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Abstract #0206

Eliminating Banding Artifacts in bSSFP using Parallel Transmission

Chia-Yin Wu1,2,3, Jin Jin2,4, Markus Barth1,2,3, and Martijn Cloos1,2
1Centre for Advanced Imaging, University of Queensland, St Lucia, Australia, 2ARC Training Centre for Innovation in Biomedical Imaging Technology, University of Queensland, St Lucia, Australia, 3School of Information Technology and Electrical Engineering, University of Queensland, St Lucia, Australia, 4Siemens Healthcare Pty Ltd, Brisbane, Australia

Synopsis

Keywords: Parallel Transmit & Multiband, RF Pulse Design & FieldsIn this work, we demonstrate a parallel transmit implementation of the bSSFP sequence at 7 Tesla. The bSSFP sequence is one of the most efficient acquisition strategies however highly sensitive to B0 inhomogeneity which creates undesirable banding artefacts. A tailored pair of pTx pulses can be used to induce the desired steady-state magnetisation behaviour at all spatial locations regardless of the off-resonance frequency due to B0 inhomogeneity. Shown through simulation and experimental validation, we were able to capture signal in one acquisition with significant mitigation of banding artifacts and improvement in signal uniformity without SNR loss and time penalty.

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