Table 8.
Diagnostic performance of MRI parameters in detecting hard adenomas.
| Parameters | AUC | Optimal Cut-Off Value | Sensitivity (%) | Specificity (%) | Accuracy (%) |
|---|---|---|---|---|---|
| rT1 | 0.578 | 0.866 | 60.0 (9/15) | 64.7 (22/34) | 63.3 (31/49) |
| rT2 | 0.555 | 1.551 | 53.3 (8/15) | 64.7 (22/34) | 61.2 (30/49) |
| ADC | 0.566 | 0.674 (10−3 mm2/s) | 46.7 (7/15) | 73.5 (25/34) | 65.3 (32/49) |
| ve | 0.712 | 0.365 | 40.0 (6/15) | 100 (34/34) | 81.6 (40/49) |
| vp | 0.583 | 0.100 | 93.3 (14/15) | 26.5 (9/34) | 46.9 (23/49) |
| Ktrans | 0.703 | 0.560 (/min) | 80.0 (12/15) | 67.7 (23/34) | 71.4 (35/49) |
| kep | 0.582 | 1.980 (/min) | 60.0 (9/15) | 67.7 (23/34) | 65.3 (40/49) |
rT1: ratio of signal intensity on T1-weighted MRI; rT2: ratio of signal intensity on T2-weighted MRI; ve: volume of extravascular extracellular space per unit volume of tissue; vp: blood plasma volume per unit volume of tissue; Ktrans: volume transfer constant between blood plasma and extravascular extracellular space; kep: rate constant between extravascular extracellular space and blood plasma.