Figure 3

Bland-Altman plots compare the assessment of thrombus area on different MRI sequences and histology. A, MTC and B, DW images tend to underestimate the thrombus area. C, T1W and D, T2W images tend to overestimate the thrombus area. Although the area of the thrombus measured on different MRI sequences was within the 95% limit of agreement, the level of agreement was higher for MTC (A) and DW (B) images as indicated by the tighter clustering of the data points around the median value. Conversely, larger differences were observed in the area of the thrombus calculated using the T1W (C) and T2W images (D) as compared to histology (scattered data points). Furthermore, there was a trend for MTC and DWI to slightly underestimate the area of the thrombus compared to histology (6% and 17.6%, respectively). Conversely, the thrombus area was overestimated on T1W images (53.7%) and T2W images (46.4%).