A Comparison of B 1 Mapping Methods for T 1 Mapping at 3T
Mathieu Boudreau 1 , Christine Tardif 2 , Nikola Stikov 1 , and G. Bruce Pike 1,3
Montreal Neurological Institute, McGill
University, Montreal, Quebec, Canada,
of Neurophysics, Max Planck Institute for Human
Cognitive and Brain Sciences, Leipzig, Saxony, Germany,
Brain Institute, Faculty of Medicine, University of
Calgary, Calgary, Alberta, Canada
are an essential part of most quantitative MRI
protocols, including Variable Flip Angle (VFA) T
To achieve whole brain quantitative imaging in
reasonable scan times, several novel rapid B
have been introduced. This work compared VFA T
in white matter produced with four B1 methods: Double
angle, Bloch-Siegert, AFI, and double angle EPI. Six
healthy adult subjects were scanned with a 3T Siemens
Tim Trio MRI using a 32-channel receive-only head coil.
resulted in comparable WM T
and all rapid methods strongly correlated with the
reference DA map.
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