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Original Articles

Informational Performance In RadiographyFootnote

Pages 148-155 | Received 11 Feb 1964, Published online: 22 Jul 2016

References

  • deBen. H. S. Phot. Sci. and Eng., 6, 289 (1962).
  • Blackwell. H. R., and McCready. W. D. Data of 1958 in N. W. Taylor. J. Opt. Soc, Amer., 52, 820 (1962): Appendix. The plotted data are an interpolation between their data for I ft,-L. and 10 ft-L which should approximate the eve’s performpnce at a luminance level of 4 ft.-L.
  • Ogle, K. N. J. Opt. Sco. Amer, 51, 862 (1961). makes extensive use of this asymptotic concept.
  • Taylor. N. W. Op. cit., Table VI. and also Ogle. Op. cit. Table II.
  • Rose A. Sec for example Advames in Biol. and Med. Physics., 5, 211 (1957).
  • It should be noted that the stimuli for the visual data were bright discs against a darker background, whereas the radiographic stimuli are the opposite. However, the comparison is mainly for showing spread and scan (spatial) limitations and is therefore valid.
  • This is the viewing distance used in all of the author’s experiments.
  • Hay, G. A. Advances in Electronic and Electron Physics., 12, 363 (1960). Used this term for an equivalent quantity.
  • Here it is assumed that the fluctuations in density from both sources are Gaussian and that the two functions are combined in a convolution integral to yield a new function of standard deviation α (D).
  • Sturm. R. 1 ., and Morgan. R. H. Am. J. Roentgenol., Radium Therapy Nucl. Med., 62, 617 (1949).
  • This is merely a standaid deviation of a binomial distribution.
  • Mees, C. E. K. The Theory of the Photographic Process, rev. ed., p. 811, Macmillan, New York (1954).
  • For example, Ansco High Speed film. Radelin T fluorescent screens, 65 kvp X-radiation of effective wavelength 0-4Å.
  • Radelin T, a medium speed CaWO4 screen.
  • This value, which was found previously (ref. 1), was also found to be optimum for this system.
  • Zweig, H. J., Higgins, G. C. and MacAdam, D. L. J. Opt. Soc. Amer., 48, 926 (1958).
  • Jones, R. C. J. Opt. Soc. Amer., 45, 799 (1955).
  • Marriage, A., and Pitts, E. J. Opt. Soc. Amer., 46, 1019 (1956).
  • Rossmann. K. J. Opt. Soc. Amer., 52, 774 (1962).
  • Rossmann. K. J. Opt. Soc. Amer., 52, 1162 (1962).

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