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Fig. 2 | Journal of Cardiovascular Magnetic Resonance

Fig. 2

From: Native contrast visualization and tissue characterization of myocardial radiofrequency ablation and acetic acid chemoablation lesions at 0.55 T

Fig. 2

Time course of ablation lesion appearance from acutely after ablation (Day 0, top row) to Day 21 after ablation (bottom row) for native contrast imaging (three leftmost columns) and gadolinium-based contrast enhanced imaging (two rightmost columns) of RF ablation lesions (green arrows) and chemoablation lesions (orange arrows). a, f Edema, as imaged by T2w enhancement, around areas of ablation on Day 0 is no longer seen by Day 21. b, g T1w enhancement seen on Day 0 can still be seen on Day 21. c, h However, T1 maps show a reduced magnitude of T1 decrease on day 21 compared to day 1. Early gadolinium enhanced (EGE) imaging (d, i) and late-gadolinium enhanced (LGE) imaging (e, g) show a hypo-enhancing lesion core and an enhancing lesion periphery. The peripheral area of enhancement diminished by Day 21 compared to Day 0, corresponding to reduction of edema by T2w imaging. Both RF ablation and chemoablation demonstrate scar observed on Day 21 post ablation

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