If the t-map is across subjects (e.g., two sample t-test across groups; paired t-test of several subjects at different time points), then there is no reason to use one subject's cerebellum as a mapping substrate over another's. Use the Colin cerebellar surface that already exists in some SPM flavors -- or Joern Diedrichsen's SUIT version, if that makes more sense.
But if you are mapping several sessions all from the same subject, then it really would make sense to use that subject's cerebellar surface. Unfortunately, I know of no software that can do that. The resolution is usually not there. David used SureFit (now in Caret) to reconstruct Colin's cerebellar surface, but it took him forever, and you don't typically have the mean of 27 scans at 0.5mm resolution available. It's the difference between mapping individual and group results. Since we have no population average cerebellar surface, use colin for that purpose. > Dear Caret users, > > I was wondering whether I could use Caret to reconstruct cerebellar > surfaces and then map volumes to cerebellar surfaces (to show cerebellar > gray matter atrophy using SPM T maps). Cerebellum is automatically removed > each time I try to reconstruct a new surface in Caret. > > Thanks in advance for your help! > > All the best, > Arman > > _______________________________________________ > caret-users mailing list > [email protected] > http://brainvis.wustl.edu/mailman/listinfo/caret-users > _______________________________________________ caret-users mailing list [email protected] http://brainvis.wustl.edu/mailman/listinfo/caret-users
