Abstract #4437
Reduced field-of-view diffusion with 2D echo-planar RF excitation and Multiband refocusing for extended slice coverage and robust fat suppression
Suchandrima Banerjee 1 , Emine Ulku Saritas 2,3 , Rachel Connett 1 , and Ajit Shankaranarayanan 1
1
Global Applied Science Laboratory, GE
Healthcare, Menlo Park, California, United States,
2
Department
of Electrical and Electronics Engineering, Bilkent
University, Bilknet, Ankara, Turkey,
3
National
Magnetic Resonance Research Center, Bilknet University,
Bilknet, Ankara, Turkey
Reduced field-of-view (rFOV) single-shot echo-planar
imaging (ssEPI) with 2D Echo-planar (EP) RF excitation
can improve diffusion image quality and enable high
resolution, by reducing distortion. However slice
coverage can be limited because of periodic repetitions
of the excitation sidelobes appearing along the slice
direction. We propose to address this constraint by
using a multiband refocusing scheme that will
simultaneously refocus multiple excitation lobes. Signal
from the simultaneously refocused slice locations can be
separated using parallel imaging method. We demonstrate
that by using multiband refocusing with 2D EPRF in ssEPI,
slice coverage can be increased while preserving rFOV
and fat suppression.
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