Abstract #0205

In vivo monitoring of percutaneous thermal ablation by simultaneous MR Elastography and Thermometry

Nadège Corbin¹, Jonathan Vappou¹, Pramod Rao¹, Benoit Wach¹, Laurent Barbé¹, Pierre Renaud¹, Michel de Mathelin¹, and Elodie Breton¹

¹ICube-University of Strasbourg, Strasbourg, France

MR-guided percutaneous thermal ablations are currently monitored by MR thermometry. However, no information related to intrinsic property changes of the tissue is available during the procedure. The feasibility of monitoring in vivo thermal ablations by simultaneous Magnetic Resonance Elastography (MRE) and MR-thermometry is demonstrated in this work. The interventional MRE system includes a needle MRE driver, a respiratory triggered gradient-echo sequence with motion encoding and an online reconstruction method that provides elasticity and temperature measurements in real-time. Changes in elasticity and temperature occurring during laser thermal ablation are successfully measured in vivo over 20 minutes thanks to this interventional MRE system.

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