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American Journal of Roentgenology, Vol 97, 772-775, Copyright © 1966 by American Roentgen Ray Society

COMPARISON OF SEVERAL METHODS FOR EVALUATING IMAGE QUALITY OF RADIOGRAPHIC SCREEN-FILM SYSTEMS

K. ROSSMANN PH.D.1

1 From Research Laboratories, Eastman Kodak Company, Rochester, New York

The appearance of a radiograph results from a complicated interaction of several factors, each of which can be studied separately, but whose relative importance is not known in detail. It is difficult, therefore, to develop a general technique for measuring radiographic image quality which holds for all types of images under any imaging condition.

To illustrate this point, results obtained from several often-used methods of quality evaluation are compared: Contrast-detail diagram, modulation transfer function, and wire-mesh test.

It is concluded that image-quality evaluations by means of modulation transfer analysis and the visual inspection of wiremesh and hole radiographs can result in significantly different results.


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