Radiography

Details Radiography Radiography

G - Physics

21

K

96/197

G21K 4/00 (2006.01) G03C 5/17 (2006.01)

Patent

CA 1038683

ABSTRACT OF THE DISCLOSURE A combination of photosensitive materials suited for radiography comprising : (1) a photosensitive silver halide recording material, which comprises a support and incorporates at least one silver halide emulsion layer, and (2) at least one X-ray fluorescent intensifying screen material comprising a phosphor layer, characterised in that the screen contains (a) a phosphor or a phosphor mixture consisting wholly or mainly of a rare earth metal-activated lanthanum oxyhalide, said phosphor or phosphor mixture having more than half its spectral emission above 410 nm, more than half its visible light spectral emission between 400 and 500 nm, and its maximum of emission in the wavelength range of 400-500 nm and said phosphor layer having a coverage of 200 to 800 g of said lanthanum oxyhalide phosphor per sq.m, and (b) (a) dye(s) and/or pigment(s) absorbing light within the emission spectrum of said phosphor.

208613

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