Table 4 Demonstrates interobserver agreement regarding the CEI and lesion to background contrast ratio on CE-FLAIR and CE-T1WI among studied cases
|  | 1st observer n = 61 | 2nd observer n = 61 | ICC | 95% CI |
|---|---|---|---|---|
Contrast enhancement index (CEI) | 88 (0.5–651) | 83.0 (0.5–651.0) | 0.959 | 0.933–0.975 |
Lesion to background contrast ratio on CE-FLAIR images | 0.40 (0.02–1.89) | 0.428 (0.03–1.89) | 0.917 | 0.865–0.949 |
Lesion to background contrast ratio on CE-T1WI | 0.168 (0.01–0.81) | 0.177 (0.02–0.81) | 0.890 | 0.823–0.932 |