Table 2.
Vessel wall and lumen measurements at the most stenotic plaques and corresponding ICC values of inter-scan, intra-observer, and inter-observer reproducibilities of 3D intracranial vessel wall MR in patients
| Inter-scan (n = 9) | Intra-observer (n = 9) | Inter-observer (n = 9) | |||||
|---|---|---|---|---|---|---|---|
| 1st scan, 1st observer, 1st measurement (mean ± SD) |
2nd scan, 1st observer (mean ± SD) |
ICC (95% CI) |
1st scan, 1st observer, 2nd measurement (mean ± SD) |
ICC (95% CI) |
1st scan, 2nd observer (mean ± SD) |
ICC (95% CI) |
|
| Lumen volume (mm3) | 25.1 ± 18.2 | 26.57 ± 21.33 | 0.99 (0.94–0.99) |
25.7 ± 17.6 | 0.99 (0.99–0.99) |
23.7 ± 18.0 | 0.99 (0.96–0.99) |
| Wall volume (mm3) | 54.2 ± 32.6 | 55.36 ± 31.82 | 0.99 (0.97–0.99) |
54.5 ± 29.4 | 0.99 (0.96–0.99) |
50.2± 26.3 | 0.98 (0.90–0.99) |
| Normalized wall index | 0.69 ± 0.08 | 0.69 ± 0.10 | 0.93 (0.66–0.98) |
0.69 ± 0.09 | 0.98 (0.89–0.99) |
0.69 ± 0.10 | 0.92 (0.65–0.98) |
| Mean wall thickness (mm) | 0.90 ± 0.29 | 0.92 ± 0.28 | 0.97 (0.89–0.99) |
0.91 ± 0.25 | 0.97 (0.89–0.99) |
0.88 ± 0.25 | 0.97 (0.86–0.99) |
| Maximum wall thickness (mm) | 1.35 ± 0.37 | 1.39 ± 0.31 | 0.91 (0.59–0.98) |
1.44 ± 0.37 | 0.94 (0.76–0.99) |
1.25 ± 0.29 | 0.87 (0.49–0.97) |
SD standard deviation, ICC intra-class correlation coefficient, CI confidence intervals