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Abstract #1658

Active Catheter Tracking Error Characterization for Minimally Invasive MR-Guided Cardiac Interventions

Arjun Gupta1, Labonny Biswas2, Jay Soni2, Brandon Coles1, Sebastian Ferguson2, Graham A. Wright3, and Nilesh R. Ghugre3
1Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada, 2Physical Science Platform, Sunnybrook Research Institute, Toronto, ON, Canada, 3Schulich Heart Program, Sunnybrook Research Institute, Toronto, ON, Canada


Minimally invasive cardiac interventions, such as ablation treatment for ventricular tachycardia and therapy delivery involving biologics (cells, genes, biomaterials) for the treatment of myocardial infarction, require a tracking accuracy of <5mm. Our study aimed to characterize the spatial error associated with MR-guided active catheter tracking under static conditions. In a 1.5T MR scanner, we tracked an ablation catheter at 48 different positions, all confined within the boundaries of where a typical human heart would be located. We found that the error was both minimized and maintained below our 5mm target when using a Hadamard multiplexed active tracking sequence.

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