Influence of Body Coil Drive Mode on the MR Safety of Interventional Devices

Motivation: RF-induced heating of interventional devices is reduced at lower magnetic fields, but dangerous heating conditions can still occur during MR-guided interventions. Goal(s): To investigate the effect of body coil drive mode on RF-induced heating of interventional devices at 0.55T and 1.5T. Approach: Numerical simulations, E-field, transfer function and temperature measurements are used to evaluate the dependency of RF-induced heating of commonly used interventional devices on the phase and amplitude settings of body coil ports. Results: RF-induced heating can be reduced using individually adapted body coil drive modes. Impact: Dual-drive body coil technology can be used to generate implant-friendly electromagnetic fields, which can enable safe use of clinical intravascular devices during MR-guided interventions at 0.55T and 1.5T.