Acoustic Noise

Acoustic noise is created when current is passed through the gradient coils during image acquisition. Although these levels are anticipated to be well below the OSHA standards for a hearing loss prevention program must be started (80 dB over 8 hours or half the exposure time for each additional 5 dB exposure), it can cause some reversible and irreversible effects. These effects include communication interference, patient annoyance, transient hearing loss and, in patients who are susceptible to hearing impairment, permanent hearing loss. All patients are provided earplugs and in addition when applicable, headphones, with a total minimum suppression rating of 30db or greater. No earplugs, no scan.

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