The effect of magnetic resonance imaging noise on cochlear function in dogs

Venn, R.E., McBrearty, A.R., McKeegan, D. and Penderis, J. (2014) The effect of magnetic resonance imaging noise on cochlear function in dogs. Veterinary Journal, 202(1), pp. 141-145. (doi: 10.1016/j.tvjl.2014.07.006)

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Noise produced by magnetic resonance imaging (MRI) scanners (which can peak at a sound pressure level of 131 dB) has been shown to cause noise-induced cochlear dysfunction in people. The aim of this study was to investigate whether noise produced during MRI had a deleterious effect on cochlear function in dogs, using distortion product otoacoustic emission (DPOAE) testing, which allows frequency specific, non-invasive assessment of cochlear function. DPOAE testing was performed before and after MRI in one or both ears under general anaesthesia at 14 frequency pairs (f2 frequency ranging from 0.84 kHz to 8.0 kHz). A control group comprised dogs undergoing anaesthesia of a similar duration for quiet procedures. Thirty-six dogs (66 ears) and 17 dogs (28 ears) were included in the MRI and control groups respectively.<p></p> There was a reduction in DPOAE at all frequencies tested in the MRI group; a similar effect was not evident in the control group. This reduction in the MRI group was statistically significant in five of the 14 frequencies assessed (P < 0.05). These results demonstrate that exposure to MRI noise results in a significant reduction in frequency-specific cochlear function in dogs, although it is not known whether this is reversible or permanent. This suggests that all dogs undergoing MRI studies should be provided with ear protection as a routine precautionary measure.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Penderis, Professor Jacques and McBrearty, Dr Alix and McKeegan, Dr Dorothy
Authors: Venn, R.E., McBrearty, A.R., McKeegan, D., and Penderis, J.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Veterinary Journal
Publisher:Elsevier Ltd.
ISSN (Online):1532-2971

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