Radiofrequency ablation (RFA) is a first-line treatment for controlling atrial fibrillation (AF). Visualizing fibrotic tissues as well as the surrounding anatomical structure could improve the delivery of therapy. In this work, an independent navigator-gated three-dimensional dark-blood phase-sensitive inversion recovery sequence was developed for atrial visualization. Dark-blood was achieved by optimizing inversion recovery and T2-preparation timing. Preliminary results from in vivo imaging in patients with AF post RFA demonstrate that the proposed technique can clearly visualize the atrial wall and scar formation. Both dark blood contrast and high resolution (1.25×1.25×3 mm3) were achieved.