Solid state area x-ray detector with adjustable bias

A large area solid state x-ray detector employs a number of photodiodes that are charged electrically then discharged by exposure to x-ray. Ghost images resulting from release of charge trapped in photodiodes during prior exposures are eliminated by adjusting the biasing during a reset portion of th...

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Bibliographic Details
Main Authors PETRICK; SCOTT W, GRANFORS; PAUL R, SKRENES; LARRY R, POSSIN; GEORGE E
Format Patent
LanguageEnglish
Published 06.07.1999
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MEASUREMENT OF NUCLEAR OR X-RADIATION
MEASURING
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEMICONDUCTOR DEVICES
TESTING
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Summary:A large area solid state x-ray detector employs a number of photodiodes that are charged electrically then discharged by exposure to x-ray. Ghost images resulting from release of charge trapped in photodiodes during prior exposures are eliminated by adjusting the biasing during a reset portion of the imaging cycle. Biasing may be increased to decrease the recharge time or reversed in polarity to evenly discharge the diodes or decreased to preserve the offset so that it may be removed from subsequent images by image processing.
Bibliography:Application Number: US19960758604