Table 1 Vessel wall and lumen measurements averaged over all assessed segments and corresponding ICC values of inter-scan, intra-observer, and inter-observer reproducibilities of 3D intracranial vessel wall MR in healthy subjects
|  |  | inter-scan (n = 160) | Intra-observer (n = 160) | Inter-observer (n = 160) | |||
|---|---|---|---|---|---|---|---|
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) | 42.0 ± 16.4 | 42.9 ± 16.8 | 0.99 (0.98–0.99) | 43.3 ± 16.6 | 0.99 (0.98–0.99) | 40.4 ± 17.4 | 0.98 (0.97–0.99) |
Wall volume (mm3) | 49.7 ± 15.8 | 49.5 ± 16.6 | 0.98 (0.98–0.99) | 50.1 ± 15.4 | 0.99 (0.98–0.99) | 45.7 ± 17.2 | 0.93 (0.80–0.96) |
Normalized wall index | 0.55 ± 0.04 | 0.54 ± 0.05 | 0.87 (0.80–0.91) | 0.54 ± 0.04 | 0.93 (0.89–0.95) | 0.53 ± 0.06 | 0.76 (0.63–0.83) |
Mean wall thickness (mm) | 0.71 ± 0.11 | 0.70 ± 0.13 | 0.95 (0.93–0.96) | 0.71 ± 0.11 | 0.96 (0.95–0.97) | 0.67 ± 0.14 | 0.83 (0.67–0.89) |
Maximum wall thickness (mm) | 0.86 ± 0.12 | 0.85 ± 0.15 | 0.93 (0.90–0.95) | 0.86 ± 0.13 | 0.95 (0.93–0.96) | 0.85 ± 0.18 | 0.84 (0.78–0.88) |