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Abstract #0706

Design and Optimization of Transmit Arrays for MRI at 11.7T

Son Chu1, Vincent Gras2, Paul McElhinney1, Nicolas Boulant2, and Shajan Gunamony1
1Imaging Centre of Excellence, University of Glasgow, Glasgow, United Kingdom, 2University of Paris-Saclay, CEA, CNRS, BAOBAB, NeuroSpin, Gif sur Yvette, France


The promise of supra-linear boost in signal-to-noise-ratio is driving the development of MRI at extremely high static field strengths, such as 10.5T and beyond. The shorter wavelengths in tissues at high Larmor frequency causes destructive interference of the electromagnetic field, resulting in image inhomogeneity and increased local specific absorption rate (SAR). An efficient transmit array is vital in this regime to optimally use the available RF power, achieve efficient excitation and operate within SAR constraints. This work presents the design and optimization of an 8-channel transmit array for MRI at 11.7T and its performance evaluation using RF pulse design simulations.

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