Efficient evaluation of MRI-induced electric fields in the vicinity of implantable lead

This paper presents a novel technique for the efficient evaluation of MRI-induced electric fields in the vicinity of implantable metallic leads. The technique is based on the reciprocity theorem in conjuncture with the Huygens principle that allows one to separate the micro-scale modeling of the metallic lead from the macro-level modeling of human subjects within MRI scanners. In addition to the numerical efficiency, this approach clearly explains the lead heating mechanism during MRI operations. Numerical examples are used to demonstrate the efficiency and accuracy of this proposed approach.