Surface area of gyri is under-represented when GM/WM surfaces are used for the calculation. Surface area of sulci is under-represented when pial surfaces are used for the calculation. The cortical midthickness is not biased in this respect.
On 05/17/2010 12:21 PM, R. Matthew Hutchison wrote: > Hi group > > In the tutorial for contour drawing, the contours are drawn "midway > through the cortical thickness that > approximates cortical layer 4". (I attached a picture from the tutorial) > > Why is this done instead of simply following the outer boundary of the > cortex? > > Thank you for the insight, > > Matt Hutchison > > -- > R. Matthew Hutchison, PhD. Candidate > Centre for Functional and Metabolic Mapping > Robarts Research Institute > Cuddy Wing - 9.4T Suite > P.O. Box 5015, 100 Perth Drive > London, Ontario, Canada N6A 5K8 > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------ > > _______________________________________________ > 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
