1. A method for identifying a virtual image plane comprising: identifying a plurality of reconstructed image planes representing a plurality of reconstructed images, each reconstructed image plane in said plurality of reconstructed image planes having a corresponding tilt angle; identifying a plurality of estimated image planes as a function of said tilt angles; determining for each estimated image plane a maximum distance from a point on a reconstructed image plane in said plurality of reconstructed image planes to each estimated image plane in said plurality of estimated image planes; and identifying a virtual image plane as a function of said step of determining said maximum distance.