Abstract #4333
Slab-wise parallel transmit multiband RF pulse design for simultaneous multislice imaging with volumetric coverage
Xiaoping Wu 1 , Sebastian Schmitter 1 , Kamil Ugurbil 1 , and Pierre-Francois Van de Moortele 1
1
CMRR, Radiology, University of Minnesota,
Minneapolis, Minnesota, United States
Simultaneous MultiSlice (SMS) MR imaging using MultiBand
(MB) RF pulses is playing an increasingly important role
in neuroimaging. Recently, we have proposed a slice-wise
parallel transmit (pTx) MB pulse design that can be used
to improve transmit B1 homogeneity and/or reduce RF
power consumption relative to a single channel Circular
Polarized mode application. However, directly utilizing
this slice-wise approach and designing pTx MB pulses in
a slice-by-slice fashion for all necessary imaging
slices for covering a large volume of interest, such as
the whole brain, is impractical within clinical time
constraints with current instrumentation, especially
when using high through-plane spatial resolutions. In
the present study, we propose a novel, effective and
practical slab-wise pTx MB pulse design targeting
volumetric coverage in SMS/MB imaging and describe some
of its important properties by designing RF pulses based
on electromagnetic modeling of a head array at 7T.
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