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Films for reproducing digitally stored medical diagnostic images

  • US 5,637,447 A
  • Filed: 12/19/1995
  • Issued: 06/10/1997
  • Est. Priority Date: 12/19/1995
  • Status: Expired due to Fees
First Claim
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1. A radiation-sensitive silver halide film for reproducing digitally stored medical diagnostic images through a series of laterally offset exposures by a controlled radiation source followed by processing in 90 seconds or less, including development, fixing and drying, comprised ofa transparent film support and, coated on the support,a hydrophilic colloid layer unit containing a silver halide emulsion,wherein(A) the film exhibits an average contrast in the range of from 1.5 to 2.0, measured over a density above fog of from 0.25 to 2.0,(B) the emulsion layer(1) contains silver bromochloride grains including grain faces lying in {100} crystal planes(a) comprised of from 20 to 40 mole percent bromide, based on total silver,(b) having a mean equivalent circular diameter of less than 0.40 μ

  • m,(c) exhibiting an average aspect ratio of less than 1.3, and(d) coated at a silver coverage of less than 40 mg/dm2, and(2) has adsorbed to the surfaces of the silver bromochloride grains at least one spectral sensitizing dye having an absorption half peak bandwidth in the spectral region of exposure by the controlled radiation source, and(C) the film contains an infrared opacifying dye that is capable of reducing specular transmission through the film before, during and after processing to less than 50 percent, measured at a wavelength within the spectral region of from 850 to 1100 nm.

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