Typical lesion appearance from the 3D TWILITE sequence (TI =700 ms, no contrast agent), acquired 9 min (a) and 80 min (b) after septal LV ablation. Lesion core is enhanced and surrounded by a dark transition band of edema, hematoma, and CBN. Anatomy and treatment may be rendered in 3D using simple thresholding and pseudo-coloring (c), which may be useful for treatment monitoring, targeting, or navigation.