Multi-layer X-ray screens

Details Multi-layer X-ray screens Multi-layer X-ray screens

1974-03-14

1976-02-03

Dixon, Harold A.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

250460, 250488, G01J 158, G01N 2152

Patent

active

039366448

ABSTRACT:
An X-ray intensifying screen having reduced radiographic mottle comprising a plurality of layers including a photographic film and two or more phosphor layers, the phosphor layers having increasing luminous efficiency, under X-ray radiation, from the layer nearest the photographic film to the outermost layer from said film. The luminous efficiencies are adjusted to cause about equal film densities, on absorption of about equal X-rays for each phosphor layer. Thus, the total density of the phosphor layers would be about equal to the film density of a single phosphor layer comprising a similar phosphor of homogeneous brightness.

REFERENCES:
patent: 3617743 (1971-11-01), Rabatin
patent: 3717764 (1973-02-01), Fujimura
patent: 3725704 (1973-03-01), Buchanan
patent: 3795814 (1974-03-01), Rabatin

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