Cortical Surface Reconstruction from High-Resolution MR Brain Images

Figure 1

Schematic illustration of a fragment of brain slice. Contours of the inner and pial surface are marked in red and green. Due to partial volume effects and limited resolution, adjacent banks of gray matter in some sulci may appear as fused together, creating either a “bridged” sulcus or an unresolved sulcal fundus (a “buried” sulcus). Note that a “bridged” sulcus creates a topological defect, a handle, which may be corrected by a topology-preserving model, whereas a “buried” sulcus does not change the topology.