Table 2.
Predictive values of MRI examinations for rater 1 and rater 2 as well as inter-rater reliability for evaluation of T2-weighted images alone and in combination with 3D vPCA concerning shunt dysfunction
| T2-w | T2-w + 3D vPCA | |||
|---|---|---|---|---|
| Rater 1 | Rater 2 | Rater 1 | Rater 2 | |
| True positive | 9 | 10 | 12 | 13 |
| True negative | 22 | 26 | 25 | 25 |
| False positive | 5 | 1 | 2 | 2 |
| False negative | 4 | 3 | 1 | 0 |
| Sensitivity | 0.69 | 0.77 | 0.92 | 1.0 |
| Specificity | 0.82 | 0.96 | 0.93 | 0.93 |
| Inter-rater reliability | 0.71 | 0.84 | ||
T2-w T2-weighted, vPCA venous phase contrast MR angiography