Patent ID: 8688226
Filing Date: 2014-04-01
Classification: A61N

Abstract:
1. An MRI safe lead, comprising: an elongate flexible body, the body having distal and proximal portions; a plurality of conductors extending along the flexible body, each conductor comprising a plurality of axially spaced-apart coiled segments and a plurality of linear segments residing between adjacent coiled segments; at least one electrode disposed along the distal portion of the body and coupled to the plurality of conductors; a dielectric disposed over the conductors; a conductive shield disposed over the dielectric with the dielectric residing between the conductors and the conductive shield; and a plurality of first capacitors, each first capacitor electrically connecting a respective one of the conductors to the shield to define a RF short and low frequency open circuit, wherein the coiled segments of the conductors, the dielectric, the conductive shield, and the plurality of capacitors define a plurality of high impedance segments that are tuned to a target RF frequency associated with an MR