Reduction of Implant RF Heating by Modification of Electric Field Distribution

Yigitcan Eryaman¹, Haydar Celik¹, Burak Akin¹, Ergin Atalar¹

In this work, the optimum EM field that reduces the RF heating of implant leads is calculated. The resulting field also satisfies a given transmit target sensitivity constraint in an axial plane. Among infinite number of solutions satisfying these constraints, the one that minimizes the average SAR is presented. The field distribution which satisfies the electric field and the target transmit sensitivity constraints is realized by using a linearly polarized birdcage coil. Finally, heating experiments of resonant length wires is conducted by using linearly polarized and quadrature coils.