Abstract #4417

Circuit Model for Implant Electrode and Lead-Electrode Impedance Matching

Volkan Acikel¹,², Ergin Atalar,²³

¹Electrical and Electronics Engineering, Bilkent University , Ankara, Turkey; ²National Magnetic Resonance Research Center (UMRAM), Ankara, Turkey; ³Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey

In our previous studies we modeled the lead of the implant using Modified Transmission Line Method (MoTLiM) and solve the Radio Frequency (RF) induced currents on the leads. In this study we propose an electrode model that completes our electromagnetic model of active implants under MRI. Also with this model electrode and lead impedances are defined considering their RF scattering and tissue interaction properties. It is shown that although putting series inductor between lead and electrode is a working technique to prevent heating, failure in choosing inductance value can cause increase in the heating.