Technical - Interventional CMR-Native Contrast Visualization of Myocardial Radiofrequency Ablation and Acetic Acid Chemoablation Lesions at 0.55 T

Native Contrast Visualization of Myocardial Radiofrequency Ablation and Acetic Acid Chemoablation Lesions at 0.55 T

Video Transcription

Video Summary

The speaker presents low-field MRI results for visualizing cardiac ablation lesions in swine. Using non-contrast T1-weighted, T2-weighted, T1 mapping, and real-time imaging at 0.55T, the team compared radiofrequency ablation with chemical ablation using acetic acid. Both lesion types were visible, but chemical ablation produced a larger T1 change and was more conspicuous, including in near real-time single-shot imaging. Histology confirmed lesion appearance and showed RF lesions had a wider transition zone. The study suggests ablation necrosis can be monitored at low field, with chemical ablation especially promising for MR-guided interventions.

Keywords

low-field MRI

cardiac ablation lesions

T1 mapping

chemical ablation

MR-guided interventions