Abstract #1503
Multiband spin- and gradient-echo (SAGE) fMRI
Heiko Schmiedeskamp 1 , Eric Peterson 1 , Julian Maclaren 1 , Rafael O'Halloran 1 , Thomas Christen 1 , Samantha J Holdsworth 1 , Eric Aboussouan 1 , William A Grissom 2 , and Roland Bammer 1
1
Department of Radiology, Stanford
University, Stanford, CA, United States,
2
Biomedical
Engineering, Vanderbilt University, Nashville, TN,
United States
The combined acquisition of gradient-echo and spin-echo
fMRI signals facilitates the differentiation between
simultaneously acquired BOLD signal changes with
distinct contrast mechanisms at the expense of increased
repetition time or decreased slice coverage. To
facilitate combined gradient-echo and spin-echo fMRI
while maintaining whole-brain coverage without
prolonging TR, we propose utilizing multiband RF
excitation in simultaneous multi-echo spin- and
gradient-echo (SAGE) EPI acquisitions for fMRI, and we
present preliminary results using a breath-hold task as
proof-of-principle for stimulus-based multiband SAGE
fMRI experiments.
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