The Rapiscan 638DV is an advanced dual-view X-RAY system for screening ULD, ISO standard, lower deck and large cargo pallet type freight. With a large and spacious tunnel size of 1,837 mm x 1,800 mm and explosives and narcotics detection alert feature, the RAPISCAN 638DV is widely used for air cargo screening and customs applications where throughput is most important. THE RAPISCAN 638DV has been approved and included on the u.s. TSA air cargo screening technology list (ACSTL) and the transport canada (TC) air cargo security program (ACS).