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Abstract #4623

BEEEP: B1-robust Energy Efficient Excitation Pulses

Eric Van Reeth1, Hélène Ratiney1, Olivier Beuf1, Soukaina Kanice1, Steffen J Glaser2, and Dominique Sugny3

1CREATIS, Villerubanne, France, 2Department of Chemistry, Technical University of Munich, Garching, Germany, 3Laboratoire Interdisciplinaire Carnot de Bourgogne, Dijon, France

This study introduces a new family of broadband B1-robust excitation (90°) pulses for MRI with large enough bandwidth (+/- 1 kHz) to account for static field inhomogeneities, and minimal energy deposition. RF pulses are designed with a regularized optimal control algorithm, which is able to adapt the pulse B1-robustness range to fit the coil limits in terms of peak amplitude and energy. In vitro acquisitions using an endoluminal-shaped RF transmit coil show comparable excitation profiles than BIR4 pulses, although BEEEP pulses deposit 5.2 times less energy.

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