Noise, Objective, And Psychophysical Measures

Joel E. Gray

doi:10.1117/12.954040

1 February 1975 Noise, Objective, And Psychophysical Measures

Joel E. Gray

Author Affiliations +

Proceedings Volume 0047, Application of Optical Instrumentation in Medicine III; (1975) https://doi.org/10.1117/12.954040
Event: Application of Optical Instrumentation in Medicine III, 1974, Kansas City, United States

Abstract

Image evaluation in diagnostic radiology and nuclear medicine is an area of concern to many researchers today. It is not only a challenging field for the physicist but of extreme importance to the radiologist. Ultimately both the radiologist and the physicist would like to optimize the radiographic imaging processes, but before it is possible to optimize a system it is first necessary to be able to quantitate the system in meaningful terms. An extensive effort has been directed to the quantitation of image quality in radiology over the past years utilizing objective measures such as the modulation transfer function (MTF), resolution, contrast, signal-to-noise ratio, etc. Since these do not include the interaction of the radiologist with the radiographic image, the results, more of-ten than not, do not correlate with the radiologist's subjective opinion of the system. More recently several researchers have applied the principles of psychophysical evaluation to radiographic imaging bringing the radiologist and his subjective interactions into the evaluation of image quality. This has led to some insight into the problems of radiological imaging, but the expense in terms of radiologist's and physicist's time may not be justifiable in many instances.

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Joel E. Gray "Noise, Objective, And Psychophysical Measures", Proc. SPIE 0047, Application of Optical Instrumentation in Medicine III, (1 February 1975); https://doi.org/10.1117/12.954040

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