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Proceedings Paper

iPads and LCDs show similar performance in the detection of pulmonary nodules
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Paper Abstract

In February 2011 the University of Chicago Medical School distributed iPads to its trainee doctors for use when reviewing clinical information and images on the ward or clinics. The use of tablet computing devices is becoming widespread in medicine with Apple™ heralding them as "revolutionary" in medicine. The question arises, just because it is technical achievable to use iPads for clinical evaluation of images, should we do so? The current work assesses the diagnostic efficacy of iPads when compared with LCD secondary display monitors for identifying lung nodules on chest x-rays. Eight examining radiologists of the American Board of Radiology were involved in the assessment, reading chest images on both the iPad and the an off-the-shelf LCD monitor. Thirty chest images were shown to each observer, of which 15 had one or more lung nodules. Radiologists were asked to locate the nodules and score how confident they were with their decision on a scale of 1-5. An ROC and JAFROC analysis was performed and modalities were compared using DBM MRMC. The results demonstrate no significant differences in performance between the iPad and the LCD for the ROC AUC (p<0.075) or JAFROC FOM (p<0.059) for random readers and random cases. Sample size estimation showed that this result is significant at a power of 0.8 and an effect size of 0.05 for ROC and 0.07 for JAFROC. This work demonstrates that for the task of identifying pulmonary nodules, the use of the iPad does not significantly change performance compared to an off-the-shelf LCD.

Paper Details

Date Published: 28 February 2012
PDF: 9 pages
Proc. SPIE 8318, Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, 83180C (28 February 2012); doi: 10.1117/12.913754
Show Author Affiliations
Mark F. McEntee, The Univ. of Sydney (Australia)
Joanna Lowe, Univ. College Dublin (Ireland)
Marie Louise Butler, Univ. College Dublin (Ireland)
Mariusz Pietrzyk, The Univ. of Sydney (Australia)
Michael G. Evanoff, The American Board of Radiology (United States)
John Ryan, Ziltron Ltd (United States)
Patrick C. Brennan, The Univ. of Sydney (Australia)
Louise A. Rainford, Univ. College Dublin (Ireland)

Published in SPIE Proceedings Vol. 8318:
Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment
Craig K. Abbey; Claudia R. Mello-Thoms, Editor(s)

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