Image-Based Validation of Optically Coupled Current Sensor for RF Safety Monitoring

Maryam Etezadi-Amoli¹, Pascal P. Stang¹, Adam Kerr¹, John Pauly¹, Greig C. Scott¹

We validated the accuracy of an optically coupled, photonically powered RF current sensor by comparing both submerged and free space current sensor measurements to current computed from B1 maps within the imaging volume. The sensor and image-based measurements differed by less than 10%. Such quantitative methods of real-time current monitoring could greatly enhance the safety of MRI scans performed in the presence of long conductors, such as interventional guidewires and ablation devices.