System and method for radiological image formation

Details System and method for radiological image formation System and method for radiological image formation

1998-02-24

1999-12-07

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Luminescent imaging

430585, 430604, 430605, 430433, 430966, G03C 516

Patent

active

059980834

ABSTRACT:
An image-forming system for radiological imaging is disclosed said system consisting of an intensifying screen comprising on a support at least one layer of a green-light emitting phosphor and, in operative association therewith, a prehardened light-sensitive photographic silver halide film material, comprising a support and on both sides thereof one or more hydrophilic colloid layers, said layers being hardened to such an extent that their swelling degree is reduced to less than 200% after immersing said material for 2 minutes in demineralised water of 35.degree. C.; further comprising in at least one of said hydrophilic layers chemically ripened, monodisperse essentially cubic silver chloroiodide grains having a mean crystal diameter of from 0.40 mm up to 0.65 mm; wherein said grains have been spectrally sensitised in the wavelength range between 520 and 580 nm, have a maximum absorption between 540 and 500 nm and have been coated in a total amount of silver per sq.m. of from 6 g up to 8 g, wherein said amount is expressed as an equivalent amount of silver nitrate per sq.m.; said image-forming system being characterised in that said silver chloroiodide grains have been doped with a complex ion compound satisfying the formula

REFERENCES:
patent: 5380636 (1995-01-01), Malfatto et al.
patent: 5728516 (1998-03-01), Edwards et al.
patent: 5783379 (1998-07-01), Wiilems et al.
patent: 5795704 (1998-08-01), Willems et al.

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