Table 2 Comparisons of tumor spectral CT parameters between two groups of colon cancer patients, and ICC between two radiologists’ measurements of parameters

C_AP (HU)

76.89 ± 15.44

78.31 ± 15.57

− 0.393

0.695

0.907

MonoE_40kev-AP (HU)

115.91 ± 44.79

144.95 ± 48.39.38

− 2.888

0.005^*

0.890

IoD_AP (mg/mL)

1.10 ± 0.42

1.18 ± 0.46

− 0.777

0.440

0.912

Z-eff_AP

7.93 ± 0.23

7.97 ± 0.26

− 0.723

0.472

0.901

λ_AP

1.71 ± 1.00

2.33 ± 0.83

− 2.795

0.006^*

0.889

C_VP (HU)

80.29 ± 11.52

85.56 ± 10.50

− 2.014

0.047^*

0.893

MonoE_40kev-VP (HU)

138.06 ± 37.78

175.91 ± 47.57

− 3.953

0.000^*

0.904

IoD_VP (mg/mL)

1.29 ± 0.36

1.50 ± 0.36

− 2.518

0.014^*

0.897

Z-eff_VP

8.03 ± 0.18

8.14 ± 0.17

− 2.574

0.012^*

0.886

λ_VP

2.23 ± 0.86

3.01 ± 1.03

− 3.678

0.000^*

0.915

AEF

0.88 ± 0.31

0.77 ± 0.27

1.497

0.138

0.898