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Proceedings Paper

Selection of `subtle` cases for ROC studies
Author(s): David Gur; Jill L. King; Howard E. Rockette; Carl R. Fuhrman; Jules H. Sumkin M.D.
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Paper Abstract

Comparisons of imaging systems through observer performance studies involve the selection of images, including those with subtle abnormalities. The selection of subtle abnormalities is typically performed in a subjective manner and is not quantitative. To assess the validity of such a selection process, we analyzed 163 ROC data sets. The difference in observer performance summary indices (Az) between ''typical'' and ''subtle'' cases were evaluated for each set. Average difference was found to be 0.10 (Az ''typical'' - Az ''subtle''), and in only 4 instances of 163 comparisons, observer performance for the subtle cases increased by 0.01 ((Delta) Az). We conclude that although it is not quantitative, this approach to the selection of subtle abnormalities is appropriate for imaging systems comparisons using ROC- type studies.

Paper Details

Date Published: 1 July 1992
PDF: 3 pages
Proc. SPIE 1654, Medical Imaging VI: PACS Design and Evaluation, (1 July 1992); doi: 10.1117/12.60283
Show Author Affiliations
David Gur, Univ. of Pittsburgh (United States)
Jill L. King, Univ. of Pittsburgh (United States)
Howard E. Rockette, Univ. of Pittsburgh (United States)
Carl R. Fuhrman, Univ. of Pittsburgh (United States)
Jules H. Sumkin M.D., Univ. of Pittsburgh (United States)

Published in SPIE Proceedings Vol. 1654:
Medical Imaging VI: PACS Design and Evaluation
R. Gilbert Jost M.D., Editor(s)

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