Error measures

In order to quantitatively evaluate the methods and compare them with previously published results [1], a 3D root-mean-squared (rms) minimum distance measure, ${D_{\mathsf{surf}}}$, was computed for the ESS of selected sulci that were identified manually by a medically-trained expert on the phantom volumes and on the real MRI volumes. The 3D rms minimum distance measure is defined on a point-wise basis, computing the root mean square (over all nodes in the ESS defining the sulcus) of the minimum distance between each node in the transformed source sulcus and closest point on the target sulcus surface.