Abstract: A monitoring installation for containers and trucks is provided making detection of large items, particularly trucks, at minimal expense possible. An X-ray monitoring installation having low X-ray energy, permits detection of stolen passenger cars, is arranged on a monitoring path.

Abstract: A simplified and improved object testing system which, according to the present invention, includes a first and a second imaging system for generating a radiograph of the object as a visible image on a monitor, and a common operating unit controlling the first and second imaging system.

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.

Abstract: An apparatus for inspecting containers or vehicles at airports for illegal contents, such as bombs, weapons, drugs or smuggled goods includes two x-ray generators and two line-shaped radiation detectors, a first of the radiation detectors receiving radiation from a fan beam of a first radiation generator, and the second radiation detector receiving radiation from a fan beam of a second radiation generator. The respective central rays of the fan beams are disposed substantially perpendicularly realtive to each other.