Biot–Savart-Based Design and Workbench Validation at 100 MHz of Transverse Field Surface RF Coils

Radiofrequency (RF) surface coils are extensively used as receivers in magnetic resonance imaging (MRI) and spectroscopy (MRS) systems thanks to their high signal-to-noise ratio (SNR). For specific applications, the design of dedicated RF with a transverse (to coil’s plane) field pattern can be necessary. Such transverse-field constituted by several central linear (parallel or crossing) conductor elements connected return current paths. Typically, outer shape such is circular squared, although other geometries used. This paper describes implementation validation coil simulator based on magnetostatic analysis, which permits optimization square butterfly figure-of-eight adjustable size mutual distance between elements. The simulation results, compared ones provided standard loop coil, were validated 100 MHz workbench measurements performed three home-built prototypes. Finally, two novel quadrature structures designed overlapping orthogonal simulated theoretically characterized. described here should suitable for wide range MRI/MRS preclinical/clinical mainly at fields below 3 T.