Image interpretation in CT of laryngeal carcinoma: a study on intra- and interobserver reproducibility |
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Authors: | R Hermans A Van der Goten A L Baert |
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Institution: | (1) Department of Radiology, University Hospitals KU Leuven, Herestraat 49, B-3000 Leuven, Belgium, BE |
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Abstract: | The object of our study was to evaluate the intra- and interobserver reproducibility of the interpretation of CT examinations
of laryngeal carcinoma. The CT examinations of 100 laryngeal cancers were retrospectively reviewed twice by two independent
reviewers. Involvement of different structures was assessed, using a standard scoring form. Statistical analysis was done
using the Wilcoxon signed rank test and Cohen's kappa. A borderline significant difference between the observers (p < 0.04) was present. Fair to substantial intraobserver reproducibility (kappa = 0.29–0.86), and fair to substantial interobserver
reproducibility (average kappa = 0.26–0.74) were found for most laryngeal structures when a dichotomous categorical scale
was used. On the average somewhat lower, but still fair to substantial, intraobserver (kappa = 0.36–0.72), and fair to moderate
interobserver (average kappa = 0.29–0.47) reproducibility, were found when a nominal or ordinal categorical scale was used.
In conclusion, the interpretation of CT images of laryngeal tumors is reproducible.
Received 4 November 1996; Revision received 27 December 1996; Accepted: 2 January 1997 |
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Keywords: | : Larynx CT Larynx neoplasms Head and neck neoplasms |
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