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Abstract #0707

A Compact 16Tx-32Rx Geometrically Decoupled Phased Array for 11.7T MRI

Michel Luong1, Guillaume Ferrand1, Edouard Chazel2, Paul-François Gapais2,3, Vincent Gras2, Nicolas Boulant2, and Alexis Amadon2
1CEA, IRFU, Université Paris-Saclay, Gif sur Yvette, France, 2Université Paris-Saclay, CEA, CNRS, BAOBAB, NeuroSpin, Gif sur Yvette, France, 3Multiwave Imaging SAS, Marseille, France


A geometrically decoupled 16Tx-32Rx RF coil has been designed for the Iseult 11.7T project. It has 16 transceive resonators and 16 receive-only loops. This peculiar architecture satisfied three major concerns: compactness-made compatibility with a local B0 shim insert, easy tuning and performance prediction. Simulations show high flip angle homogeneity in the whole brain (NRMSE<6%) with kT-points, accounting for all constraints (pulse length, SAR, power budget). Predicted global SNR in phantom with SoS reconstruction is 2.47±0.2 times higher as compared to 7T (with the commercial 8Tx-32Rx Nova coil) or equivalently, the SNR scales as B0 to the power of 1.74±0.16.

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