Figure 2
Relationship of reproducibility with the mean measurement and with the plaque area. a. Bland-Altman plot of Ktrans. b. Bland-Altman plot of v p . c. Per-subject mean Ktrans (min−1) vs. per-subject between-scan SD of Ktrans (ρ = −0.02, p = 0.9), d. Per-subject mean v p (unitless) vs. per-subject between-scan SD of v p (ρ = 0.25, p = 0.15). e. Plaque areas (on the log-scale) vs. per-subject between-scan SD of Ktrans (ρ = −0.33, p = 0.06), f. Plaque areas (on the log-scale) vs. per-subject between-scan SD of v p (ρ = −0.45, p = 0.007). Dashed lines in panel (a) and (b) indicate the mean differences and limits of agreement (±2 × SD of differences) for Bland-Altman plots. Solid lines in panels (d-f) are least square fits. Fitted line in panel (d) excludes one outlier with mean v p above 0.20.