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Abstract #5430

Active catheter tracking for cardiac MR thermometry during radiofrequency ablation

Solenn Toupin1,2, Valéry Ozenne1, Pierre Bour1,3, Rainer Schneider4, Matthieu Lepetit-Coiffé2, Baudouin Denis de Senneville5, Erik Dumont3, Pierre Jaïs6, and Bruno Quesson1

1Imaging, IHU Liryc (Electrophysiology and heart modeling institute), Bordeaux, France, 2Siemens Healthineers France, Saint-Denis, France, 3IGT (Image Guided Therapy), Pessac, France, 4Siemens Healthineers, Germany, 5IMB (Mathematics Institute of Bordeaux), Bordeaux, France, 6Electrophysiology and Ablation Unit, IHU Liryc (Electrophysiology and heart modeling institute), Bordeaux, France

Cardiac MR thermometry provides a real-time monitoring of temperature distribution in myocardium during catheter-based radiofrequency ablation. One major challenge of this technique is the compensation of motion induced by the heart contraction and respiration. In this study, we propose to perform fast multi-slice proton resonance frequency (PRF) shift MR thermometry combined with a real-time slice following technique, based on active catheter tracking. Performance of this approach was evaluated in vitro on a moving agar gel phantom.

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