Table 6.

ROC results of PS, IC^v, NIC^v, and λ_HU^v values differentiating HRT* from TC.

HRT* vs. TC	P	cutoff value	AUC	Sensitivity (%)	Specificity (%)	Accuracy(%)	PPV(%)	NPV(%)
PS	0.019	<17.40 ml/min/100 g	0.715	88.2	48.0	64.3	53.6	92.9
ICv	0.005	<11.42 × 102 μg/cm3	0.849	82.4	88.0	85.7	82.4	95.7
NICv	0.010	<0.356	0.769	47.1	100.0	78.6	100.0	73.5
λHUv	0.003	<1.81	0.862	82.4	88.0	85.7	82.4	95.7

ROC, receiver operating characteristic curve; AUC, area under the receiver operating characteristic curve.

PS, permeability surface; IC, iodine concentration; NIC, normalized iodine concentration; λ_HU, slope of spectral HU curve; V, the optimal venous phase.

NPV, negative predictive value; PPV, positive predictive value.

TC, thymic carcinoma.