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Abstract #1706

A Flexible Transceiver Array for Cardiac MRI at 7 T: Performance Evaluation on a Torso Phantom

Sajad Hosseinnezhadian1,2, Roberta Frass-Kriegl2, Sigrun Goluch2, Michael Pichler2, Jürgen Sieg2, Marie Poirier-Quinot1, Luc Darrasse1, Ewald Moser2, Jean-Christophe Ginefri1, and Elmar Laistler2

1IR4M (Imagerie par Résonance Magnétique Médicale et Multi-Modalités), Univ. Paris-Sud, CNRS, Université Paris-Saclay, Orsay, France, 2Division MR Physics - Center for Medical Physics and Biomedical Engineering, Vienna, Austria

A flexible 12-channel transceiver transmission line resonator (TLR) array for 7 T cardiac 1H MRI compatible with parallel transmission systems was developed. The size of the array is 38 cm x 28.5 cm with individual TLRs of 84 mm diameter. A decoupling ring-based inter-element decoupling technique was used where the basic TLR geometry is surrounded by a conducting ring. Its efficiency was demonstrated with the array bent on a torso phantom and a human torso (Sij < -16 dB). Acceleration factors up to 3 in bent configuration can be employed without significant SNR degradation (g-factor < 1.6).

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