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Proceedings Paper

How does observer training affect imaging performance in digital mammography?
Author(s): Walter Huda; Guoying Qu; Zhenxue Jing; Barbara G. Steinbach; Janice C. Honeyman-Buck
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Paper Abstract

Simulated mass lesions, superimposed onto an anthropomorphic breast phantom, were x-rayed using a small field of view digital mammography system. Eight radiologists and four scientists viewed the phantom images on a display monitor in a darkened room. Five readers had prior experience of reading these type of images. Readers assessed the probability of a simulated mass being present in each ROI, with the resultant data used to plot the corresponding Receiver Operating Characteristic (ROC) curves, and determine the corresponding area under the ROC curve (Az). Readers viewed the same set of images five successive times in a single session, and the time taken to read each image was recorded. The average time to complete the study for all twelve observers was 24 minutes (71 seconds/image). Experienced readers were quicker than novices, and radiologists were quicker than the scientists. The average Az value for the twelve readers for this detection task was 0.842 +/- 0.037 with coefficient of variations for individual readers ranging from 2.1% to 7.7%. Differences in imaging performance between the radiologists and scientists were very small. Analysis of the trends in measured imaging performance for each reader viewing successive (repeat) images showed that there was no improvement in imaging performance with increasing experience.

Paper Details

Date Published: 14 April 2000
PDF: 8 pages
Proc. SPIE 3981, Medical Imaging 2000: Image Perception and Performance, (14 April 2000); doi: 10.1117/12.383117
Show Author Affiliations
Walter Huda, SUNY Upstate Medical Univ. (United States)
Guoying Qu, Univ. of Florida (United States)
Zhenxue Jing, Univ. of Florida (United States)
Barbara G. Steinbach, Univ. of Florida (United States)
Janice C. Honeyman-Buck, Univ. of Florida (United States)

Published in SPIE Proceedings Vol. 3981:
Medical Imaging 2000: Image Perception and Performance
Elizabeth A. Krupinski, Editor(s)

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