Title: Accuracy of measurements on digital videostroboscopic images of the vocal folds
Authors: Speyer, Renée ×
Wieneke, George H
Kersing, Willem
Dejonckere, Philippe #
Issue Date: Jul-2005
Series Title: Annals of Otology, Rhinology and Laryngology vol:114 issue:6 pages:443-50
Abstract: OBJECTIVES: The reliability of objective measurements on digital laryngeal images was investigated. METHODS: The magnitude of the error of measurement of surface areas by visually tracing the outline was determined for three different areas: the area of the lesion and, during vibration, the glottal area on maximal opening of the vocal folds and the glottal area on maximal closing of the vocal folds. RESULTS: The errors in these areas were 10% to 30%. The results suggest that the error is mainly due to the uncertainty of the real outline of areas with a vague boundary. Correction for differences in magnification between two images (posttherapy and pretherapy) is of importance in about 25% to 65% of cases, depending on the area measured. CONCLUSIONS: Only when the magnification ratio is small (less than about +/- 10% from 1.0) may a correction not be necessary.
ISSN: 0003-4894
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Research Group Experimental Oto-rhino-laryngology
× corresponding author
# (joint) last author

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