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Abstract #3511

In-Plane Signal Leakage (L-factor) Maps from TGRAPPA

R. Allen Waggoner1, Kenichi Ueno2, Hideto Kuribayashi3, and Keiji Tanaka1,2

1Laboratory for Cognitive Brain Mapping, RIKEN-Brain Science Institute, Wako-shi, Japan, 2Support Unit for Functional Magnetic Resonance Imaging, RIKEN-Brain Science Institute, Wako-shi, Japan, 3Siemens Healthcare KK, Tokyo, Japan

Residual aliasing is a well-documented problem for multiband reconstructions, but it can be an important issue with in-plane acceleration methods as well. With GRAPPA in particular, the residually aliased signal can be distributed fairy randomly, making it appear as g-factor noise. We demonstrate that the use of TGAPPA permits not only the elimination of the residually aliased signal but also the determination of L-factor maps, which can be a potentially useful tool in understanding how to minimize residual aliasing.

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