In a method for surface contouring of a three-dimensional image of an object a set of planes is placed through the three-dimensional image, and the contours that are imaged in each of the planes of the first set of planes, and that are associated with the surface contour of the three-dimensional image,...http://www.google.com.au/patents/US7376254?utm_source=gb-gplus-sharePatent US7376254 - Method for surface-contouring of a three-dimensional image
