Continuous Monitoring of Radiofrequency Ablation using MR-based Fast Conductivity Imaging Method

Estimation of ablated lesion and control of RF power is important to reduce local recurrence after RF ablation, there still exist needs for new bio-imaging technique providing a non-invasive monitoring of RF ablation. We proposed MR-based fast conductivity imaging for monitoring of RF ablation using biological tissues. Fast MREIT produces conductivity images at every 10.24 seconds during RF ablation. We could extract spatiotemporal maps of tissue conductivity from a time series of 180 conductivity images for 30.72 minutes. Analyzing the time series of conductivity images, we could distinguish six different stages and separately interpret temperature-dependent and/or structure-dependent conductivity changes.

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