Fig. 4.
Mean tissue-to-background ratio (TBRmean) and mean abdominal Aortic Microcalcification Activity (AMA). Bland-Altmann plots with actual difference (left side) and percentage difference (right side), mean bias (blue line) and 95% limits of agreement (red lines) for: All regions without applying threshold (a), all regions after applying threshold (b), aneurysm region without variable radius (c), aneurysm region with variable radius (d), all regions after applying both threshold and variable radius (e). Y-axis limits in the actual difference plots are set to the mean of the values. AMA, aortic microcalcification activity; ICC, intraclass correlation coefficient; LOA, limits of agreement; TBR, tissue-to-background ratio