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Effect of MRI noise on cochlear function

P Radomskij1, M A Schmidt, C W Heron

  • 1Magnetic Resonance Unit and Department of Audiology, St George's Hospital, London, UK. p.radomskij@ucl.ac.uk

Lancet (London, England)
|May 4, 2002
PubMed

Insights

Magnetic resonance imaging (MRI) causes cochlear damage, measurable by otoacoustic emissions (OAEs). Even with earplugs, MRI noise negatively impacts hearing function, highlighting the need for effective hearing protection.

Area of Science:

  • Audiology
  • Biomedical Engineering
  • Otoacoustic Emissions

Background:

  • Magnetic resonance imaging (MRI) procedures generate significant noise levels, potentially harming auditory function.
  • Otoacoustic emissions (OAEs) offer a non-invasive method to assess cochlear health and function.

Purpose of the Study:

  • To quantify the impact of MRI-generated noise on cochlear function using otoacoustic emissions (OAEs).
  • To evaluate the effectiveness of standard earplugs in mitigating noise-induced cochlear effects during MRI.

Main Methods:

  • Otoacoustic emissions (OAEs) were measured in 16 patients before and after undergoing MRI.
  • A control group of 16 individuals, not exposed to MRI, was monitored over the same period.
  • Comparison of OAE measurements between the patient and control groups.

Main Results:

  • A statistically significant decrease in OAEs was observed in patients following MRI exposure.
  • The control group exhibited no significant changes in OAEs during the study period.
  • The findings indicate a detrimental effect of MRI noise on cochlear function, even when earplugs are used.

Conclusions:

  • MRI-generated noise adversely affects cochlear function, as evidenced by changes in OAEs.
  • Standard earplugs may not provide sufficient protection against MRI noise-induced hearing effects.
  • The critical importance of properly fitted and effective hearing protection during MRI scans is emphasized.

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