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Abstract #3156

Construction of a 4-channel Transmit/ 4-channel Receive Neck Array for Carotid Artery Vessel Wall Imaging at 7 Tesla

Konstantinos Papoutsis 1,2 , Linqing Li 2 , Stephen J Payne 1 , and Peter Jezzard 2

1 Department of Engineering science, University of Oxford, Oxford, United Kingdom, 2 FMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom

A 4 channel transmit array was designed to meet the required B1 field for a black blood sequence at 7 Tesla. The pulse width, flip angle, available power, optimal RF shim as well as the blood velocity and average arterial anatomy were factored in for the design. A 4 element separate receive array was preferred for improved SNR and was constructed and placed around the neck. The completed coil, 4Tx/4Rx, was thoroughly characterised and its safety was assessed with simulations and temperature measurement experiments. Healthy volunteers were scanned with satisfactory blood suppression and resolution.

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