Required Top Assembly Part Number Implant Sciences Corporation / AS&E / XIS-100XDV Astrophysics Inc / Astrophysics Inc / XIS-100XDX Astrophysics Inc / 15DV-20 Astrophysics Inc / Gilardoni Implant Sciences Corporation / Assembly Part Number Device Model Number Astrophysics Inc / General Electric Homeland Protection / Air Cargo Screening Technology List Explosive Detection Systems / Explosive Detection Systems / /