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Abstract #0562

Evaluation of Short Folded Dipole Antennas as Receive Elements of Ultra-High Field (UHF) Human Head Array.

Nikolai Avdievich1, Georgiy Solomakha2, Loreen Ruhm1, Klaus Scheffler1,3, and Anke Henning1

1High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Tübingen, Germany, 2Department of Nanophotonics and Metamaterials, ITMO University, St. Petersburg, Russian Federation, 3Department for Biomedical Magnetic Resonance, University of Tübingen, Tübingen, Germany

Increasing the number of surface loops in a human head receive (Rx)-array improves the peripheral SNR, while the central SNR doesn’t substantially change. Recent work demonstrated that optimal central SNR at UHF requires a contribution of two current patterns associated with a combination of loops and dipoles. A novel array consisting of 8 transceiver surface loops and 8 optimized folded Rx-dipoles was developed and tested. Addition of Rx-dipoles doesn’t substantially alter B1+ field and the maximum local SAR. At the same time the new design improves both central and peripheral SNR as compared to the similar 16-element array with Rx-only vertical loops.

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