Table 2.

Diagnostic performance of different criteria for the detection of retropharyngeal lymph nodes

Size and ADC criteria	Cut-off point	Sensitivity	Specificity	Accuracy
Short-axis diameter	4.50	0.760	0.765	0.838
Long-axis diameter	6.50	0.785	0.706	0.809
Mean ADC	0.929	0.918	0.902	0.938
Minimum ADC	0.8905	0.957	0.951	0.965

ADC, apparent diffusion coefficient.