Eye movement during computed tomography interpretation: eyetracker results and image display-time implications.
Stacked displays hold the potential for accurate interpretation of multiple computed tomography (CT) studies on a low-cost workstation. But can such a display scroll as quickly as radiologists can move their eyes to the next image on a film? To address this question, eye-movement duration during CT chest interpretation was recorded using an electronic eye tracker. Adjacent eye movements (+/- 1 image in sequence) averaged 0.54 seconds. Time motion analysis indicates that a CT workstation using a stacked approach with a 0.2-second image display time and a simple interaction can display the next image in less than 0.4 seconds, so a stacked approach should allow a low-cost workstation to facilitate acceptable interpretation of multiple CT or magnetic resonance studies. However, nonadjacent eye movements is likely to take longer and radiologist behavior may be effected.
Department of Radiology, University of North Carolina School of Medicine, Chapel Hill 27599-7510.
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Beard
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Pisano
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Denelsbeck
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Johnston
D003626:Data Display; D005133:Eye Movements; D006801:Humans; D010364:Pattern Recognition, Visual; D011873:Radiology Information Systems; D013996:Time and Motion Studies; D014057:Tomography, X-Ray Computed; D014743:Videotape Recording