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Table 3 The slope of 3 energy decay curve sections in benign and malignant SPN

From: A pilot study using low-dose Spectral CT and ASIR (Adaptive Statistical Iterative Reconstruction) algorithm to diagnose solitary pulmonary nodules

Groups

Arterial phase

Venous phase

40-70 keV

70-100 keV

100-140 keV

40-70 keV

70-100 keV

100-140 keV

Malignant SPN(n = 42)

3.473 ± 1.121

0.781 ± 2.975

0.359 ± 0.119

4.147 ± 1.356

1.793 ± 1.465

0.425 ± 0.141

Benign SPN(n = 20)

3.396 ± 2.578

0.835 ± 0.712

0.357 ± 0.276

2.670 ± 0.697

0.761 ± 0.351

0.289 ± 0.083

t value

0.09

0.231

0.030

3.803

2.846

3.205

P value

0.930

0.822

0.976

0.001

0.010

0.004