Abstract #0168

Approaching the Ultimate Intrinsic SNR with Dense Arrays of Electric Dipole Antennas

Gang Chen^1,2,3, Riccardo Lattanzi^1,2, Daniel Sodickson^1,2, and Graham Wiggins^1,2

¹The Center for Advanced Imaging Innovation and Research (CAI2R), Department of Radiology, New York University School of Medicine, New York, NY, United States, ²The Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States, ³The Sackler Institute of Graduate Biomedical Science, New York University School of Medicine, New York, NY, United States

Coil designs motivated by the ideal current patterns corresponding to the Ultimate Intrinsic SNR (UISNR) have been used to boost central SNR at 3T and 7T. For a cylindrical phantom and a current distribution defined on a concentric cylindrical surface, the ideal current pattern for optimal central SNR includes both divergence-free and curl-free components. While loops are exclusively divergence-free, recent work has shown that electric dipole antennae include both divergence-free and curl-free current components. Here we explore in simulation whether arrays with an increasing number of electric dipole antennas can approach UISNR in the center of a head-sized phantom at 7T, and investigate selected practical design considerations.

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