Abstract #3319

An 8-Channel Shielded Transceiver Coil for Carotid Artery imaging at 7T

Pedram Yazdanbakhsh¹, Marcus Couch², Kyle M. Gilbert³, Johnny Derhovagimian¹, and Richard Hoge¹

¹McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC, Canada, ²Siemens Healthcare Limited, Montreal, QC, Canada, ³Centre for Functional and Metabolic Mapping, Western University, London, ON, Canada

Synopsis

An 8-channel shielded transmit/receive RF array has been designed and fabricated for imaging the carotid arteries at 7T. The array, similar to that presented in Ref. [1], consists of four overlapping surface loops per side. In addition to the Ref. [1], we have also added two RF shields per side with DC blocking capacitors to mitigate eddy currents. To ensure robust safety of the 7T pTx coil, local SAR matrices, and the commensurate virtual observation points (VOPs), were calculated for online SAR supervision [2,3]. Finally, the phase and amplitude of each channel have been optimized to achieve maximum B1+ homogeneity.

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