Radiographic film material and intensifying screen-film combination

Film material having at least one emulsion comprising {111} tabular silver halide grains rich in silver bromide, spectrally sensitive to irradiation in the wavelength range between 540 and 555 nm by the presence of a combination of at least one J-aggregating spectrally sensitizing cyanine dye according to the formula (I)

• wherein
• Z represents a nitrogen or an oxygen atom and is substituted with R″ if Z is a nitrogen atom,
• R, R′ and R″ each independently represent substituted or unsubstituted alkyl,
• R′″ represents hydrogen, substituted or unsubstituted alkyl or substituted or unsubstituted aryl,
• T and T′ each independently represent the usual substituents known in the art,
• (X−)p represents an negatively charged atom or group of atoms to compensate for the positive charge(s) present on the dye, and
• (M+)q represents a positively charged atom or group of atoms to compensate for the negative charge(s) present on the dye,
• wherein p and q each represent an integer in order to get an electronically neutral compound;
• and of at least one additional cyanine dye,
• characterized in that said additional cyanine dye or dyes provide(s) a shift of maximum absorption wavelength of said combination being less than 10 nm versus in the absence thereof,
• wherein said additional dye or dyes is at least one monomethine cyanine dye, and wherein said monomethine cyanine dye corresponds to the formula (II)
• wherein each of R1 and R2 independently represents a substituted or unsubstituted C1-C5 alkyl chain, or a substituted or unsubstituted (five- or six-membered) aromatic ring, provided that at least one of R1 and R2 has a solubilizing group or a latent solubilizing group;
• wherein W and W′ each independently represents a substituted or unsubstituted alkyl, a substituted or unsubstituted aryl or a substituted or unsubstituted heterocyclic group and wherein
• X is an anion, providing electrical neutrality, and said material moreover comprises at least one azacyanine dye.