A Reflection Mode Fiber-optic Faraday Sensor for Device Localization in Interventional MRI
Umathum R, Brenner S, Bock M, Semmler W, Aguor E
German Cancer Research Center
A position-sensor based on the Faraday Effect could be a safe alternative to active tracking coils that use electrically conducting structures in MR-guided interventions with the risk of device heating. The fiber-coupled sensor attenuates traversing light as a function of both the strength of a surrounding magnetic field and the sensor-orientation towards the field-direction. To integrate a Faraday sensor into an interventional device the use of only one fiber for both sensor illumination and signal readout would be advantageous. In this work we present a single fiber sensor-design and prove its operability in the MR environment.