Abstract #0143

Whole-body 7T 31P birdcage transmit coil driven by a 35kW RF amplifier with an integrated 30-element 31P receive array and an 8-element 1H transmit/receive array

Ladislav Valkovic^1,2, Alex Batzakis³, Jane Ellis¹, Lucian Purvis¹, Albrecht I Schmid^1,4, Matthew D Robson¹, Dennis WJ Klomp^3,5, and Christopher T Rodgers^1,6

¹Oxford Centre for Clinical MR Research (OCMR), RDM Cardiovascular Medicine, University of Oxford, Oxford, United Kingdom, ²Department of Imaging Methods, Institute of Measurement Science, Slovak Academy of Sceinces, Bratislava, Slovakia, ³MR Coils BV, Zaltbommel, Netherlands, ⁴High-Field MR Centre, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, ⁵Department of Radiology, University Medical Center Utrecht, Utrecht, Netherlands, ⁶The Wolfson Brain Imaging Centre, University of Cambridge, Cambridge, United Kingdom

We describe our experiences implementing a whole-body transmit coil driven by a 35kW RF power amplifier, with a 30-element ³¹P receive array, and an 8-element ¹H transmit/receive array, optimised for cardiac ³¹P-MRS at 7T. We describe an adaptation to the vendor’s standard SAR monitoring to monitor RF power levels up to the full 35kW output of the RFPA. This new hardware was found to achieve better ³¹P B₁⁺ and SNR at the depth of the heart than other coils available in our institution. This setup promises to allow the first regionally-resolved, whole-heart ³¹P-MRSI studies at 7T in the near future.

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