Investigation of correlation between surface current and coupling using conventional coils and shielded coaxial cable coils operating at 7T

One of the major challenges in the design of multichannel arrays for UHF MRI is minimizing coupling between elements. Shielded-coaxial-cable (SCC)
coils have been recently proposed as highly decoupled elements per se: however, the decoupling mechanism of SCC coils is still not determined. In this work, we
examined the relationship between coupling, surface current density uniformity, and the total current on coil conductor through measuring and simulating three
different 2-coils arrays. While no correlation was observed between surface current density uniformity and interelement coupling, a negative correlation was
observed between the coupling and the total current on coil conductor.