1. A method for classifying an anatomical structure, the method comprising: processing image data including image data associated with an anatomical structure to generate segmented image data for the anatomical structure; generating a three dimensional (3D) model of the anatomical structure based on the segmented image data; using at least one processor, performing spherical harmonic shape analysis of the 3D model, including mapping the 3D model to a unit sphere and thereafter computing a number of spherical harmonics required to delineate the unit sphere to the 3D model; and classifying the anatomical structure based on the spherical harmonic shape analysis of the 3D model.