Functional Region Annotation of Liver CT Image Based on Vascular Tree

Table 1

Graph attributes description.

Vertex		3D coordinate values of each vertex
		The distance from vertex to its nearest surface voxel of
Edge		The actual length of the branch
		The Euclidean distance between the two vertexes
		The mean radius of the branch:
		is the voxel numbers in
		The angle from the parent edge to
		The edge belonging to which part of vascular system (portal/hepatic vein)