1. A method for generating a two dimensional (2D) image of a structure having at least one pixel corresponding to at least one voxel of a three dimensional (3D) image of said structure comprising: modeling the surface of said structure in said 3D image using a geometrical volume; projecting normal maximum intensity projection (MIP) rays for voxels of the geometrical volume; and generating said 2D image having said at least one pixel corresponding to said at least one voxel of said 3D image using said MIP rays.