Regression and Bland-Altman analyses of right ventricular end-diastolic and end-systolic volume with manual correction. To the left is shown the linear regression analysis of right ventricular end-diastolic volume (EDV) and end-systolic volume (ESV) using 3-dimensional echocardiography (3DE) images against cardiac magnetic resonance (CMR), when manually correcting the semi-automatic delineation. Dashed line shows the linear regression line and full line the identity line. To the right is shown the Bland-Altman plot for EDV and ESV. The full lines show bias and the dashed lines are the limits of agreement (LOA) of ± 1.96 standard deviation (SD).