System and method for device tracking via magnetic resonance imaging with light-modulated magnetic susceptibility markers

摘要

Described here are systems and methods for using a laser-induced demagnetization of magnetic particles disbursed in a tracking marker to generate variable susceptibility effects that can be imaged with magnetic resonance imaging (“MRI”). As one example, laser power is delivered to nickel particles using fiber optics. This demagnetization effect can be used in rapid tracking of interventional devices by subtracting the two images acquired when the laser is off and on.