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Proceedings Paper

Film-Screen Speed System Considerations
Author(s): R. S. Holland
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Paper Abstract

The broad speed classes into which film-screen receptor systems are now commonly grouped create considerable confusion and uncertainty in relating exposure and dose to properly exposed films. Practical speeds become even less certain by relating the whole speed scale to a reference system which is not uniquely defined. A system to overcome these difficulties is proposed, in the form of a scale of absolute speeds, based on a recent ANSI test method, and grouping resultant speeds into narrower classes. Data are presented which relate this recommended speed class width to allowable density ranges and to typical distributions of product speed.

Paper Details

Date Published: 28 August 1984
PDF: 8 pages
Proc. SPIE 0486, Medical Imaging and Instrumentation '84, (28 August 1984); doi: 10.1117/12.943202
Show Author Affiliations
R. S. Holland, E.I.du Pont de Nemours & Co., Inc. (United States)


Published in SPIE Proceedings Vol. 0486:
Medical Imaging and Instrumentation '84
James A. Mulvaney, Editor(s)

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