Computer-aided detection for CT colonography: incremental benefit of observer training

The British Journal of Radiology
S A TaylorSteve Halligan

Abstract

The purpose of this study was to investigate the incremental effect of focused training on observer performance when using computer-assisted detection (CAD) software to interpret CT colonography (CTC). Six radiologists who were relatively inexperienced with CTC interpretation underwent 1 day of focused training before reading 20 patient datasets with the assistance of CAD software (ColonCAR 1.3, Medicsight PLC). Sensitivity, specificity and interpretation times were determined and compared with previous performance when reading the same datasets but without the benefit of focused training, using the binomial exact test and Wilcoxon's signed rank test. Per-polyp sensitivity improved after training by 18% overall (95% confidence interval (CI): 14-24%, p<0.001) and was greatest for polyps of 6-9 mm (26%, 95% CI: 18-34%, p<0.001). Absolute sensitivity was 23% (9-36%), 51% (33-71%) and 74% (44-100%) for polyps of <or=5 mm, 6-9 mm and >or=10 mm, respectively. Specificity fell significantly after focused training (median of 5.5 false positives per 20 datasets (interquartile range (IQR): 4-6) post-training vs median of 2.5 (IQR: 1-5) pre-training, p = 0.03). Interpretation time also increased significantly after training (from a median...Continue Reading

References

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Dec 6, 2003·The New England Journal of Medicine·Perry J PickhardtWilliam R Schindler
Feb 12, 2004·European Radiology·Stuart A TaylorClive I Bartram
Apr 15, 2004·JAMA : the Journal of the American Medical Association·Peter B CottonHarold Butler
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May 17, 2006·European Radiology·Andrew SlaterSteve Halligan

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Citations

Jun 16, 2012·Radiology·Marjolein M N LeeuwenburghJaap Stoker
Mar 27, 2012·European Radiology·Diederick W De BooCornelia M Schaefer-Prokop
Feb 18, 2009·The British Journal of Radiology
Apr 8, 2011·Nihon Hoshasen Gijutsu Gakkai zasshi·Toshihiro Ogura Et Al
Sep 18, 2012·European Radiology·Emanuele NeriUNKNOWN ESGAR CT Colonography Working Group
May 19, 2012·European Journal of Radiology·Daniele Regge, Steve Halligan

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