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Abstract #0926

3D Bloch-Siegert EPI B1+-mapping

Andreas Lesch1, Christoph Stefan Aigner1, Stefan Manfred Spann1, Matthias Schloegl1, and Rudolf Stollberger1,2

1Institute of Medical Engineering, Graz University of Technology, Graz, Austria, 2BioTechMed Graz, Graz, Austria

In this work we investigate the feasibility of a double shot acquisition for 3D Bloch-Siegert B1+ mapping. Therefore, we combine the previously proposed variational reconstruction algorithm for highly subsampled Bloch-Siegert data with an EPI readout. The acquired dataset was retrospectively under-sampled and the reconstruction results are compared to the fully sampled reference, a zero padded low resolution estimate and to results acquired with a much more robust GRE readout. We can show that the results are in good accordance to the fully sampled reference and the GRE acquisition for acceleration factors of up to 100 making double shot acquisition possible.

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