Abstract #4006

Quadrature 31P and single 1H dual-tune coil for cardiac 31P-MRS at 7T

Benoit Schaller¹, Watcharaphol Paritmongkol¹, Arthur W Magill², Matthew D Robson¹, and Christopher T Rodgers¹

¹RDM Cardiovascular Medicine, University of Oxford, OXFORD, United Kingdom, ²Institute of Neuroscience and Medicine - 4, Forschungszentrum Juelich GmbH, Juelich, Germany

Phosphorus spectroscopy is a powerful tool for cardiac metabolism studies. Working at 7T gives a significant (2.8x) gain in SNR compared to 3T. However, with existing RF coils, it is hard to excite the heart uniformly and with sufficient peak B₁+. In this work we simulated 8 candidate coil designs and identified the best one for cardiac ³¹P-MRS. We built this quadrature pair of 15cm loops for ³¹P and a single 10cm loop for ¹H, decoupled with LCC traps, performed safety tests, validated its B₁⁺ in phantoms and recorded spectra in vivo in the human leg, liver and heart.

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