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Abstract #1995

Parallel Transmit Vessel Selective Arterial Spin Labelling: Phantom and In-Vivo Results

MAGNA25Aaron Oliver-Taylor1, Chris Randell2, Roger J. Ordidge3, David L. Thomas4

1Department of Medical Physics and Bioengineering, University College London, London, England, United Kingdom; 2PulseTeq Products Division, Renishaw PLC, United Kingdom; 3Centre for Neuroscience, University of Melbourne, Melbourne, Victoria, Australia; 4Institute of Neurology, University College London, London, England, United Kingdom

Vessel selective continuous arterial spin labelling can be achieved using a single surface coil placed over one of the carotid arteries. However the labelling B1 field extends across the neck causing contralateral labelling. Presented is a method using parallel transmission to nullify the B1 field at the contralateral artery. Both phantom and in-vivo results show a reduction in contralateral labelling is possible, improving specificity without losing the advantageous high labelling efficiency and no magnetisation transfer effects of separate-coil CASL.