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Proceedings Paper

Performance analysis of medical x-ray film digitizers
Author(s): Kwok Leung Yip; Anthony Richard Lubinsky; Bruce R. Whiting; Edward Muka; Thomas E. Kocher
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Paper Abstract

A system model for analyzing degradation in the image quality of a radiograph introduced by a film digitizer is presented. The analysis is an extension of the screen-film model of Shaw and VanMetter (SPIE 454, 128-141(1984)). By combining the screen-film characteristics for specific exam types with the properties (e.g., MTF and NPS) of a particular scanner design, the information transfer of the whole digital system can be determined. As an example, the performance of two typical film digitizers, a CCD-based scanner and a laser-based scanner, are evaluated and compared. Image quality descriptors, such as DQE and NEQ as well as equivalent bandwidth and system aperture, are used for the evaluation. By incorporating the human observer's threshold response to changes in noise levels (just noticeable differences), a criterion for negligible loss of image information can be established. This can be very useful for system optimization and determination of design tradeoffs.

Paper Details

Date Published: 1 July 1990
PDF: 18 pages
Proc. SPIE 1231, Medical Imaging IV: Image Formation, (1 July 1990); doi: 10.1117/12.18832
Show Author Affiliations
Kwok Leung Yip, Eastman Kodak Co. (United States)
Anthony Richard Lubinsky, Eastman Kodak Co. (United States)
Bruce R. Whiting, Eastman Kodak Co. (United States)
Edward Muka, Eastman Kodak Co. (United States)
Thomas E. Kocher, Eastman Kodak Co. (United States)

Published in SPIE Proceedings Vol. 1231:
Medical Imaging IV: Image Formation
Roger H. Schneider, Editor(s)

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