Electromagnetic Field Analysis of an Imaging Coil Attached to a MRI-Guided Needle-Based Intervention Robot

Transmission of radio frequency pulses in MRI can result in heating on patient facing surfaces which encase conducting structures such as receive coils. Identifying locations of heating caused by electromagnetic fields is important for operating within safe limits to perform patient studies. To find those hot spots on a patient facing receive coil, simulation was used to visualize electromagnetic fields. Hot spot locations for an unloaded coil were identified to support an investigational device exemption submission aimed at enabling patient studies for robotically assisted MRI-guided needle-based interventions such as pain-relieving therapeutic or contrast agent injections, as well as biopsy and ablation procedures.