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Proceedings Paper

Performance metric for evaluating conformance of medical image displays with the proposed ACR/NEMA display function standard
Author(s): Bradley M. Hemminger; Keith E. Muller
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Paper Abstract

ACR/NEMA has released for public comment the display function standard document. This standard, produced by ACR/NEMA Working Group XI, has been developed in order to solve the problem of standardizing the response of grey scale display systems. This paper presents a methodology proposed in the display function standard for quantitatively calculating the conformance of a display device to the standard display function based on statistical measures, which are referred to as the linearization uniformity measures (LUM). There are two LUM measures, R2, or global uniformity, and root mean square error, or local uniformity. The derivation of both measures is described. Two additional measures that provide a better description of the achievable dynamic range of a display device than simply its luminance range are also described, the theoretical number of just noticeable differences (JNDS) of the display, and the realized number of JNDS of the display. Currently available medical image display systems are analyzed using each of these measures, to examine their shortcomings, and suggest what changes might be desirable in the design of medical image display systems in the future.

Paper Details

Date Published: 7 May 1997
PDF: 10 pages
Proc. SPIE 3031, Medical Imaging 1997: Image Display, (7 May 1997); doi: 10.1117/12.273902
Show Author Affiliations
Bradley M. Hemminger, Univ. of North Carolina/Chapel Hill (United States)
Keith E. Muller, Univ. of North Carolina/Chapel Hill (United States)

Published in SPIE Proceedings Vol. 3031:
Medical Imaging 1997: Image Display
Yongmin Kim, Editor(s)

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