A dual energy x-ray imaging system searches a moving automobile for concealed objects. Dual energy operation is achieved by operating an x-ray source at a constant potential of 100KV to 150KV, and alternately switching between two beam filters. The first filter is an atomic element having a high k-edge...http://www.google.es/patents/US8116431?utm_source=gb-gplus-sharePatente US8116431 - Automobile scanning system
