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14 April 2000 Unobtrusive method for monitoring visual attention during mammogram reading
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The use of feedback to the observer of the regions of the image that attract prolonged visual dwell (> 1000 ms) has been shown to improve nodule detection performance in reading chest x-rays. The application of such a feedback mechanism in mammography seems appropriate, but it is often discouraged by the inherent difficulties of using an invasive eye-tracking system. In this paper we discuss the use of an alternative method, namely, a digital zoom window, to monitor where the observer's attention is focused on the image. We have shown that the order in which the zooms occur, as well as the duration of certain zooms, is statistically correlated with decision outcome for a given region of the image. Furthermore we show a strong correlation between zooming and prolonged fixation.
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Claudia Mello-Thoms, Calvin F. Nodine, Susan P. Weinstein, Harold L. Kundel, and Lawrence C. Toto "Unobtrusive method for monitoring visual attention during mammogram reading", Proc. SPIE 3981, Medical Imaging 2000: Image Perception and Performance, (14 April 2000);

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