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Assessment of Radiographic Image Quality by a Single Number in Terms of Entropy

  • H. Fujita
  • S. Uchida
Conference paper
  • 206 Downloads
Part of the Springer Series in Optical Sciences book series (SSOS, volume 31)

Abstract

A new and simple method by which the image quality of radiographs could be evaluated by a single number in terms of entropy was introduced by UCHIDA et al. in 1978, and applied to the problem of evaluating the performance of development processes [1]. This method of evaluation, which is termed the entropy method, has been applied to various problems in radiology [2–7]. In the present paper, the assessment of radiographic image quality or granularity of screen-film systems used in diagnostic radiology by a single number in terms of the entropy is described on the basis of our recent paper [4], and some considerations on the conditional entropy are made.

Keywords

Transmitted Information Entropy Method Single Number Conditional Entropy Joint Entropy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    S. Uchida and D. Y. Tsai,Jpn. J. Appl. Phys. 17, 2029 (1978).ADSCrossRefGoogle Scholar
  2. 2.
    S. Uchida and D. Y. Tsai,Jpn. J. Appl. Phys. l8, 1571 (1979).ADSCrossRefGoogle Scholar
  3. 3.
    S. Uchida, H. Inatsu and H. Fujita,Jpn. J. Appl. Phys. 19, 1177 (1980).ADSCrossRefGoogle Scholar
  4. 4.
    S. Uchida and H. Fujita,Jpn. J. Appl. Phys. 19, 1403 (1980).Google Scholar
  5. 5.
    S. Uchida, S. Katsuragawa and T. Sueyoshi,Jpn. J. Appl. Phys. 19, 2257 (1980).ADSCrossRefGoogle Scholar
  6. 6.
    S. Uchida, D. Y. Tsai and H. Abe,Jpn. J. Appl. Phys. 19, 2247 (1980).Google Scholar
  7. 7.
    S. Uchida, A. Ohtsuka and H. Fujita,Jpn. J. Appl. Phys. 20, 629 (1981).ADSCrossRefGoogle Scholar
  8. 8.
    H. Fujita and S. Uchida,submitted to Jpn. J. Appl. Phys.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1982

Authors and Affiliations

  • H. Fujita
    • 1
  • S. Uchida
    • 2
  1. 1.Department of Electrical EngineeringGifu Technical CollegeMotosu, Gifu 501-04Japan
  2. 2.Department of Electrical Engineering, Faculty of EngineeringGifu UniversityKagamigahara, Gifu 504Japan

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