Hi Juergen,

we do have tools for this but have never really formalized it since we've always found this analysis to be too fraught with ambiguity to pursue. If you feel like messing around with it you can use mri_extract_label to copy (and smooth/transform) a label from the aseg (e.g. 17=Left Hippocampus), then run that through fsl/spm if you want.

cheers, Bruce On Thu, 9 Oct 2008, Juergen Haenggi wrote:

Dear FS experts

I am wondering whether it is possible to do an voxel-wise analysis on the subcortical segmentations similar to a voxel-based morphometry (VBM) in SPM or FSL. Because there is no .mgz file that encodes the probability that a particular voxel belongs to a particular tissue type (GM or WM) in the mri folder of the subject, I guess that it is not possible (yet), right?

Any advise is appreciated Regards Juergen

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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) j.haenggi@psychologie.uzh.ch (email) http://www.psychologie.uzh.ch/neuropsy/ (website) http://www.juergenhaenggi.ch (private website)

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