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Hearing Thresholds Changes after MRI 1.5T of Head and Neck
Maryam Bahaloo1, Mohammad Hossein Davari1, Mohammad Sobhan2
1Industrial Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd 89138-14389, Iran.
Radiology Research and Practice
|July 19, 2019
Summary
Noise from 1.5 Tesla MRI scans can cause temporary hearing threshold shifts, but these effects are not permanent. Hearing tests before and after MRI confirm that auditory thresholds return to normal within 24 hours.
Area of Science:
- Audiology
- Medical Imaging Physics
Background:
- Magnetic Resonance Imaging (MRI) generates high-intensity noise, raising concerns about potential hearing damage.
- The impact of MRI noise on auditory thresholds requires investigation using precise audiometric methods.
Purpose of the Study:
- To assess the temporary and permanent effects of MRI noise on hearing thresholds.
- To evaluate hearing changes using both conventional and extended high-frequency audiometry.
Main Methods:
- A semiexperimental study involving 35 patients undergoing head and neck MRI at 1.5 Tesla.
- Hearing thresholds were measured pre-MRI, immediately post-MRI, and 24 hours post-MRI.
- Statistical analysis included paired t-tests and repeated measures analysis to compare hearing thresholds.
Main Results:
- Significant temporary shifts in auditory thresholds were observed immediately after MRI at 4 KHz, 6 KHz, and 14 KHz.
- No significant differences in hearing thresholds were found 24 hours after MRI exposure.
- Extended high-frequency audiometry revealed significant changes in hearing post-MRI.
Conclusions:
- Noise exposure from 1.5 Tesla MRI procedures results in transient threshold shifts.
- The hearing effects of MRI noise are temporary and do not lead to permanent hearing loss.
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