Brain extraction results by the 3D deformable-surface-based method and the 4D method in aBEAT.

Sagittal slices are shown. Blue voxels show the common labeling results by automated method and manual ground-truth. Green voxels are the residual non-brain tissues (false positives), and red voxels are the wrongly-removed brain regions (false negatives). The regions in the yellow dotted squares are zoomed, which indicates that the 4D method is more accurate and consistent than the 3D method.