Modeling of RF Induced Implant Lead Current for MRI

Volkan Acikel¹, Ergin Atalar¹

Induced current, due to RF field, on implant leads may cause serious heating problems. In this study, theoretical analysis of this problem is made by modeling lead in a similar manner with transmission-line lumped element circuit model. Induced currents are solved for different cases using this model and solutions are compared with method-of-moments solutions. It is found that this model is as accurate as MoM. Moreover, it gives more understanding on behavior of induced current and as heating problem is directly related to induced current. It enables us to develop new solutions and understand the current solutions for heating problem.