Fig. 4

Correlation and bias of left atrial clinical measures between an expert manual segmentation and a the automated method, and b segmentation by a second observer, on a set of 37 patients. The first column of each analysis shows the regression plots whereas the second shows the Bland-Altman plots of the end-diastolic volume (EDV), in brown, the end-systolic volume (ESV), in blue, the ejection fraction (EF), in purple, and the global longitudinal strain (GLS), in green, distributed in consecutive rows. In each scatter plot the red line denotes the regression line and the black line denotes the identity line, whereas in each Bland-Altman plot, the red line denotes the mean difference (bias) and the two light dotted lines denote ± 1.96 standard deviations from the mean