A system for dual-energy radiography

Authors:
  • RSR. D. Speller
    R. D. Speller
  • GEG. J. Ensell
    G. J. Ensell
  • CWC. Wallis
    C. Wallis
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Abstract
A system was developed and theoretically analysed for the generation of chemical information from conventional radiography [in humans]. A specially modified cassette has enabled dual-energy radiographs to be taken during a single exposure. A simple theoretical model has demonstrated that the concept of an optical density standardized to the local surroundings allows adequate quantification of the dual-energy radiographs. Using this method, data can be obtained relating to the effective atomic number of a radiographed material provided some estimate of its physical density is known. Simulated in vivo analysis of gall-stone composition was demonstrated using these techniques.