We evaluated the performance of two RF coil configurations for ultra-high field (7T) 31P-MRS applications in the body. We tested: (A) a dipole Tx/Rx + loop Rx coil vs (B) a quadrature dual-loop Tx/Rx coil. We assessed their relative performance by EM modelling simulations and through phantom and in vivo cardiac scans. Both simulations and experimental verifications indicate that there is notable improvement in terms of B1+ efficiency for the dipole+loop combination compared to quadrature loops. We extrapolate these preliminary findings to predict the performance of the dipole+loop combination if driven at 35kW total like our previous whole-body birdcage coil.
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