Multiple angle pre-screening tomographic systems and methods

Details Multiple angle pre-screening tomographic systems and methods Multiple angle pre-screening tomographic systems and methods

1997-08-07

1998-08-18

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378901, 378 57, G01N 2304, A61B 603

Patent

active

057968020

ABSTRACT:
A multiple angle tomographic system includes a rotating gantry with a source, e.g., an x-ray source, and detector array combination mounted thereon so as to acquire a plurality of projections of objects passing through the gantry. A pre-screen subsystem utilizes a subset of the projections from those that can be acquired during a full scan so as to define a first plurality of projections--e.g., eight projections--that are sufficient analyze whether there is a likelihood that a targeted object, e.g., a firearm and/or plastic explosives is present. If there is a likelihood that a targeted object is present, a full-image CT reconstruction is commanded, automatically or manually, so as to verify and more fully assess the detected object. This combination of pre-screen and selective full-image CT reconstruction provides thorough inspection of closed containers, e.g., passenger luggage, by providing multiple angle and perspective viewing of targeted objects.

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