Given the thin nature of the left atrial (LA) wall and the need to perform respiratory gating, the clinical translation of LA late gadolinium-enhanced (LGE) MRI has proven challenging, particularly at 1.5 Tesla. To address this, a recent study described development of a self-navigated, free-breathing 3D LA LGE pulse sequence using stack-of-stars k-space sampling and XD-GRASP reconstruction. Here, we aim to derive the cut point for LA fibrosis for this 3D LA LGE technique, by using image intensity ratio (LA wall/blood signal) of healthy volunteers, and evaluate LA fibrosis in patients with and without atrial fibrillation.
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