Preoperatively Grading Rectal Cancer with the Combination of Intravoxel Incoherent Motions Imaging and Diffusion Kurtosis Imaging

Table 3

ROC analysis results of different DWI inspirations and their combinations.

	Sensitivity (%)	Specificity (%)	AUC	Youden Index
D	94.4	87.5	0.912	0.819
f	77.8	92.5	0.843	0.703
Dapp	88.9	85.0	0.901	0.739
Kapp	88.9	85.0	0.910	0.739
D and f	94.4	87.5	0.946	0.819
D and Kapp	94.4	87.5	0.951	0.819
f and Kapp	88.9	87.5	0.901	0.764
D and f and Kapp	94.4	87.5	0.953	0.819

^※D: true diffusion coefficient, D: pseudodiffusion coefficient, D_app: apparent diffusion coefficient derived from DKI, f: perfusion fraction, K_app: apparent diffusion kurtosis coefficient.