Abstract #5430

Active catheter tracking for cardiac MR thermometry during radiofrequency ablation

Solenn Toupin^1,2, Valéry Ozenne¹, Pierre Bour^1,3, 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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