Minnesota Mining and Manufacturing Company

Sergio Pesce

Pierfiore Malfatto

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

The present invention refers to a cassette comprising a front element hinged on the rear edge thereof to a back element of the cassette and a first fluorescent intensifying screen fixed, in the interior of said cassette, to said front element and a second fluorescent intensifying screen fixed, in the interior of said cassette, to said back element of the cassette, to be used with a radiographic film situated between and in close contact with said screens. The cassette is characterized by the fact that the first intensifying screen comprises a first radiation emitting phosphor and the second intensifying screen comprises a second radiation emitting phosphor, and in that said first radiation emitted by said first intensifying screen are in a first wavelength region of the electromagnetic spectrum and said second radiation emitted by said second intensifying screen are in a second region of the electromagnetic spectrum. The cassette is for use with a combination of photosensitive elements for radiography formed by the pair of radiographic fluorescent screens and a double-side coated silver halide radiographic element. Each screen is arranged adjacent to each silver halide layer, each screen is capable of imagewise emitting radiation to which the adjacent silver halide layer is sensitive when imagewise exposed to X radiation and each silver halide emulsion layer is substantially insensitive to the radiation emitted by the opposite screen.

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Savona, Italy

Sergio Pesce