Abstract #0120

Active tracking based cardiac triggering of MR thermometry in an animal model

Ronald Mooiweer¹, Rainer Schneider², Radhouene Neji^1,3, Rahul K Mukherjee¹, Steven Williams¹, Li Huang¹, Valéry Ozenne⁴, Pierre Bour⁴, Jason Stroup⁵, Tom Lloyd⁵, Pierre Jaïs⁴, Bruno Quesson⁴, Mark O'Neill¹, Tobias Schaeffter^1,6, Reza Razavi¹, and Sébastien Roujol¹

¹Biomedical Engineering, King's College London, London, United Kingdom, ²Siemens Healthcare GmbH, Erlangen, Germany, ³MR Research Collaborations, Siemens Healthcare Limited, Frimley, United Kingdom, ⁴IHU-Liryc, Pessac, France, ⁵Imricor Medical Systems, Burnsville, MN, United States, ⁶Physikalisch-Technische Bundesanstalt, Berlin, Germany

MR thermometry can offer real-time temperature information during RF ablation in the heart. As ECG-triggering can be unreliable in these situations, cardiac triggering based on the position of the ablation catheter could provide an alternative. Active tracking was used to continuously measure the position of microcoils inside the catheter. Cardiac triggers were determined after respiratory motion filtering. Temperature stability over time was below 2.5 ˚C.

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