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