X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1991-10-03
1993-01-26
Hannaher, Constantine
X-ray or gamma ray systems or devices
Specific application
Absorption
378 8, 378 54, 378 62, 378 69, 378 53, 25044211, G01N 2304
Patent
active
051827646
ABSTRACT:
An apparatus for detecting concealed objects, such as explosives, drugs, or other contraband is disclosed. The apparatus uses CT scanning to identify concealed objects with a density corresponding to the density of a target object such as explosives or drugs. To reduce the amount of CT scanning required, a number of prescanning approaches are disclosed. Based upon the prescan data, selected locations for CT scanning are identified. CT scanning is undertaken at the selected locations. The resultant CT scan data is utilized to automatically identify objects of interest. This identification of objects may be verified through further automatic analysis of such attributes as shape, texture, and context. Finally, the objects of interest may be reconstructed and displayed on a computer monitor for visual analysis by an operator.
REFERENCES:
patent: 4788704 (1988-11-01), Donges et al.
patent: 4941162 (1990-07-01), Vartsky et al.
patent: 5070519 (1991-12-01), Stein et al.
patent: 5125015 (1992-06-01), Shimoni et al.
Harmann Jonathan
Peschmann Kristian R.
Chu Kim-Kwok
Hannaher Constantine
Invision Technologies, Inc.
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