Minnesota Mining and Manufacturing Company

Pierfiore Malfatto

Sergio Pesce

Marco Bucci

Renzo Torterolo

Marco Beruto

Elio Cavallo

Sergio Bruno

The present invention relates to an X-ray intensifying screen comprising a support, a reflective layer, and a phosphor layer, wherein said phosphor is selected in the group of UV-blue emitting phosphors having their emission maximum at a wavelength shorter than 450 nm, and wherein a fluorescent dye is dispersed into the reflective layer or into a fluorescent dye layer interposed between said reflective layer and said phosphor layer, said fluorescent dye having its spectral absorption maximum at a wavelength shorter than 400 nm and its spectral emission maximum at a wavelength longer than 400 nm.

X-ray intensifying screen

The present invention relates to a symmetrical radiographic assembly comprising:

Multicontrast radiographic film-screen assembly

A radiographic assembly comprising: a radiographic element which comprises a support and a front and back pair of silver halide emulsion layers coated on the opposite sides of the support, and a front and back pair of intensifying screens adjacent said front and back emulsion layers, respectively, wherein at least one of said silver halide emulsion layers shows a swelling index lower than 140% and a melting time of from 45 to 120 minutes, and the contrast difference between said pair of silver halide emulsion layers is at least 0.5, wherein the X-ray stimulated light emission difference between said pair of intensifying screens is at least 0.6 IogE, and wherein the average imagewise cross-over of said radiographic element is lower than 5% at optical density of from 0.5 to 1.75 and in the range of from 5 to 15% at optical density of from 1.75 to 3.25, said imagewise cross-over being measured according to the formula described in the specificaton.

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Cairo Montenotte, Italy

Pierfiore Malfatto