1. An X-ray system for processing X-ray data to determine an identity of an object under inspection, comprising: an X-ray source for transmitting a plurality of X-rays, wherein said X-rays have a range of energies, through the object; and a detector array for detecting said transmitted X-rays, wherein said detector array comprises a first detector disposed in front of a second detector, and wherein said detector array is configured relative to the transmitted X-rays such that the transmitted X-rays pass through the first detector before passing through the second detector.