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Abstract #0201

In-vivo echo-navigated MR thermometry for real-time monitoring of cardiac radiofrequency ablation

Solenn Toupin1,2, Matthieu Lepetit-Coiffe2, Pierre Bour1, Valery Ozenne1, Baudouin Denis de Senneville3, Rainer Schneider4, Kimble Jenkins5, Arnaud Chaumeil1, Pierre Jais1, and Bruno Quesson1

1IHU-LIRYC, Bordeaux, France, 2Siemens Healthcare, Saint Denis, France, 3Mathematical Institute of Bordeaux, Bordeaux, France, 4Siemens Healthcare, Erlangen, Germany, 5MRI Interventions, Irvine, CA, United States

The visualization of lesion formation in real time is one potential benefit of carrying out radiofrequency ablation (RFA) under magnetic resonance (MR) guidance in the treatment of ventricular arrhythmia. In this study, we propose a real-time MR thermometry method to visualize online the temperature distribution in the myocardium during catheter-based RFA. An echo-navigated sequence is used with slice tracking to compensate respiratory-induced through-plane motion and allow all image orientation. The method was evaluated during free breathing in 5 healthy volunteers and during RF delivery on the left ventricle (LV) of a sheep in vivo.

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