Frequency scaling of catheter-based magneto-inductive MR imaging detectors

Frequency scaling rules are introduced for catheter-based magneto-inductive magnetic resonance imaging detectors, intended for in vivo imaging of the vascular and biliary ductal systems. The design is based on a cascade of magnetically coupled L-C resonators, fabricated as a thin-film circuit and mounted on a catheter. Intrinsic safety is introduced using resonant elements designed to avoid coupling to uniform RF magnetic and electric fields. Mapping of reception patterns and high-resolution ¹H imaging are demonstrated in a 3 T clinical scanner.