Abstract #2506

9.4 T Double-Tuned 13C/1H Human Head Array Using a Combination of Surface Loops and Dipole Antennas.

Nikolai Avdievich¹, Georgiy Solomakha², Loreen Ruhm¹, Anke Henning^1,3, and Klaus Scheffler¹

¹High-field Magnetic Resonance, Max Planck Institute for Bilogical Cybernetics, Tübingen, Germany, ²Physics and Engineering, ITMO University, St. Petersburg, Russian Federation, ³Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, TX, United States

Dipole antennas have been successfully utilized at ultra-high fields (UHF, >7 T) for human body and head imaging. Combining X-nuclei surface loops and ¹H dipoles can substantially simplify the design of a double-tuned UHF human head coil. In this work, we developed and constructed a novel ¹³C/¹H human head 9.4 T array coil consisting of eight ¹³C surface loops and eight ¹H folded-end dipoles surrounding the head. We showed that coupling between loops and dipoles can be minimized by placing four ¹H traps into each ¹³C loop. The new coil demonstrated an improved ¹H longitudinal coverage and reasonable Tx efficiency.

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