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Abstract #1503

1H-23Na Dual-Tuned Radio-Frequency volume coil design for MRI at 7 T

Francesca Maggiorelli1,2,3, Alessandra Retico2, Eddy Boskamp4, Fraser Robb5, Angelo Galante6, Marco Fantasia6, Marcello Alecci6, Gianluigi Tiberi3, and Michela Tosetti3

1Physical Sciences, Earth and Environment, University of Siena, Siena, Italy, 2Pisa Division, INFN, Pisa, Italy, 3IRCCS Stella Maris, Imago7 Foundation, Pisa, Italy, 4Hyperfine Research inc, Guilford, CT, United States, 5GE Healthcare, Aurora, OH, United States, 6Life, Health & Environmental Sciences, University of L’Aquila, L'Aquila, Italy

We present a systematic comparison between two dual-tuned (DT) RF coil models through electromagnetic simulations. The first model (imbricated) consists of two concentrically placed birdcages, whereas the second model (four-rings) consists of two High-Pass birdcage-like structures nested over an internal Low-Pass birdcage. For both DT-RF coil models, the dimensional parameters have been varied in order to optimize the B1+ field homogeneity and the coil efficiency at the proton (298.03MHz) and sodium (78.86MHz) Larmor frequency at 7T. Results show that the longest four-rings DT-RF coil model has the best performances.

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