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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