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Table 2 Diagnostic effectiveness of DSCT Parameters

From: Nomogram based on spectral CT quantitative parameters and typical radiological features for distinguishing benign from malignant thyroid micro-nodules

DSCT Parameters

AUC(95CI%)

Sensitivity

Specificity

Cutoff value

P value

AP40keV

0.825 (0.781–0.869)

0.744

0.753

312.20

<  0.001

AP70keV

0.766 (0.716–0.817)

0.709

0.735

126.35

<  0.001

AP100keV

0.619 (0.560–0.679)

0.581

0.594

79.60

<  0.001

APλHU

0.829 (0.787–0.872)

0.738

0.753

3.89

<  0.001

APNIC

0.781 (0.732–0.829)

0.733

0.706

0.33

<  0.001

APNZeff

0.703 (0.649–0.758)

0.624

0.663

0.82

<  0.001

VPNIC

0.588 (0.527–0.648)

0.558

0.571

0.75

0.005

VPNZeff

0.606 (0.545–0.666)

0.547

0.605

0.96

<  0.001

  1. AP arterial phase, VP venous phase, λHU the slope of spectral HU curve, NIC normalized iodine concentration, NZeff normalized effective atomic number