Radiation detector having reflective isolation plates

Details Radiation detector having reflective isolation plates Radiation detector having reflective isolation plates

1992-08-11

1994-01-04

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250367, 25037011, G01T 120

Patent

active

052763285

ABSTRACT:
A multi-elements radiation detector provides isolation plates each having a uniform light reflectance on the surface, excellent reproducibility and uniform performance for enhancing an X-ray spatial efficiency and a light transmission efficiency and is intended to improve a detection efficiency and an S/N of a reconstructed image so that the detector may be used for a digital X-ray imaging system, in particular, an X-ray computed tomography system. In the multi-elements radiation detector, each isolation plate isolating the adjacent elements from each other includes a thin plate made of Mo. On the surfaces of the thin plate, there are provided organopolysiloxane membranes obtained by hydrolyzing and condensing organosilicate such as CH.sub.3 Si(OCH.sub.3).sub.3 so that those surfaces are formed to be specular-reflective. On the films, there are formed reflective multi optical thin films composed of a combination of Al, MgF.sub.2 and TiO.sub.3. The isolation plate uses Mo as its material for improving its X-ray spatial efficiency. Further, the light reflectance on the surface is made as high as 85%, so that the light absorption is reduced on the surface of the isolation plate, thereby improving a light transmission efficiency and a detection efficiency. This leads to improving an S/N of an image reconstructed by an X-ray computed tomograpy system.

REFERENCES:
patent: 4914301 (1990-04-01), Akai
patent: 5144141 (1992-09-01), Rougeot et al.

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