CT array with improved photosensor linearity and reduced crossta

Details CT array with improved photosensor linearity and reduced crossta CT array with improved photosensor linearity and reduced crossta

1994-06-21

1995-07-04

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

250366, 250368, 25037009, G01T 120

Patent

active

054302986

ABSTRACT:
A computed tomography (CT) imager includes a scintillator and a photosensor array optically coupled to the scintillator through an optical coupling layer. The photosensor array includes a plurality of photosensitive devices disposed in a block so as to receive incident light from the scintillator through a first surface of the block; each photosensitive device forms a pixel in the array, and each pixel further has a fully photoactive region in which the quantum efficiency of the photosensor is greater than about 65%. The optical coupling layer further includes a pixel boundary light barrier that is made of light absorptive material disposed in the optical coupling layer overlying the areas on the photosensor array first surface between respective fully photoactive regions of the photosensitive devices. The pixel boundary light barrier is disposed to absorb substantially all light photons passing along a path between the scintillator and pixels in the photosensor array other than the pixel underlying the portion of the scintillator in which the light photons were generated, thereby reducing noise and cross-talk in the array and enhancing the linear operating characteristics of photosensors in the array.

REFERENCES:
patent: 4720426 (1988-01-01), Englert et al.
patent: 4914301 (1990-04-01), Akai
patent: 4982096 (1991-01-01), Fujii et al.
patent: 5179284 (1993-01-01), Kingsley et al.
patent: 5233181 (1993-08-01), Kwasnick et al.

Affiliated with

Also associated with

Rating

CT array with improved photosensor linearity and reduced crossta does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with CT array with improved photosensor linearity and reduced crossta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CT array with improved photosensor linearity and reduced crossta will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-762136