Meeting Banner
Abstract #4401

Construction of a 4-Channel Transmit Neck Array for PCASL Tagging at 7 Tesla and Comparison with a Head Coil.

Konstantinos Papoutsis1, James A. Meakin1, Aaron T. Hess2, Jamie Near3, Stephen J. Payne4, David Edwards4, Peter Jezzard1

1FMRIB Centre, University of Oxford, Oxford, Oxfordshire, United Kingdom; 2Department of Cardiovascular Medicine , University of Oxford, Oxford, Oxfordshire, United Kingdom; 3McGill Univeristy, Montreal, Quebec, Canada; 4Department of Engineering Science, University of Oxford, Oxford, Oxfordshire, United Kingdom

In this study, a 4-channel neck array has been constructed and used at 7 Tesla as a tagging coil for the pCASL sequence. A comparison of the tagging efficiency and SAR was made between tagging with a 1Tx/32Rx head coil vs tagging with the neck array. Electromagnetic characterization of the neck coil helped to address local SAR risk by estimating the worst case transmission pattern.

Abstract PDF Presentation Video

Keywords

accessible according accounting achieved acquisition affected albeit amplitude amplitudes anterior approximately around arrangement array arterial assessed audience available benefits body built cardiovascular carotid channel channels coil coils combination combine combined combiner commercial compensated complex condition conjunction construction control custom cylindrical defined delay designed divert double duty effective efficiency electrical electromagnetic encode excessive excitation field fields flash flexible flow flowing generated global gradient head heating highest human improved inhomogeneity just kingdom known label load local long made mass matched matrix measured medical medicine middle near necessary neck nova optimized output overcome oxford parallel particular parts peter phantom phantoms phys placed post power preceded preferable pseudo pulse respectively restrictions safety scanner scanning scenario science section separation setup shimmed shimming side simulations slice smith software solution special spherical spin subject subtraction supervised switching table tagging taking target thesis together transmission transmit transmitted tube tubes tuned tuning unwrapping variable variation velocity versus whereas worst zero