Abstract #4889

A Novel Method for MRI Safe Lead Design

Volkan Acikel ^1,2 and Ergin Atalar ^1,2

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

In this study a novel method for designing MRI safe leads using Modified Transmission Line Method (MoTLiM) is presented. SAR at the tip of a lead is formulated and it is shown that by adjusting the wavenumber along the lead SAR can be decrease significantly. A way to increase wavenumber is multilayer wound leads. In multilayer wound leads, resistance increases due to the proximity effect and inductance increase due to the number of windings. It is shown that by increasing number of layers SAR can be decreased such that the implant lead tip heating is no longer a significant problem.

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