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Abstract #4557

Navigator Artefact Reduction in 3D Late Gadolinium Enhancement Imaging

Jennifer Keegan1, Peter Drivas2, David N. Firmin1, 3

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

Navigator-gated 3D late gadolinium enhancement (LGE) imaging demonstrates the degree and distribution of atrial scarring both before and after RF ablation of atrial fibrillation. An artefact originating from the slice-selective navigator-restore pulse is frequently present in the right pulmonary veins, obscuring the vein and atrial walls and making quantification of enhancement difficult. We describe a simple sequence modification to remove this artefact and demonstrate its application in 9 patients.