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Abstract #1747

Accurate Localization of Active Devices During Interventional MR Imaging

Julien Barbot1, Tobias Wech2, Steven Shea2, Li Pan2, Klaus Kirchberg1, Kamal Vij3, Christine H. Lorenz2, Sunil Patil2

1Center for Applied Medical Imaging, Siemens Corporate Research, Princeton, NJ, United States; 2Center for Applied Medical Imaging, Siemens Corporate Research, Baltimore, MD, United States; 3SurgiVision, Inc., Irvine, CA, United States

For vascular interventions, precise localization of the catheter is paramount for a successful procedure. For MR, this has been accomplished by tracking microcoils with three, 1D projection images. In past publications, position was determined by finding the maximum value in each projection. In this work, we calculate a simulated projection signal for a given solenoid coil and then correlate this model with incoming projections to improve position detection. The method was tested in a phantom against the maximum detection method and the newly proposed method was significantly more accurate than maximum detection, with results less than 1 mm from ground truth.