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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