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Abstract #0102

Kt Points: Fast Three-Dimensional Tailored RF Pulses for Flip-Angle Homogenization Over an Extended Volume

Martijn Anton Cloos1, Nicolas Boulant1, Michel Luong2, Guillaume Ferrand2, Christopher J. Wiggins1, Eric Giacomini1, Alain France2, Dennis Le Bihan1, Alexis Amadon1

1CEA, DSV, I2BM, NeuroSpin, LRMN, Gif-sur-Yvette, France; 2CEA, DSM, IRFU, SACM, Gif-sur-Yvette, France

Transmit-SENSE gives the opportunity to implement short excitation pulses with good flip-angle homogeneity at high field. For slice-selective pulses, this was previously demonstrated using a spoke k-space trajectory. Here we present a novel pulse design returning sub-millisecond pulses with excellent flip-angle homogenization over an extended volume. Experimental results are shown at 7T, demonstrating a 950-μs excitation pulse producing a 151.1 flip-angle distribution over a 16-cm spherical phantom having the same electrical properties as a human head.