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Abstract #0524

Wide-Bore 1.5 Tesla MR-System for Monitoring of Hepatic Radiofrequency Ablation: Initial Experience in the Treatment of 60 Metastases

Stephan Clasen1, Hansjrg Rempp1, Andreas Boss1, Christina Schraml1, Diethard Schmidt1, Fritz Schick2, Claus Claussen1, Philippe Pereira3

1Department of Diagnostic and Interventional Radiology, University of Tbingen, Tbingen, Germany; 2Section of Experimental Radiology, University of Tbingen; 3SLK Kliniken Heilbronn

MR-guided radiofrequency (RF) ablation using a wide-bore 1.5 Tesla MR-system was evaluated in the treatment of 60 hepatic metastases in 30 patients. Monitoring of ablation therapy was performed by using native T1w and T2w imaging. In addition MR temperature mapping by using the proton resonance frequency shift (PRF) method was applied. Complete coagulation was achieved in 58/60 (96.7%) metastases assessed during the mean follow-up of 5 months (range: 1 12 months). In conclusion, MR-guided RF ablation using a wide-bore 1.5 Tesla MR-system is an effective therapy in the local treatment of hepatic metastases.