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Proceedings Paper

Relationship between changes in pupil size over time and diagnostic accuracy
Author(s): Toru Matsumoto; Akira Furukawa; Megumu Tsuchikawa; Yuichi Fujino; Shusuke Sone
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Paper Abstract

The objective of this study was to measure the image exploration activity of physicians, and thereby contribute to the development of a support system for CRT image interpretation in thoracic CT screening. In this study, we examined how the pupil diameters of five physicians changes over time during interpretation of a large quantity of CT images on a CRT monitor, and how this might be related to the accuracy of diagnosis. The study showed that, when a large quantity of CT images were viewed through a CRT monitor in a dimly lit room, the pupil diameter decreased during the second half of the long interpretation procedure in three of the five physicians. Furthermore, the pupil diameter frequently became approximately zero because the physician became drowsy. However, when the relationship between these phenomena and the accuracy of diagnosis was analyzed in one of the physicians, proof that such phenomena might lead to statistically significant false negatives or false positives was not found. Despite such results, the potential risk of misdiagnosis cannot be ignored. It may be necessary to devise both equipment and work conditions that will not cause the pupil diameter to become approximately zero during interpretation of images on a CRT monitor.

Paper Details

Date Published: 22 May 2003
PDF: 10 pages
Proc. SPIE 5034, Medical Imaging 2003: Image Perception, Observer Performance, and Technology Assessment, (22 May 2003); doi: 10.1117/12.480084
Show Author Affiliations
Toru Matsumoto, National Institute of Radiological Sciences (Japan)
Akira Furukawa, National Institute of Radiological Sciences (Japan)
Megumu Tsuchikawa, Nippon Telegraph and Telephone Lab. (Japan)
Yuichi Fujino, Nippon Telegraph and Telephone Lab. (Japan)
Shusuke Sone, JA Azumi General Hospital (Japan)


Published in SPIE Proceedings Vol. 5034:
Medical Imaging 2003: Image Perception, Observer Performance, and Technology Assessment
Dev P. Chakraborty; Elizabeth A. Krupinski, Editor(s)

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