> After segmenting some structural brain scans (with SPM8, the "old" segmentation), some scans show gray matter probabilities higher than 1.
>
> Should that be possible?
This is common in modulated images, because the probabilities are
adjusted for the amount of deformation during spatial normalization. A
region that has gotten smaller can therefore have values > 1.
Hope this helps!
Best regards,
Jonathan
--
Dr. Jonathan Peelle
Center for Cognitive Neuroscience and
Department of Neurology
University of Pennsylvania
3 West Gates
3400 Spruce Street
Philadelphia, PA 19104
USA
http://jonathanpeelle.net/
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