Fig. 6
From: Left main coronary artery morphological phenotypes and its hemodynamic properties
Partitioning of coronary arteries using Frenet–Serret frame. A Trim left main (LM) coronary artery and preserve partial left anterior descending artery and left circumflexus. B Establish a normal plane through the distal control point of the LM centerline to divide LM into bifurcation and stem segments. C Subdivide LM using the normal plane and tangent planes at each control point. D Each LM and its branches could be divided into 6 regions