Lethimonnier, F.

noise imaging interventional sequence exposure measurement hearing sound frequency interventional mr imaging noise exposure gradient level magnet repetition time field interventional radiologist a-weighted scale radiology scale mr imaging a-weighted gre echo train repetition system radiologist hearing protection procedure result interventional mr procedure hearing loss interventional mr procedures reson train reduction microphone protection pressure safety echo time effect table resonance 5- g line pulse 5- gauss line pulse sequences section person analysis speech influence section thickness number 90 db author imager decrease health equivalent-continuou plane earplug noise measurements health administration isocenter angle strength 99.3 db sound pressure levels figure mr imaging suite mr imaging sequences value 2 khz mr imager 1.5- noise-induced hearing loss ambient noise operator 1.5 t