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Abstract #0456

Rapid B1+ Mapping using a Sandwiched Train Saturated TurboFLASH Sequence at 7T

James L. Kent1, Ladislav Valkovic2,3, Iulius Dragonu4, and Aaron T. Hess1
1Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom, 2Oxford Centre for Clinical Magnetic Resonance Research, University of Oxford, Oxford, United Kingdom, 3Department of Imaging Methods, Institute of Measurement Science, Slovak Academy of Sciences, Bratislava, Slovakia, 4Siemens Healthineers, Frimley, United Kingdom


Ultra-high field MRI with parallel transmit offers significant advantages but B1 transmit maps must be acquired to utilize its full potential. We designed and evaluated three new adaptations to a pre-saturation TurboFLASH B1+ mapping method. The proposed methods enabled significantly shorter TRs (on the order of 1 s), were insensitive to T1, and had comparable accuracy to the original method whilst maintaining the other desirable characteristics of the sequence. The method was shown to work in 3D allowing for volumetric B+ maps to be acquired in 18 seconds.

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