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Abstract #1445

Implementation of a self-refocused adiabatic spin echo pulse-pair modulated using the power independent of the number of slices (PINS) technique for simultaneous B1-insensitive multi-slice imaging

Rebecca Emily Feldman 1 , Haisam Islam 2 , and Priti Balchandani 1

1 Translational and Molecular Imaging Institute, Icah School of Medicine at Mount Sinai, New York, New York, United States, 2 Bioengineering, Stanford University, California, United States

High field MR can be challenging due to limited slice coverage, B 1 -inhomogeneity. Adiabatic pulses can limit sensitivity to B 1 -inhomogeneity, however adiabatic pulses deposit quadratic phase that is difficult to refocus and are SAR intensive. Similarly, simultaneous multi-slice imaging can accelerate image acquisition at high fields but RF pulses created as the superposition of multiple slice RF pulses can rapidly exceed safe SAR limits. Using a 'Power Independent of Number of Slices' (PINS) technique, multiple slices can be excited simultaneously at lower power. We implemented a adiabatic PINS refocusing pulse with a matched phased PINS excitation pulse.

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