How does observer training affect imaging performance in digital mammography?

Walter Huda; Guoying Qu; Zhenxue Jing; Barbara G. Steinbach; Janice C. Honeyman-Buck

doi:10.1117/12.383117

14 April 2000 How does observer training affect imaging performance in digital mammography?

Walter Huda, Guoying Qu, Zhenxue Jing, Barbara G. Steinbach, Janice C. Honeyman-Buck

Proceedings Volume 3981, Medical Imaging 2000: Image Perception and Performance; (2000) https://doi.org/10.1117/12.383117
Event: Medical Imaging 2000, 2000, San Diego, CA, United States

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 (A_z). 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 A_z 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.

Citation Download Citation

Walter Huda, Guoying Qu, Zhenxue Jing, Barbara G. Steinbach, and Janice C. Honeyman-Buck "How does observer training affect imaging performance in digital mammography?", Proc. SPIE 3981, Medical Imaging 2000: Image Perception and Performance, (14 April 2000); https://doi.org/10.1117/12.383117

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