Table 3.
Diagnostic ability of T1 mapping using PSIR by ROC analysis.
| Pre-contrast T1 value (ms) | Post-contrast T1 value (ms) | T1 reduction rate (%) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AUC | Specificity | Sensitivity | Cut-off | AUC | Specificity | Sensitivity | Cut-off | AUC | Specificity | Sensitivity | Cut-off | |
| HCC vs. hemangioma | 0.947 | 1.000 | 0.848 | > 1742 | 0.788 | 0.605 | 0.879 | > 716 | 0.947 | 1.000 | 0.788 | > 50 |
| 95% CI | 0.891−1.000 | 0.908−1.000 | 0.691−0.934 | 0.678−0.898 | 0.447−0.744 | 0.727−0.952 | 0.900−0.995 | 0.908−1.000 | 0.623−0.893 | |||
| HCC vs. metastatic tumor | 0.817 | 0.868 | 0.633 | > 1325 | 0.757 | 0.658 | 0.767 | > 769 | 0.639 | 0.421 | 0.867 | > 26 |
| 95% CI | 0.717−0.917 | 0.727−0.943 | 0.455−0.781 | 0.642−0.872 | 0.499−0.788 | 0.591−0.882 | 0.505−0.774 | 0.279−0.578 | 0.703−0.947 | |||
| HCC vs. cyst | 1.000 | 1.000 | 1.000 | > 2586 | 1.000 | 1.000 | 1.000 | > 2246 | 0.977 | 0.974 | 0.929 | < 10 |
| 95% CI | 1.000−1.000 | 1.000−1.000 | 1.000−1.000 | 1.000−1.000 | 1.000−1.000 | 1.000−1.000 | 0.938−1.000 | 0.865−0.999 | 0.685−0.996 | |||
| Hemangioma vs. metastatic tumor | 0.772 | 0.849 | 0.600 | < 1742 | 0.544 | 0.576 | 0.567 | < 940 | 0.836 | 0.970 | 0.600 | < 39 |
| 95% CI | 0.655−0.889 | 0.691−0.934 | 0.423−0.754 | 0.401−0.688 | 0.408−0.728 | 0.392−0.726 | 0.734−0.939 | 0.847−0.998 | 0.423−0.754 | |||
| Hemangioma vs. cyst | 0.903 | 0.849 | 1.000 | > 3387 | 1.000 | 1.000 | 1.000 | > 2585 | 1.000 | 1.000 | 1.000 | < 25 |
| 95% CI | 0.811−0.994 | 0.691−0.934 | 0.785−1.000 | 1.000−1.000 | 0.896−1.000 | 0.785−1.000 | 1.000−1.000 | 0.896−1.000 | 0.785−1.000 | |||
| Metastatic tumor vs. cyst | 0.988 | 0.967 | 1.000 | > 3159 | 1.000 | 1.000 | 1.000 | > 2740 | 0.971 | 0.900 | 1.000 | < 20 |
| 95% CI | 0.962−1.000 | 0.833−0.998 | 0.785−1.000 | 1.000−1.000 | 0.896−1.000 | 0.785−1.000 | 0.930−1.000 | 0.744−0.965 | 0.785−1.000 | |||
CI: confidence interval.