Solid state area x-ray detector with adjustable bias

Details Solid state area x-ray detector with adjustable bias Solid state area x-ray detector with adjustable bias

1996-11-27

1999-07-06

Glick, Edward J.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

378 988, G01T 124

Patent

active

059200707

ABSTRACT:
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.

REFERENCES:
patent: 4797560 (1989-01-01), Berger et al.
patent: 4996413 (1991-02-01), McDaniel et al.
patent: 5041888 (1991-08-01), Possin et al.
patent: 5352884 (1994-10-01), Petrick et al.
patent: 5530238 (1996-06-01), Meulenbrugge et al.

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