A Technique to Evaluate MRI-Induced Electric Fields at the Ends of Practical Implanted Lead

Shi Feng, Rui Qiang, Wolfgang Kainz, Ji Chen
2015 IEEE transactions on microwave theory and techniques  
This paper presents a novel technique for efficient evaluation of MRI-induced electric fields or induced voltages in the vicinity of implanted metallic leads. The technique is based on the reciprocity theorem in conjunction with the Huygens Principle. This approach allows one to decouple the microscale metallic lead simulation/measurement from the macrolevel phantom human simulations within the MRI scanners. Consequently, the estimation of MRI-induced heating on an implanted lead, and the
more » ... d voltage on the pacemaker device can be greatly simplified. In addition, this method clearly explains the induced lead heating mechanism during MRI procedures. Several numerical examples as well as measurement results are given to demonstrate the efficiency and accuracy of this method.
doi:10.1109/tmtt.2014.2376523 fatcat:2fi6k2rxgjgvpnpujoa6jirnsa