Abstract #3207
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
1
Montreal Neurological Institute, McGill
University, Montreal, Quebec, Canada,
2
Department
of Neurophysics, Max Planck Institute for Human
Cognitive and Brain Sciences, Leipzig, Saxony, Germany,
3
Hotchkiss
Brain Institute, Faculty of Medicine, University of
Calgary, Calgary, Alberta, Canada
B
1
maps
are an essential part of most quantitative MRI
protocols, including Variable Flip Angle (VFA) T
1
mapping.
To achieve whole brain quantitative imaging in
reasonable scan times, several novel rapid B
1
methods
have been introduced. This work compared VFA T
1
maps
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.
All B
1
methods
resulted in comparable WM T
1
maps,
and all rapid methods strongly correlated with the
reference DA map.
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