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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 Henning1,3, 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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