Automatic threat detection based on illumination by penetrating

Details Automatic threat detection based on illumination by penetrating Automatic threat detection based on illumination by penetrating

1991-06-04

1993-01-12

Howell, Janice A.

X-ray or gamma ray systems or devices

Specific application

Absorption

378 86, 378 87, 382 18, 382 41, 382 51, 2504421, 2504721, 358111, G01N 2304

Patent

active

051795817

ABSTRACT:
Automatic threat detection in association with imaging which relies on a backscatter detector and illumination by a flying spot source of penetrating radiation. The digital backscatter image is processed to produce a histogram. The histogram is compared to a predetermined threat characteristic and an alarm is sounded if the histogram exceeds the threat characteristic. The threat characteristic is derived in an empirical fashion and automatically modified based on sensing selected parameters associated with the scanning. Operator control over the threat characteristic is also implemented. The flying spot source is also associated with a transmit detector to produce a transmit image. The transmit image is also processed against predetermined parameters for threat assessment. The predetermined parameters are also operator variable.

REFERENCES:
patent: 4031545 (1977-06-01), Stein
patent: 4799247 (1989-01-01), Annis
patent: 5022062 (1991-06-01), Annis

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