Patent ID: 7697742

Claim:
A method executing on a computing device for identifying a junction between a lesion and a wall adjacent an internal space in a computed tomography (CT) scan image, comprising: receiving, as input to the computing device, the CT scan image and first and second seed points at opposing sides of the lesion in the CT scan image; determining a boundary of the wall adjacent the internal space in the CT scan image; determining critical points along the boundary; and selecting first and second junction points on the boundary at the opposing sides of the lesion, including computing distance measured along the boundary from each of the first and second seed points to the critical points along the boundary, selecting first and second ones of the critical points along the boundary respectively having a shortest distance measured along the boundary to the first and second seed points at the opposing sides of the lesion, and selecting the first and second ones of the critical points as the first and second junction points, respectively, wherein the first and second junction points identify the junction between the lesion and the wall.