Diagnostic accuracy of apparent diffusion coefficient to differentiate intrapancreatic accessory spleen from pancreatic neuroendocrine tumors

Table 2 Diagnostic performances of absolute apparent diffusion coefficient and normalized apparent diffusion coefficient values

Variables	AUC	Sensitivity, %	Specificity, %	PPV, %	NPV, %	Accuracy, %
aADC as × 10-3 mm2/s	0.94	81.25	100	100	81.25	89.66
rADC	0.91	81.25	92.31	92.86	80.00	86.21

aADC: Absolute apparent diffusion coefficient; AUC: Area under curve; NPV: Negative predictive value; PPV: Positive predictive value; rADC: Normalized apparent diffusion coefficient (lesion-to-spleen apparent diffusion coefficient ratios).