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Proceedings Paper

Comparison of sensitivity and reading time for the use of computer aided detection (CAD) of pulmonary nodules at MDCT as concurrent or second reader
Author(s): F. Beyer; L. Zierott; E. M. Fallenberg; K. Juergens; J. Stoeckel; W. Heindel; D. Wormanns
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Paper Abstract

Purpose: To compare sensitivity and reading time when using CAD as second reader resp. concurrent reader. Materials and Methods: Fifty chest MDCT scans due to clinical indication were analysed independently by four radiologists two times: First with CAD as concurrent reader (display of CAD results simultaneously to the primary reading by the radiologist); then after a median of 14 weeks with CAD as second reader (CAD results were shown after completion of a reading session without CAD). A prototype version of Siemens LungCAD (Siemens,Malvern,USA) was used. Sensitivities and reading times for detecting nodules ≥4mm of concurrent reading, reading without CAD and second reading were recorded. In a consensus conference false positive findings were eliminated. Student's T-Test was used to compare sensitivities and reading times. Results: 108 true positive nodules were found. Mean sensitivity was .68 for reading without CAD, .68 for concurrent reading and .75 for second reading. Differences of sensitivities were significant between concurrent and second reading (p<.001) resp. reading without CAD and second reading (p=.001). Mean reading time for concurrent reading was significant shorter (274s) compared to reading without CAD (294s;p=.04) and second reading (337s;p<.001). New work to be presented: To our knowledge this is the first study that compares sensitivities and reading times between use of CAD as concurrent resp. second reader. Conclusion: CAD can either be used to speed up reading of chest CT cases for pulmonary nodules without loss of sensitivity as concurrent reader -OR (and not AND) to increase sensitivity and reading time as second reader.

Paper Details

Date Published: 17 March 2006
PDF: 13 pages
Proc. SPIE 6146, Medical Imaging 2006: Image Perception, Observer Performance, and Technology Assessment, 614617 (17 March 2006); doi: 10.1117/12.652051
Show Author Affiliations
F. Beyer, Univ. Hospital of Muenster (Germany)
L. Zierott, Univ. Hospital of Muenster (Germany)
E. M. Fallenberg, Univ. Hospital of Muenster (Germany)
K. Juergens, Univ. Hospital of Muenster (Germany)
J. Stoeckel, Siemens Medical Solutions (United States)
W. Heindel, Univ. Hospital of Muenster (Germany)
D. Wormanns, Univ. Hospital of Muenster (Germany)
Evangelic Chest Hospital Berlin (Germany)

Published in SPIE Proceedings Vol. 6146:
Medical Imaging 2006: Image Perception, Observer Performance, and Technology Assessment
Yulei Jiang; Miguel P. Eckstein, Editor(s)

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