Fig. 4
From: Computed tomography scan based prediction of the vulnerable carotid plaque
a Graph indicating strong positive linear correlation in measuring CALS between CTA and NCCT. (b) Bland-Altman plot. X-axis shows the mean calcification score of the two methods. Y-axis shows the difference of the calcification score measured by the two methods. The red line indicates mean difference, black lines indicate the 95% confidence levels of the mean. Circle dots indicates mean values for CALS between CTA and NCCT. If no association between the difference of the measurements existed, the dots should be placed on the redline, but here a clear tendency of increased disagreement with increasing calcification is observed