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Abstract #1753

Measurement Accuracy of Different Active Tracking Sequences for Interventional MRI

Tobias Wech1,2, Steven M. Shea1, Li Pan1, Julien Barbot1, Kamal Vij3, Christine H. Lorenz1, Sunil Patil1

1Center for Applied Medical Imaging, Siemens Corporate Research, Baltimore, MD, United States; 2Institute of Radiology, University of Wuerzburg, Wuerzburg, Bavaria, Germany; 3SurgiVision Inc, Irvine, CA, United States

For interventional MRI, precise localization of the catheter is crucial. In this work, a study was performed to compare the accuracy of three different tracking sequences (Single-Echo, Dual-Echo, Hadamard Multiplexed). A dedicated phantom was constructed out of LEGO Duplo bricks (Bilund, Denmark) that offered several defined positions for the experiments. Hadamard Multiplexed showed the most stable and accurate results, especially in the presence of off-resonance conditions, although Single Echo may also offer sufficient accuracy for time-critical applications.