1. A method of determining a location of an object in a radiographic image by segmentation of a region in the image comprising the steps of: determining, from memory storing the image, a first image intensity in said region, wherein said first image intensity is a maximum intensity of said region; determining a second image intensity outside of said region, wherein said second image intensity is a minimum intensity outside of said region; determining if a pixel is added to or removed from said region based on a similarity of an intensity of said pixel to said first and second intensities; and using contrast energy, modifying a contour of said region to selectively include the pixel within the region based on the determining if a pixel is added to or removed from said region.