Table 2.

Diagnostic performance for IVIM-DKI indexes and their combinations in assessing radiotherapeutic response

Variable	Youden Index	AUC	(95%CI)	Sensitivity (%)	Specificity (%)
Dt	0.556	0.802	(0.623–0.921)	55.56	100.00
fp	0.452	0.742	(0.558–0.880)	66.67	78.57
MK	0.532	0.762	(0.579–0.894)	88.89	64.29
Dt and fp	0.579	0.857	(0.688–0.955)	72.22	85.71
Dt and MK	0.691	0.905	(0.748–0.980)	83.33	85.71
fp and MK	0.508	0.798	(0.619–0.918)	72.22	78.57
Dt and fp and MK	0.746	0.913	(0.758–0.983)	88.89	85.71

Dt Tissue diffusion, fp Perfusion fraction, Dp Pseudo-diffusion, MK Mean kurtosis, MD Mean diffusion coefficient