Figure 1From: Simulations for determining the optimal enhancement ratio threshold for segmentation of left atrial fibrosisAtrial wall-blood enhancement ratio (ER) is plotted vs. minutes post injection for 0.2 mmol/kg Gd-DTPA, for multiple atrial wall extracellular volume fractions (ECV). T1b was simulated as 300, 340, 360 and 370ms for the 20 to 50 minutes time-points. The T1a values at 30 minutes are shown.Back to article page