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Proceedings Paper

Signal-To-Noise Ratio, Dynamic Range And Contrast Sensitivity Of Radiographic Imaging Systems
Author(s): Ronald P. Schwenker
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Paper Abstract

Signal-to-noise ratio, dynamic range and contrast sensitivity are three parameters used to describe performance or quality of electronic medical imaging systems or components. The meaning and significance of these parameters are discussed and their values for various systems, including conventional film-screen systems, are derived. An additional parameter, "useful dynamic range", is introduced and related to existing systems. Under optimum conditions the signal-to-noise ratio of a radiographic imaging system will be determined only by quantum statistics. For a quantum limited system contrast sensitivity is related to x-ray dose and independent of the particular system used, analog or digital. The "useful dynamic range" of most electronic imaging systems is limited by system noise to a value less than that typically exhibited by conventional film-screen systems, 20:1 to 50:1.

Paper Details

Date Published: 13 December 1983
PDF: 6 pages
Proc. SPIE 0419, Application of Optical Instrumentation in Medicine XI, (13 December 1983); doi: 10.1117/12.936005
Show Author Affiliations
Ronald P. Schwenker, E. I. du Pont de Nemours & Co., Inc. (United States)

Published in SPIE Proceedings Vol. 0419:
Application of Optical Instrumentation in Medicine XI
Gary D. Fullerton, Editor(s)

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