Abstract #0362
Extended Parallel Imaging in Alternating-SSFP fMRI
Tiffany Jou 1 , Joseph Y Cheng 2 , Chris Bowen 3 , Michael Lustig 4 , and John M Pauly 1
1
Electrical Engineering, Stanford University,
Stanford, CA, United States,
2
Radiology,
Stanford University, Stanford, CA, United States,
3
Radiology,
Dalhousie University, Halifax, NS, Canada,
4
Electrical
Engineering and Computer Sciences, UC Berkeley,
Berkeley, CA, United States
By using RF catalyzation to alternate between two RF
phase-cycling steady states, Alternating-SSFP (alt-SSFP)
suppresses banding artifacts in conventional Passband
Balanced-SSFP (pb-SSFP) and allows for whole-brain fMRI
in a single functional run. In this work, we demonstrate
that due to the offset banding patterns of different
phase-cycling, the coil sensitivity maps of alternate
phase-cycling volumes can be used as additional maps to
enhance the conditioning of the parallel imaging
reconstruction of the alt-SSFP phase-cycled images. This
increases temporal SNR for alt-SSFP fMRI in highly
accelerated cases.
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