Scattered radiation imaging apparatus

Details Scattered radiation imaging apparatus Scattered radiation imaging apparatus

1992-05-11

1993-11-09

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Diffraction, reflection, or scattering analysis

378 57, 378 90, G01N 23201

Patent

active

052609820

ABSTRACT:
A flying-spot pencil beam generating unit is arranged under a conveyor. A backscatter detector is located between an upper belt and a lower belt of the conveyor. Thus, this apparatus is set up to be perpendicular. A pencil beam is irradiated upward and scans an object on the belt of the conveyor by the flying-spot pencil beam generating unit, as the conveyor carries the object to be inspected. The backscatter detector gathers Compton scatter X-rays transmitted through the upper belt, as they reflect back from the object. A CPU produces a backscatter image based on the detection signal output from the backscatter detector. The backscatter image is shown on a display unit to enable detection of low-Z materials, such as plastic explosives and narcotics. In addition to the backscatter imaging, the unit may retain use of a transmitted image to thus reliably detect metal-based weapons such as guns.

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patent: 4956856 (1990-09-01), Harding
patent: 5022062 (1991-06-01), Annis
patent: 5065418 (1991-11-01), Bermbach et al.

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