Interobserver agreement among readers 1, 2, and 3 for each set of images according to the area considered
| CT | MRI | |||||
|---|---|---|---|---|---|---|
| 2D FLAIR | 3D FLAIR | 2D T2* | 3D SWI | 3D DIR | ||
| Total | ||||||
| R1 vs R2 (95% CI) | 1 (1–1) | 0.85 (0.77–0.93) | 0.79 (0.69–0.89) | 0.84 (0.76–0.91) | 0.79 (0.72–0.87) | 0.94 (0.91–0.97) |
| R1 vs R3 (95% CI) | 0.94 (0.85–1) | 0.68 (0.57–0.79) | 0.65 (0.53–0.76) | 0.74 (0.65–0.83) | 0.64 (0.55–0.73) | 0.90 (0.87–0.93) |
| R2 vs R3 (95% CI) | 0.94 (0.85–1.02) | 0.70 (0.60–0.81) | 0.70 (0.59–0.80) | 0.72 (0.63–0.81) | 0.73 (0.65–0.81) | 0.93 (0.91–0.96) |
| Subarachnoid | ||||||
| Interhemispheric | ||||||
| R1 vs R2 (95% CI) | 1 (1–1) | 0.91 (0.74–1) | 0.83 (0.60–1) | 0.76 (0.54–0.98) | 0.68 (0.44–0.92) | 1 (1–1) |
| R1 vs R3 (95% CI) | 1 (1–1) | 0.83 (0.60–1.06) | 0.76 (0.50–1.02) | 0.87 (0.70–1.05) | 0.44 (0.11–0.77) | 1 (1–1) |
| R2 vs R3 (95% CI) | 1 (1–1) | 0.91 (0.74–1.08) | 0.76 (0.50–1.02) | 0.77 (0.56–0.99) | 0.63 (0.39–0.88) | 1 (1–1) |
| Sylvian fissures | ||||||
| R1 vs R2 (95% CI) | 1 (1–1) | 1 (1–1) | 1 (1–1) | 0.94 (0.83–1) | 0.82 (0.63–1) | 0.95 (0.88–1) |
| R1 vs R3 (95% CI) | 1 (1–1) | 0.88 (0.66–1.11) | 1 (1–1) | 1 (1–1) | 0.59 (0.31–0.86) | 0.90 (0.81–1) |
| R2 vs R3 (95% CI) | 1 (1–1) | 0.88 (0.66–1.11) | 1 (1–1) | 0.94 (0.83–1.06) | 0.73 (0.50–0.96) | 0.95 (0.89–1.02) |
| Convexity | ||||||
| R1 vs R2 (95% CI) | 1 (1–1) | 0.83 (0.68–0.98) | 0.56 (0.27–0.84) | 0.73 (0.57–0.89) | 0.63 (0.43–0.84) | 0.90 (0.85–0.95) |
| R1 vs R3 (95% CI) | 0.83 (0.60–1.07) | 0.61 (0.42–0.81) | 0.48 (0.23–0.73) | 0.60 (0.42–0.78) | 0.63 (0.44–0.83) | 0.87 (0.81–0.92) |
| R2 vs R3 (95% CI) | 0.83 (0.60–1.07) | 0.60 (0.40–0.79) | 0.56 (0.33–0.80) | 0.56 (0.37–0.74) | 0.70 (0.55–0.86) | 0.90 (0.85–0.95) |
| Basal cisterns | ||||||
| R1 vs R2 (95% CI) | 1 (1–1) | 0.33 (−0.33–0.98) | 0.70 (0.41–0.99) | 0.74 (0.39–1) | 0.64 (0.36–0.92) | 0.94 (0.88–1) |
| R1 vs R3 (95% CI) | 1 (1–1) | 0.43 (−0.07–0.92) | 0.25 (−0.20–0.70) | 0.45 (−0.01–0.98) | 0.25 (−0.13–0.62) | 0.89 (0.82–0.97) |
| R2 vs R3 (95% CI) | 1 (1–1) | 0.39 (−0.29–1.07) | 0.30 (−0.17–0.77) | 0.74 (0.39–1.10) | 0.41 (0.09–0.73) | 0.95 (0.90–1) |
| Intraventricular | ||||||
| R1 vs R2 (95% CI) | 1 (1–1) | 1 (1–1) | 1 (1–1) | 1 (1–1) | 0.95 (0.85–1) | 1 (1–1) |
| R1 vs R3 (95% CI) | 1 (1–1) | 0 (−1.12–1.12) | 0 (−1.95–1.95) | 0.66 (0.19–1.13) | 0.86 (0.70–1.02) | 0 (−1.38–1.38) |
| R2 vs R3 (95% CI) | 1 (1–1) | 0 (−1.12–1.12) | 0 (−-1.95–1.95) | 0.66 (0.19–1.13) | 0.82 (0.64–1) | 0 (−1.38–1.38) |
Note:—R1–R3 indicate readers 1–3; Total, all the subarachnoid and ventricular areas; Convexity, bilateral frontal, parietal, temporal, and occipital convexity areas; Basal cisterns, perimesencephalic and prepontine cisterns and cisterna magna.