MAGNET: an active ditch extraction model

Presents a novel model to detect the deepest point of a ditch as cerebral sulcus. The authors model demonstrates magnetic behavior and consists of four ideal magnetic poles: an N-pole and three S-poles. Due to their Coulomb forces as the inverse square of the distance, one of S-poles automatically reaches the deepest point of the ditch. This model can also detect the point in case of ditch with implicit branches. The authors´ experimental results on sliced human brain MR images show that their method can detect the points at 90% correct detection ratio