X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1990-08-09
1992-02-25
Howell, Janice A.
X-ray or gamma ray systems or devices
Specific application
Absorption
378 62, 378 99, 378145, 358111, G01N 2304
Patent
active
050919245
ABSTRACT:
An apparatus is disclosed for examining containers and/or vehicles at an airport for impermissible contents, such as explosives, weapons, drugs, smuggled goods and the like. To improve the ability to identify such items in the article or vehicle under inspection, an image processor is provided having a computer to which the signals of the radiation detectors are supplied. The computer uses these signals to calculate a radiation silhouette of the articles. A memory is provided in which a reference image of the article is stored. A comparison circuit is supplied with the signals from the computer and from the memory, so that a differential image derived from the calculated radiation silhouette from the computer and from the reference image is displayed on a monitor, connected to the comparison circuit. Differences between the cureent image and the reference image can thereby be easily observed.
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Bermbach Rainer
Doenges Gerhard
Geus Georg
Koch Cornelius
Chu Kim-Kwok
Heimann GmbH
Howell Janice A.
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