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Radiographic image processing method and photographic imaging apparatus therefor

  • US 5,132,998 A
  • Filed: 03/01/1990
  • Issued: 07/21/1992
  • Est. Priority Date: 03/03/1989
  • Status: Expired due to Term
First Claim
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1. A radiographic image processing method, comprising steps of:

  • obtaining information relating to transmission images which are obtained by radiating radiations having more than two different energy levels onto a subject in the same direction,preparing a logarithmic image through a logarithmic transformation of the transmission image obtained by use of a radiation of an energy level, and another logarithmic image through a logarithmic transformation of another transmission image obtained by use of a radiation of another energy level, andobtaining an image contrast ratio of the logarithmic images at a specific part of the subject by use of said logarithmic images.

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