Is diagnostic accuracy for detecting pulmonary nodules in chest CT reduced after a long day of reading?

Elizabeth A. Krupinski, Kevin S. Berbaum, Robert Caldwell, Kevin M. Schartz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Radiologists are reading more cases with more images, especially in CT and MRI and thus working longer hours than ever before. There have been concerns raised regarding fatigue and whether it impacts diagnostic accuracy. This study measured the impact of reader visual fatigue by assessing symptoms, visual strain via dark focus of accommodation, and diagnostic accuracy. Twenty radiologists and 20 radiology residents were given two diagnostic performance tests searching CT chest sequences for a solitary pulmonary nodule before (rested) and after (tired) a day of clinical reading. 10 cases used free search and navigation, and the other 100 cases used preset scrolling speed and duration. Subjects filled out the Swedish Occupational Fatigue Inventory (SOFI) and the oculomotor strain subscale of the Simulator Sickness Questionnaire (SSQ) before each session. Accuracy was measured using ROC techniques. Using Swensson's technique yields an ROC area = 0.86 rested vs. 0.83 tired, p (one-tailed) = 0.09. Using Swensson's LROC technique yields an area = 0.73 rested vs. 0.66 tired, p (one-tailed) = 0.09. Using Swensson's Loc Accuracy technique yields an area = 0.77 rested vs. 0.72 tired, p (one-tailed) = 0.13). Subjective measures of fatigue increased significantly from early to late reading. To date, the results support our findings with static images and detection of bone fractures. Radiologists at the end of a long work day experience greater levels of measurable visual fatigue or strain, contributing to a decrease in diagnostic accuracy. The decrease in accuracy was not as great however as with static images.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2012
Subtitle of host publicationImage Perception, Observer Performance, and Technology Assessment
EditorsCraig K. Abbey, Claudia R. Mello-Thoms
PublisherSPIE
ISBN (Electronic)9780819489678
DOIs
StatePublished - Jan 1 2012
EventMedical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment - San Diego, United States
Duration: Feb 8 2012Feb 9 2012

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8318
ISSN (Print)1605-7422

Conference

ConferenceMedical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment
CountryUnited States
CitySan Diego
Period2/8/122/9/12

Keywords

  • CT
  • Fatigue
  • Observer performance
  • Visual search

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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  • Cite this

    Krupinski, E. A., Berbaum, K. S., Caldwell, R., & Schartz, K. M. (2012). Is diagnostic accuracy for detecting pulmonary nodules in chest CT reduced after a long day of reading? In C. K. Abbey, & C. R. Mello-Thoms (Eds.), Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment [83180X] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8318). SPIE. https://doi.org/10.1117/12.910748