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Abstract #4146

Feasibility of Multipolar Radiofrequency Ablation in the Pig Liver Under Simultaneous Real-Time MR Thermometry

Matthieu Lepetit-Coiffe1, Alexandru Cernicanu2, Olivier Seror, 1,3, Thomas Stein4, Yasmina Berber1, Mario Ries1, Chrit T. Moonen1, Bruno Quesson1

1Laboratoire IMF CNRS UMR 5231 / Universite Bordeaux 2, Bordeaux, France; 2Philips Healthcare, Suresnes, France; 3Service de Radiologie, Hopital Jean Verdier, Bondy, France; 4Celon/Olympus, Teltow, Germany

The feasibility of real-time MR thermometry for monitoring multipolar RF ablation was demonstrated both ex vivo and in vivo on a pig liver. The quality of the real-time thermal dose maps appeared satisfactory in the presence of respiratory motion and cyclic switching between the different pairs of RF electrodes. The large (about 250 cm3) resulting thermal coagulation volume was spatially homogeneous as predicted by the real-time lethal thermal dose maps and confirmed by the post procedural MR imaging and histology.