Reproducibility of volume measurements of vestibular schwannomas - a preliminary study

Clinical Otolaryngology : Official Journal of ENT-UK ; Official Journal of Netherlands Society for Oto-Rhino-Laryngology & Cervico-Facial Surgery
J J CrossA T Prevost

Abstract

A preliminary study to investigate the intra-observer and inter-observer variability of measurements of vestibular schwannoma volume using an area-tracing and linear dimension measurement method. Prospective blinded measurements by two observers (one a consultant and one a sub-specialty trainee in neuroradiology). Ambulatory patients with known vestibular schwannoma attending a tertiary referral centre. Twenty-three patients with 26 vestibular schwannomas aged 29-80 years old. Quantification of the variability in measured volume due to intra- and inter-observer measurement differences, expressed as reliability coefficients within which 95% of repeated measurements are calculated to lie from each other in relative percentage terms. For the linear measurement method, intraobserver variability was calculated to have a reliability coefficient of 65% and for interobserver variability this was 155%. For the area tracing method, the corresponding coefficients were 26% for intraobserver variability and 44% for interobserver variability. Volume measurements in vestibular schwannoma are variable even when the measurements are made by the same observer on identical images. The area tracing method, commonly regarded as the gold standard, i...Continue Reading

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Citations

Dec 3, 2009·Neurosurgical Focus·Alberto FranzinPietro Mortini
Jan 21, 2014·American Journal of Otolaryngology·Dan HougaardTherese Ovesen
Mar 2, 2011·Clinical Radiology·N Sriskandan, S E J Connor
May 27, 2010·Clinical Otolaryngology : Official Journal of ENT-UK ; Official Journal of Netherlands Society for Oto-Rhino-Laryngology & Cervico-Facial Surgery·J K VarugheseM Lund-Johansen
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Dec 4, 2019·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Alexander D SherryAnthony J Cmelak

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