1. A method for detecting and classifying a structure of interest in a three-dimensional medical image, comprising the steps of: (a) defining one or more image planes in a subvolume in said three-dimensional medical image; (b) determining edge displacement fields for a plurality of slices in each of said defined image plane, wherein said plurality of slices are defined over the axis perpendicular to said corresponding image plane; (c) combining said determined edge displacement fields for each of said defined image plane; (d) determining parameters based on said combined edge displacement field; and (e) classifying said structure of interest based on said determined parameters.