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Proceedings Paper

Large Area Contrast Prediction In Screen-Film Systems
Author(s): Carl , J. Vyborny; Charles E. Metz; Kunio Doi
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Paper Abstract

A method for the prediction of radiographic contrast rendered by screen-film systems is described. The observed invariance of H & D curve shape with x-ray energy is used to postulate the existence of a single characteristicyrve for a given system. Densities are then described from this curve in terms of an effective exposure S(E)0(E)dE, where S(E) and 0(E) are the energy dependent sensitivity of the system and the x-ray spectral fluence respectively. We used two experiments to demonstrate the validity of this approach for typical screen-film systems. Contrast predictions based on fs(E)o(E)dE were made for screen-film systems having different phosphor materials. Results, which show contrast advantages for calcium tungstate systems in the no scatter case are consistent with the calculations of others based on screen x-ray energy absorption.

Paper Details

Date Published: 18 August 1980
PDF: 8 pages
Proc. SPIE 0233, Application of Optical Instrumentation in Medicine VIII, (18 August 1980); doi: 10.1117/12.958900
Show Author Affiliations
Carl , J. Vyborny, The University of Chicago (United States)
Charles E. Metz, The University of Chicago (United States)
Kunio Doi, The University of Chicago (United States)

Published in SPIE Proceedings Vol. 0233:
Application of Optical Instrumentation in Medicine VIII
Joel E. Gray; William R. Hendee; Andrew G. Haus; William S. Properzio, Editor(s)

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