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Abstract #5546

Advanced Passive Tracking and Visualization of MR-Compatible Diagnostic Electrophysiology Catheter

S├ębastien Roujol1, Radhouene Neji1,2, Henry Chubb1, John Silberbauer1, Tom Lloyd3, Thomas Pohl4, Rainer Schneider4, Nick Kampa3, James Harrison1, Steven Williams1, Rahul Mukherjee1, Louisa O'Neill1, John Whitaker1, Matthew Wright1, Tobias Schaeffter1, Mark O'Neill1, and Reza Razavi1

1Division of Imaging Sciences and Biomedical Engineering, King's College London, London, United Kingdom, 2MR Research Collaborations, Siemens Healthcare Limited, Frimley, United Kingdom, 3Imricor Medical Systems, Burnsville, MN, United States, 4Siemens Healthcare GmbH, Erlangen, Germany

MRI shows promise for the guidance of electrophysiology (EP) procedures. MR-guided EP procedures require reliable catheter tracking capabilities. Passive catheter tracking enable positive or negative contrast visualization of the catheter in the MR-images using for example integrated ferromagnetic/paramagnetic materials or contrast agent. Positive contrast visualization remains challenging and often sensitive to imaging/post-processing parameters. Negative contrast techniques remain associated with confounding factors (i.e. any other signal void) which complicate visual catheter tracking. In this study, we sought to develop and evaluate a novel framework for passive catheter tracking with negative contrast combined with automatic tracking and enhanced visualization of the catheter.

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