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RadioGraphics, Vol 11, 259-268, Copyright © 1991 by Radiological Society of North America

ARTICLES

Direct comparison of conventional and computed radiography with a dual- image recording technique

H MacMahon, S Sanada, K Doi, M Giger, XW Xu, FF Yin, SM Montner and M Carlin
Kurt Rossmann Laboratories for Radiologic Image Research, Department of Radiology, University of Chicago, IL 60637.

To compare the image quality of computed radiographic (CR) with conventional screen-film images, the authors used a dual-image recording technique. Images were simultaneously acquired with a conventional screen-film combination and a storage-phosphor imaging plate loaded into a single cassette. Wiener spectra and modulation transfer function were compared for both image types. A preliminary observer performance test was conducted with chest images obtained with the dual-image recording technique on portable and fixed equipment. Analysis of physical parameters and observer test results suggests that the conventional screen-film system can provide slightly superior image quality, although the CR system has some advantage in bedside applications.




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