Patent ID: 7400701

Claim:
An inspection system for inspecting an object characterized by motion in a direction with respect to the inspection system, the system comprising: a. a first pencil-beam source for providing a first beam of penetrating radiation of specified cross-section directed in a first beam direction substantially transverse to the direction of motion of the object; b. a second pencil-beam source for providing a second beam of penetrating radiation of specified cross-section substantially coplanar with, and substantially perpendicular to, the first beam of penetrating radiation, directed in a second beam direction, and temporally interspersed with the first beam of penetrating radiation; c. a plurality of scatter detectors each scatter detector of which is disposed so as to detect radiation scattered from both the first beam and the second beam by any scattering material within the inspected object and for generating a scattered radiation signal; and d. a controller for creating an image of the scattering material based solely on the scattered radiation signal.