AREA-TYPE X-RAY DETECTOR

PROBLEM TO BE SOLVED: To provide an area-type X-ray detector by which a ghost image caused by the previous scan of a photodiode is reduced and which can optimize the acquisition of an image. SOLUTION: A large-area-type X-ray detector 12 adopts may photodiodes 36 which are changed electrically and wh...

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Bibliographic Details
Main Authors PETRICK SCOTT W, SKRENES LAWRENCE R, GRANFORS PAUL RICHARD, POSSIN GEORGE EDWARD
Format Patent
LanguageEnglish
Published 25.09.1998
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:PROBLEM TO BE SOLVED: To provide an area-type X-ray detector by which a ghost image caused by the previous scan of a photodiode is reduced and which can optimize the acquisition of an image. SOLUTION: A large-area-type X-ray detector 12 adopts may photodiodes 36 which are changed electrically and which are discharge by irradiation with X-rays. A ghost image caused by the emission of an electric charge captured by the photodiodes 36 during a previous irradiation operation is removed by adjusting a bias in the resetting part of an imaging cycle. The bias may be increased so as to reduce a recharging time, or a polarity may be reversed in such a way that the photodiodes are discharged evenly, or the recharging time is reduced so as to preserve an offset. As a result, the ghost image is removed from succeeding image by an image processing operation.
Bibliography:Application Number: JP19970324296