Table 4.
Inter-reader agreement of luminal imaging and vessel-wall MRI findings (N=38).
| Reader | Agreement | |||||
|---|---|---|---|---|---|---|
| Luminal Findings | R1 | R2 | % Agree | Cohen's K | (95% CI) | |
| Collaterals | None | 14 (36.8) | 19 (50.0) | 57.9 | 0.35 | (0.07-0.61) |
| Mild | 15 (39.5) | 13 (34.2) | ||||
| Robust | 9 (23.7) | 6 (15.8) | ||||
| IVWM Findings | ||||||
| Eccentric lesion | 13 (34.2) | 14 (36.8) | 81.6 | 0.60 | (0.30-0.85) | |
| Remodeling | Outward | 12 (31.6) | 12 (31.6) | 84.2 | 0.63 | (0.40-0.85) |
| T2 signal of vessel wall | Heterogenous | 12 (31.6) | 12 (31.6) | 89.5 | 0.76 | (0.51-0.94) |
| Juxtaluminal hyperintensity | 11 (28.9) | 9 (23.7) | 94.7 | 0.86 | (0.64-1.00) | |
| Vessel wall enhancement | Yes | 18 (47.4) | 19 (50.0) | 92.1 | 0.84 | (0.65-1.00) |
| Enhancement intensity* (if enhanced) | Mild | 6 (35.3) | 11 (64.7) | 70.6 | 0.46 | (0.10-1.00) |
| Moderate | 11 (64.7) | 6 (35.3) | ||||
| Pattern of enhancement* (if enhanced) | Focal | 1 (5.9) | 1 (5.9) | 82.4 | 0.68 | (0.23-1.00) |
| Homogeneous | 11 (64.7) | 8 (47.1) | ||||
| Heterogeneous | 5 (29.4) | 8 (47.1) | ||||
Values are no. (%) unless otherwise specified;
ACA = anterior cerebral artery; MCA = middle cerebral artery; ICA = internal carotid artery; SCA = superior cerebellar artery;
*
Based on the 17 cases where both readers agreed on the presence of enhancement.