| 摘要 |
Articles such as luggage to be carried aboard aircraft are screened by a first stage examination unit ( 14 ) such as a CT scanning unit which identifies suspect regions ( 16 ) having a relatively high probability of containing contraband. Articles containing such suspect regions are then examined at a physically separate unit ( 20 ) by energy dispersive x-ray diffraction (EDXD) with diffraction occurring at locations within the identified suspect regions. Because EDXD examination is concentrated on the suspect regions, the EDXD examination can be performed rapidly.
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