Fig. 2.

A schematic description of challenges in separating bone and vasculature in CTA. (a) Multi-scale fusion of bone (green) and vessel (red) demands local scale-adaptive opening. (b) Intensity-based membership functions for vessel and bone along with pure and shared intensity bands. (c) Color-coded combined vessel and bone membership maps on an axial image slice in a patient's CTA. Regions indicated in pure green are pure bone; here, no pure vessel region is identified and therefore all other regions fall in the shared space. The figures shown in (a) and (b) were previously published by the authors in an IEEE conference paper [31].