An Investigation of MR Imaging Scanner Noise and its Effect on Technologists

To investigate the level of noise that magnetic resonance (MR) technologists are exposed to during daily tasks, and prevalence of hearing loss among MR technologists.

Decibel levels at the scanner control panel were measured and recorded at clinical facilities. A survey was distributed to MR technologists, which included questions about demographics, workplace habits, and self-reported hearing loss.

Technologists are exposed to decibel levels higher than U.S. government recommended occupational limits; however, these are for very short periods, resulting in an average projected 8-hour noise dose of 1.68%. Statistical analysis of survey results showed no association between time spent working in an MR imaging department (P = .111); however, results did show an association between entering the scan room during image acquisition and hearing loss (P = .005).

At times, technologists are exposed to decibel levels exceeding the U.S. Occupational Safety and Health Administration and the U.S. Food and Drug Administration recommended limits; however, the average findings indicate that there is a low risk of hearing damage from working at the control panel. Statistical analysis revealed an association between entering the scan room and hearing loss; therefore, individuals entering the scan room for any reason should be wearing hearing protection, even for short periods.

Risks of exposure to high occupational decibel levels should be monitored continually. This study provides a foundation for future research studies, such as longitudinal analysis of hearing loss in MR technologists.