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Abstract #5558

Motion-corrected high-resolution intra-cardiac imaging using MR-Tracking coils: reducing the effect of noise on motion estimation

Jose de Arcos1, Mikayel Dabaghyan1, William G Stevenson2, Junichi Tokuda1, Raymond Y Kwong2, Ravi T Seethmaraju3, Jeff Schweitzer4, and Ehud J Schmidt1

1Radiology, Brigham and Women's Hospital, Boston, MA, United States, 2Cardiology, Brigham and Women's Hospital, Boston, MA, United States, 3Siemens Healthcare, Boston, MA, United States, 4St. Jude Medical, Minnesota, MN, United States

We developed an intra-cardiac MRI (ICMRI) catheter to monitor heating during MRI-guided electro-physiological ablative procedures. ICMRI includes an imaging coil that expands within the cardiac chambers and a tetrahedral-shaped array of MR-tracking coils, intended to compensate for cardiac motion during the imaging process. In this study, we used real swine cardiac MR-tracking data, which may contain varying levels of positional uncertainty (noise), to develop algorithms that filter this noise, and thus do not distort the motional (translational/rotational) estimates, required for delivering non-blurred high-resolution intra-cardiac images. Our results show that submillimiter-error motion reconstruction is feasible under realistic levels of noise.

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