Analytical Approach for MRI RF Array Coils Decoupling by Using Counter-Coupled Passive Resonators

We introduce an analytical approach to design decoupling filters for MRI radiofrequency array elements, adopting counter-coupled passive resonators as unit-cells. Specifically, our method is based on a magneto-static hypothesis, thus deep comprehension of the physical interactions between all elements in system and guidelines can be achieved. In particular, couplings adjacent next-nearest neighbors coils pairs are both modeled, hence addressing requirements arrays. The analytically-obtained filter solution subsequently refined resorting targeted full-wave simulations, reducing computational effort. To prove validity proposed approach, we conceived test-case consisting three planar RF coils, tuned at 7T proton Larmor frequency. demonstrated through simulations that accurate effective. Moreover, fabricated prototype performed benchtop measurements, unloaded conditions presence biological phantom, resulting excellent agreement with simulations. developed framework useful model control mutual various system. addition, possibility print same dielectric substrate leads mechanically robust prototype.