The effect of computer-aided detection markers on ...

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Dec 9, 2014 - Lancaster Medical School, Faculty of Health & Medicine, ..... sota, USA) and iCAD (iCAD Inc., Fairborn, Ohio, USA) provided a medical image ...
Eur Radiol DOI 10.1007/s00330-014-3569-z

GASTROINTESTINAL

The effect of computer-aided detection markers on visual search and reader performance during concurrent reading of CT colonography Emma Helbren & Thomas R. Fanshawe & Peter Phillips & Susan Mallett & Darren Boone & Alastair Gale & Douglas G. Altman & Stuart A. Taylor & David Manning & Steve Halligan

Received: 22 June 2014 / Revised: 9 December 2014 / Accepted: 15 December 2014 # European Society of Radiology 2015

D. Manning Lancaster Medical School, Faculty of Health & Medicine, Lancaster University, Lancaster, UK

experienced, 25 inexperienced) interpreted the videos during infrared visual search recording. CAD markers and polyps were treated as regions of interest in data processing. This multi-reader, multi-case study was analysed using multilevel modelling. Results CAD drew readers’ attention to polyps faster, accelerating identification times: median ‘time to first pursuit’ was 0.48 s (IQR 0.27 to 0.87 s) with CAD, versus 0.58 s (IQR 0.35 to 1.06 s) without. For inexperienced readers, CAD also held visual attention for longer. All visual search metrics used to assess visual gaze behaviour demonstrated statistically significant differences when “with” and “without” CAD were compared. A significant increase in the number of correct polyp identifications across all readers was seen with CAD (74 % without CAD, 87 % with CAD; p200 prior CTC cases) and recruited at a subspecialty conference. Twenty-five were inexperienced (defined as

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