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Abstract #0023

High Spatial Resolution Free Breathing 3D T2 Mapping for Edema Detection in Radio Frequency Ablation

Haiyan Ding1,2, Di Xu1, M. Muz Zviman3, Valeria Sena-Weltin3, Luciano Amado3, Saman Nazarian3, Henry Halperin3, Elliot R. McVeigh1, Daniel A. Herzka1

1Department of Biomedical Engineering, Johns Hopkins School of Medicine, Baltimore, MD, USA; 2Department of Biomedical Engineering, Tsinghua University, Beijing, China, People's Republic of; 3Department of Medicine, Division of Cardiology, Johns Hopkins School of Medicine, Baltimore, MD, USA

Differentiating between viable myocardium, scar and injured tissue (edema) in both ventricles and atria can very helpful in predicting the recurrence of arrhythmias after radiofrequency ablation (RFA). We propose a 3D navigator gated imaging sequence designed for high resolution T2 mapping and edema detection. T2 maps pre- and post injection of contrast were generated from an interleaved series of T2-prepared 3D volumes acquired 2hrs post RFA the left atrium of a swine. Enhancement due to edema in pre-contrast T2map was confirmed by T2-STIR and delayed enhancement images. T2 values calculated were comparable to those previously reported.