Cem Murat Deniz1,2, Leeor Alon1,2, Riccardo Lattanzi1,2, Daniel K. Sodickson1, Yudong Zhu1
1Center for Biomedical Imaging, Department of Radiology, NYU School of Medicine, New York, NY, United States; 2Sackler Institute of Graduate Biomedical Sciences, NYU School of Medicine, New York, NY, United States
SAR management and excitation homogeneity are critical aspects of RF pulse design at ultra-high magnetic field strength. We investigated the effects on SAR behavior of incorporating measurable E-field interactions into parallel transmission RF pulse design. We simulated three different transmit coil array configurations using two different coil loadings, a human mesh and a homogeneous water phantom. Small-tip-angle and linear class large-tip-angle pulses were employed. We found that global SAR during parallel excitation decreases when E-field interactions are included in RF pulse design optimization. Larger global SAR benefits were achieved for lower accelerations and for human mesh data.