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Proceedings Paper

Evaluation of the effect of display luminance on the feature-detection rates of masses in mammograms
Author(s): Bradley M. Hemminger; Alan W. Dillon; Richard Eugene Johnston
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Paper Abstract

The purpose of this study was to determine the interaction of the luminance range of the display system with the feature detection rate for detecting simulated masses in mammograms. Simulated masses were embedded in cropped 512 by 512 portions of mammograms digitized at 50 micron pixels, 12 bits deep. The masses were embedded in one of four quadrants in the image. An observer experiment was conducted where the observer's task was to determine in which quadrant the mass is located. The key variables involved in each trial included the exposition of the mass, the contrast level of the mass, and the luminance of the display. The contrast of the mass with respect to the background was fixed to one of four selected contrast levels. The digital images were printed to film, and displayed on a mammography lightbox. The display luminance was controlled by the placing neutral density films between the laser printed films of mammogrpahic backgrounds and the lightbox. The resulting luminances examined in this study ranged from a maximum of 10 ftL to 600 ftL. Twenty observers viewed 20 different combinations of the 5 neutral density filters with the 4 contrast levels, for a total of 400 observations per observer, and 8000 observations overall. An ANOVA analysis showed that there was no statistically significant correlation between the luminance range of the display and the feature detection rate of the simulated masses in mammograms. None of the luminance display ranges performed better than any of the others.

Paper Details

Date Published: 16 April 1997
PDF: 11 pages
Proc. SPIE 3036, Medical Imaging 1997: Image Perception, (16 April 1997); doi: 10.1117/12.271282
Show Author Affiliations
Bradley M. Hemminger, Univ. of North Carolina/Chapel Hill (United States)
Alan W. Dillon, Univ. of North Carolina/Chapel Hill (United States)
Richard Eugene Johnston, Univ. of North Carolina/Chapel Hill (United States)

Published in SPIE Proceedings Vol. 3036:
Medical Imaging 1997: Image Perception
Harold L. Kundel, Editor(s)

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