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RadioGraphics, Vol 12, 765-772, Copyright © 1992 by Radiological Society of North America

ARTICLES

Performance characteristics and image fidelity of gray-scale monitors

SJ Dwyer 3d, BK Stewart, JW Sayre, DR Aberle, MI Boechat, JC Honeyman, JM Boehme 2d, H Roehrig, TL Ji and GJ Blaine
Department of Radiological Sciences, University of California Los Angeles School of Medicine 90024-1721.

Gray-scale monitors are an essential element of electronic radiology, and their ability to provide images that are perceived to be identical to those available on conventional or laser-printed film is crucial to success of electronic radiology. Image fidelity is measured in physical characteristics (luminance, dynamic range, distortion, resolution, and noise) and with psychophysical techniques, including receiver operator characteristics analysis with clinical images and testing with contrast- detail patterns to determine threshold contrast. Currently, laser- printed images facilitate greater information transfer than does a gray- scale monitor because of their higher absolute luminance (500 ft-L vs 60 ft-L), greater perceived dynamic range, and better spatial resolution. In the near future, the developments of gray-scale monitors with 150-200 ft-L luminance, a display standard based on just noticeable differences, and algorithms to improve similarities between gray-scale display images and laser-printed images will help increase the acceptability of monitors as a means to make primary diagnoses.




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Copyright © 1992 by the Radiological Society of North America.