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Interventional MR imaging at 1.5 T: quantification of sound exposure
Adriaan Moelker1, Ronald A J J Maas, Franck Lethimonnier
1Department of Radiology, Erasmus University Medical Center Rotterdam, 50 Dr Molewaterplein, P.O. Box 1738, the Netherlands. moelker@rdiag.fgg.eur.nl
Abstract:
Sound pressure levels (SPLs) during interventional magnetic resonance (MR) imaging may create an occupational hazard for the interventional radiologist (ie, the potential risk of hearing impairment). Therefore, A-weighted and linear continuous-equivalent SPLs were measured at the entrance of a 1.5-T MR imager during cardiovascular and real-time pulse sequences. The SPLs ranged from 81.5 to 99.3 dB (A-weighted scale), and frequencies were from 1 to 3 kHz. SPLs for the interventional radiologist exceeded a safe SPL of 80 dB (A-weighted scale) for all sequences; therefore, hearing protection is recommended.