? Is
there any indication that something may have gone wrong? The first volume in
the file should be a fairly crisp grey matter average. The second should be
a white matter average. There is one instance that I have heard of where
DARTEL didn't seem to work, and that is where the user aligned all the GM and
WM with the average of the GM and WM - rather than all the GM with the
average of the GM and all the WM with the average WM.