Patent ID: 8676295

Claim:
A tracking device configured to be coupled to an interventional medical device to track a position of the interventional medical device during an interventional medical procedure using a magnetic resonance imaging (MRI) system, the tracking device comprising: a first tracking member having a first magnetic susceptibility and configured to be coupled to an interventional medical device; a second tracking member having a second magnetic susceptibility different than the first magnetic susceptibility and configured to be coupled to the interventional medical device; wherein the first tracking member and the second tracking member are configured to adjust relative to each other to adjust the tracking device between a first arrangement and a second arrangement; and wherein the first magnetic susceptibility and the second magnetic susceptibility are selected such that when the tracking device is positioned within a magnetic field of an MRI system: when the tracking device is arranged in the first arrangement the tracking device produces a local magnetic field that is measurable by the MRI system; and when the tracking device is arranged in the second arrangement the tracking device produces a local magnetic field that is reduced with respect to the local magnetic field produced by the tracking device in the first arrangement.