Abstract #0201

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

Solenn Toupin^1,2, 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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