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Keywords:
Vascular, CNS, Neuroradiology brain, MR, MR-Angiography, Imaging sequences, Arteriosclerosis, Ischaemia / Infarction
Authors:
L. Chen, Q. Liu, X. Tian, Q. Zhan, C. Ma, Y. Jiang, W. Peng, B. Tian, J.-P. Lu; Shanghai/CN
DOI:
10.1594/ecr2016/C-0430
Results
Statistical results of interscan and intraobserver reproducibility are presented in Tables 1 and 2,
respectively.
For interscan reproducibility,
ICCs were excellent for PA (0.975),
SR (0.952) and PPB (0.941),
and the CVs of interscan measurements were ranged from 7.52% to 9.17%.
For intraobserver reproducibility,
ICCs were excellent for PA (0.988),
SR (0.971) and PPB (0.970),
respectively,
and the CVs of intraobserver measurements were ranged from 6.04% to 6.92%.
Moreover,
the intervals defined by Bland-Altman plots of PA,
SR and PPB were narrow in comparison to the mean in repeated measurements (Figures 2-7).
Table 1: ICC and CV of PA, SR and PPB in evaluation of interscan variability.
Table 2: ICC and CV of PA, SR and PPB in evaluation of intraobserver variability.
Fig. 2: Bland-Altman plot of intrascan variability for plaque area measurements
Fig. 3: Bland-Altman plot of intrascan variability for stenosis rate measurements
Fig. 4: Bland-Altman plot of intrascan variability for percent plaque burden measurements
Fig. 5: Bland-Altman plot of interobserver variability for plaque area measurements
Fig. 6: Bland-Altman plot of interobserver variability for stenosis rate measurements
Fig. 7: Bland-Altman plot of interobserver variability for percent plaque burden measurements.