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Abstract #0913

Root-Flipped Multiband Radiofrequency Pulses

Anuj Sharma 1 , Michael Lustig 2 , and William A. Grissom 1

1 Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, United States, 2 EECS, University of California, Berkeley, California, United States

In simultaneous multislice imaging, the peak power of the multiband pulse increases as square of the number of slices. This is a major concern for spin echo refocusing pulses. We present a method to design low peak-power refocusing and phase-matched excitation pulses for use in spin echo simultaneous multislice imaging. The pulses are designed based on the Shinnar Le-Roux algorithm and the peak power is reduced by finding an optimal root configuration of the pulse filter. Simulations and experiments demonstrate that the proposed pulses are of shorter duration compared to phase-optimized and time-shifted pulses for the same peak RF power.

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