Dinesh K. Deelchand1, Gregor Adriany1, Can Akgun1, Kamil Ugurbil1, Pierre-Gilles Henry1, Pierre-Francois Van de Moortele1
1Center for Magnetic Resonance
Single-loop and quadrature surface RF coils are often used for NMR spectroscopy since higher signal-to-noise ratio can be achieved in comparison to single channel volume coils. This study shows that single-loop coils are inefficient for human brain spectroscopy studies at 9.4 Tesla because the areas of high values in transmit and receive B1 fields do not overlap in space. On the other hand, quadrature surface coils can still be used as long as the phase between the two coil elements is optimized for a given region-of-interest in order to increase the B1 transmit efficiency.