Fig. 6.

The volume obtained from a previous step [Fig. 5(b)] was restricted more by analyzing the 2D axial slices (a) a representative axial slice of the obtained volume (b) finding the intersection of the first bone pixels with equally distant vertical lines (c) fitting line to obtained points and creating a binary mask, represented by red convex plane. The final orbital volume was constructed from pixels in each slice over-lapped with binary mask.