Fig 3.

Clustering procedure for removal of intersecting or touching sinuses (yellow arrow points to adjacent components). A, A single cross-sectional plane extracted from the image volume. The vessel object had an attached component. B, An overlay of the initial segmented vessel object onto a gray-scaled image at the extracted cross-sectional plane. C, The Euclidean distance transform map. D, The watershed transform. E, The final result of the separation procedure (red line) overlaid onto the original data.