SAR-reduced Asymmetric tr-FOCI for PICORE-ASL
Didi Chi1,2, Yasmin Blunck1,2, Rebecca Glarin2, Catherine E. Davey1,2, Josef Pfeuffer3, Daniel Staeb3, Jin Jin3, and Leigh A. Johnston1,2
1Department of Biomedical Engineering, University of Melbourne, Parkville, Australia, 2Melbourne Brain Centre Imaging Unit, University of Melbourne, Parkville, Australia, 3MR Research Collaborations, Siemens Healthcare Pty Ltd, Melbourne, Australia
PICORE-ASL using tr-FOCI pulses during labelling typically generates high power deposition at 7T. The current study introduces an asymmetric tr-FOCI pulse for PICORE-ASL to achieve SAR reduction. Results from simulations, phantom and in vivo experiments demonstrate the SAR reduction that can be achieved by using the asymmetric pulses without sacrificing inversion efficiency, slice profiles or CBF measurement.
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