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Eye movement during computed tomography interpretation: eyetracker results and image display-time implications
D V Beard1, E D Pisano, K M Denelsbeck
1Department of Radiology, University of North Carolina School of Medicine, Chapel Hill 27599-7510.
Journal of Digital Imaging
|November 1, 1994
Summary
Stacked displays on low-cost workstations can enable efficient review of multiple computed tomography (CT) studies. Eye-tracking shows stacked displays can match radiologist eye movements for acceptable CT interpretation.
Area of Science:
- Radiology and Medical Imaging
- Human-Computer Interaction
- Medical Informatics
Background:
- Stacked displays offer a potential solution for interpreting multiple computed tomography (CT) studies using affordable workstations.
- A key concern is whether stacked displays can match the speed of radiologist eye movements for efficient image review.
Purpose of the Study:
- To evaluate the feasibility of stacked displays for multi-study CT interpretation by measuring eye-movement duration.
- To determine if stacked display technology can support rapid image scrolling comparable to traditional film review.
Main Methods:
- An electronic eye tracker was used to record radiologist eye-movement durations during CT chest interpretation.
- Time-motion analysis was performed to assess image display times and interaction efficiency on a stacked display system.
Main Results:
- Average duration for adjacent eye movements (sequential image viewing) was recorded at 0.54 seconds.
- The CT workstation with a stacked approach demonstrated an image display time of 0.2 seconds, achieving next-image display in under 0.4 seconds.
Conclusions:
- Stacked display technology on low-cost workstations appears capable of facilitating acceptable interpretation of multiple CT and magnetic resonance studies.
- Further research is needed to address the impact of non-adjacent eye movements and potential effects on radiologist behavior.