1. A method for coronary artery detection in a 3D cardiac volume, comprising: segmenting at least one heart chamber in said volume; generating an initial estimation of a coronary artery in said volume based on the segmented at least one heart chamber, the initial estimation of the coronary artery comprising a plurality of control points defining the coronary artery; and detecting the coronary artery in said 3D cardiac volume by refining each of the control points in the initial estimation of the coronary artery based on local information to each of the control points in said volume.