Brent Rudd1, Mingfeng Lee1, Teik C. Lim1, Jing-Huei Lee2,3
1Mechanical Engineering, University of Cincinnati, Cincinnati, OH, USA; 2Biomedical Engineering, University of Cincinnati, Cincinnati, OH, USA; 3Center for Imaging Research, University of Cincinnati, Cincinnati, OH, USA
In this study, we outfitted a dummy with a pair of headphones containing piezoceramic speakers with optical microphones installed inside the earpieces, near the patient ear locations. The dummy was placed in the MRI scanner and the sound pressure level was measured during EPI scanning, both with and without the active noise control (ANC) system operating. Results presented show the ANC system operating in-situ attained significant SPL reduction at the first dominant frequency. To the best of our knowledge, this is the first demonstration that ANC can effectively reduce acoustic noise generated by an MRI scanner during a live scan.
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