nFilter method for an x-ray system, and device for carrying out such a filter methodUS5600700Sep 25, 1995Feb 4, 1997Vivid Technologies, Inc.Detecting explosives or other contraband by employing transmitted and scattered X-raysUS5768334May 16, 1994Jun 16, 1998Europ ScanMethod and device for identifying designated materials in the composition of an objectUS5805660 *Jul 13, 1994Sep 8, 1998Europ Scan