Ziyue Wu1, Yoon-Chul Kim2, Michael C.K. Khoo1, Krishna S. Nayak2
1Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, United States; 2Deptartment of Electrical Engineering, University of Southern California, Los Angeles, CA, United States
We evaluate an independent linear model for gradient-induced MRI acoustic noise on a clinical scanner and introduce a new method to synchronize the measured acoustic impulse responses of all three gradient axes, thus substantially improve the models acoustic noise prediction accuracy from >32% to <4% when combining sound from all three axes. We also examine differences in the measured transfer functions across different positions within the scanner bore, and discuss implications on the ability to perform general acoustic noise reduction by avoiding system resonance peaks.