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Abstract #4564

3D Late Gadolinium Enhancement Imaging with Dynamic-TI in Patients with Atrial Fibrillation

Jennifer Keegan1, Peter David Gatehouse1, Sonya V. Babu-Narayan1, 2, Ricardo Wage1, Shouvik Haldar3, David N. Firmin1, 2

1Cardiovascular Biomedical Research Unit, Royal Brompton and Harefield NHS Trust, London, United Kingdom; 2Imperial College, London, United Kingdom; 3Cardiology, Royal Brompton and Harefield NHS Trust, London, United Kingdom

3D late gadolinium enhancement (LGE) imaging is performed with single R-wave gating to reduce the acquisition duration, but image quality in patients with atrial fibrillation (AF) is poor due to inconsistent longitudinal magnetisation recovery between cardiac cycles. Image quality could potentially be improved by implementing a dynamic-TI algorithm. Three-D data were acquired in 7 patients with variable heart rates (6 prior to RF ablation of AF), both with and without the dynamic-TI algorithm. We show that dynamic adaptation of the inversion time with each cardiac cycle results in less ghosting and improved image quality in this difficult patient population.