Predictive ability of ADC criteria for salivary gland tumors
| Diagnostic Ability | Cutoff Points of Percentage Area Having High ADCs for the Diagnosis of Malignant Tumors | |||
|---|---|---|---|---|
| <3% | <5% | <10% | <15% | |
| Sensitivity (%) | 56 | 89 | 89 | 89 |
| Specificity (%) | 100 | 100 | 73 | 59 |
| Accuracy (%) | 87 | 97 | 77 | 68 |
| PPV (%) | 100 | 100 | 100 | 100 |
| NPV (%) | 85 | 96 | 70 | 57 |
Note:—PPV indicates positive predictive value; NPV, negative predictive value.
On the ADC map image that demonstrates the maximum tumor area of a salivary gland tumor, diagnostic abilities for the diagnosis of malignant tumors were calculated after varying the cutoff point of percentage area having high ADCs (≥1.8 × 10−3 mm2/s).