Table 2:

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).