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Proceedings Paper

Implementation of combined SVM-algorithm and computer-aided perception feedback for pulmonary nodule detection
Author(s): Mariusz W. Pietrzyk; Didier Rannou; Patrick C. Brennan
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Paper Abstract

This pilot study examines the effect of a novel decision support system in medical image interpretation. This system is based on combining image spatial frequency properties and eye-tracking data in order to recognize over and under calling errors. Thus, before it can be implemented as a detection aided schema, training is required during which SVMbased algorithm learns to recognize FP from all reported outcomes, and, FN from all unreported prolonged dwelled regions. Eight radiologists inspected 50 PA chest radiographs with the specific task of identifying lung nodules. Twentyfive cases contained CT proven subtle malignant lesions (5-20mm), but prevalence was not known by the subjects, who took part in two sequential reading sessions, the second, without and with support system feedback. MCMR ROC DBM and JAFROC analyses were conducted and demonstrated significantly higher scores following feedback with p values of 0.04, and 0.03 respectively, highlighting significant improvements in radiology performance once feedback was used. This positive effect on radiologists' performance might have important implications for future CAD-system development.

Paper Details

Date Published: 22 February 2012
PDF: 9 pages
Proc. SPIE 8318, Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, 831815 (22 February 2012); doi: 10.1117/12.911577
Show Author Affiliations
Mariusz W. Pietrzyk, The Univ. of Sydney (Australia)
Didier Rannou, The Univ. of Sydney (Australia)
Institut Superieur de l'Electronique et du Numerique (France)
Patrick C. Brennan, The Univ. of Sydney (Australia)


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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