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Proceedings Paper

An Analysis Of The Fundamental Limitations Of Screen-Film Systems For X-Ray Detection I. General Theory
Author(s): Rodney Shaw; Richard L VanMetter
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Paper Abstract

A model is developed for the overall DQE of an x-ray screen-film system, and this is related to the component DQE's of the screen and film. The model characterizes the screen in terms of its x-ray absorption efficiency, MTF, and the statistics associated with the conversion of absorbed x-rays to emitted light photons. This model establishes that the film need be characterized solely by its DQE with respect to the emitted light photons. We show that the only explicit exposure dependence of the screen-film DQE results from the film DQE, while the spatial-frequency dependence is dominated by the screen MTF. However, depending on the screen gain, a significant exposure/spatial-frequency domain may exist where the overall DQE is independent of both of these factors and depends mainly on x-ray absorption efficiency.

Paper Details

Date Published: 15 June 1984
PDF: 5 pages
Proc. SPIE 0454, Application of Optical Instrumentation in Medicine XII, (15 June 1984); doi: 10.1117/12.939323
Show Author Affiliations
Rodney Shaw, Eastman Kodak Company (United States)
Richard L VanMetter, Eastman Kodak Company (United States)

Published in SPIE Proceedings Vol. 0454:
Application of Optical Instrumentation in Medicine XII
Samuel J. Dwyer; Roger H. Schneider, Editor(s)

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