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Abstract #0120

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

Ronald Mooiweer1, Rainer Schneider2, Radhouene Neji1,3, Rahul K Mukherjee1, Steven Williams1, Li Huang1, Valéry Ozenne4, Pierre Bour4, Jason Stroup5, Tom Lloyd5, Pierre Jaïs4, Bruno Quesson4, Mark O'Neill1, Tobias Schaeffter1,6, 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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