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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