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Proceedings Paper

Free-response receiver operating characteristic analysis in medical imaging
Author(s): Dev Prasad Chakraborty; Inna Brikman
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Paper Abstract

Recently we have introduced a method for analyzing Free-response Receiver Operating Characteristic (FROC) experiments. These differ from traditional ROC observer performance experiments by allowing for multiple abnormalities and observer responses per image, and by requiring correct localization for true positive events. We introduced the Alternative FROC (AFROC) plot which is analogous to the ROC plot, and the area under it, which is analogous to the area parameter of ROC methodology. Subsequently we have extended the analysis with a new way of scoring FROC images, termed AFROC analysis. This renders unnecessary the Poisson assumption used in the earlier paper. We also introduced the Free-response Forced Error (FFE) experiment which renders unnecessary the Gaussian distribution assumption of FROC and AFROC analysis. FROC/FFE experiments performed with synthetic images (disk objects at random locations on a noise background) which illustrate the FROC methodology are presented. We wish to bring to the attention of PACS researchers that rather sophisticated efficacy analysis, which has several advantages over the standard ROC approach, is made possible through this methodology.

Paper Details

Date Published: 1 August 1990
PDF: 10 pages
Proc. SPIE 1234, Medical Imaging IV: PACS Systems Design and Evaluation, (1 August 1990); doi: 10.1117/12.18963
Show Author Affiliations
Dev Prasad Chakraborty, Hospital of the Univ. of Pennsylvania (United States)
Inna Brikman, Hospital of the Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 1234:
Medical Imaging IV: PACS Systems Design and Evaluation
Samuel J. Dwyer III; R. Gilbert Jost M.D., Editor(s)

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