Daniel K Sodickson1,2, Graham C Wiggins1,2, Gang Chen1,2, Karthik Lakshmanan1, and Riccardo Lattanzi1,2
1Center for Advanced Imaging Innovation and Research (CAI2R) and Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States, 2Sackler Institute of Graduate Biomedical Sciences, New York University School of Medicine, New York, NY, United States
We present a fundamental electrodynamic explanation for the SNR
performance of electric dipole antennae at high field. We demonstrate that typical electric dipole
coils combine divergence-free and curl-free surface current components,
allowing them to exceed the performance limits for either component alone. We also show that z-directed electric dipoles
have a strong overlap with ideal current patterns associated with the ultimate
intrinsic SNR at high field strength.