Intravoxel incoherent motion DWI of the pancreatic adenocarcinomas: monoexponential and biexponential apparent diffusion parameters and histopathological correlations

Table 3 Results from the ROC analyses for the 9 parameters to distinguish between pancreatic adenocarcinoma and healthy pancreas

Parameters	Optimal cutoff values (×10⁻³mm²/s)	AUC	Sensitivities (%)	Spectificities (%)	PPV (%)	NPV (%)	ACC (%)
ADC₂₀	5.58	0.911	0.895	0.824	0.820	0.898	0.858
ADC₅₀	3.06	0.874	0.912	0.725	0.748	0.902	0.813
ADC₁₀₀	2.37	0.876	0.877	0.765	0.770	0.874	0.818
ADC₂₀₀	2.19	0.771	0.667	0.784	0.734	0.725	0.729
ADC₄₀₀	1.91	0.667	0.491	0.765	0.651	0.627	0.636
ADC₆₀₀	1.41	0.616	0.842	0.373	0.546	0.725	0.594
ADC₁₀₀₀	1.09	0.634	0.877	0.431	0.580	0.797	0.642
ADC_total	1.36	0.664	0.807	0.490	0.586	0.739	0.640
ADC_fast	5.86	0.828	0.895	0.706	0.731	0.883	0.795

ROC, operating characteristic curve; AUC, area under curve; ADC, apparent diffusion coefficient; PPV, positive predictive value; NPV, negative predictive value; ACC, accuracy

ISSN: 1470-7330