Fig. 4.

Convergence of the average symmetric white matter (left panel) and mid-cortical (middle panel) surfaces for the NMT cohort (N = 29). The residual represents the vertex-wise mean displacement in the average surface from one iteration to the next and should tend to zero as the vertices are no longer moving. Max represents the largest vertex-wise displacement from one iteration to the next. Deviation represents the mean vertex-wise displacement for the N = 29 subjects (58 surfaces) and is a measurement of inter-subject shape variability. The rightmost panel shows the histogram of the area of the triangles on the final average white matter and mid-cortical surfaces, indicating a nearly uniform point sampling over the surface.