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Table 2 Quantitative dual-layer spectral CT parameters from metastatic and non-metastatic ipsilateral axillary lymph nodes

From: Breast cancer: comparison of quantitative dual-layer spectral CT and axillary ultrasonography for preoperative diagnosis of metastatic axillary lymph nodes

 

Median

p value

Iodine density (mg/mL)

 

0.021

 Metastatic ipsilateral

2.47 ± 0.23

 

 Non-metastatic ipsilateral

1.25 ± 0.16

 

Spectral slope

 

< 0.001

 Metastatic ipsilateral

1.83 ± 1.18

 

 Non-metastatic ipsilateral

0.48 ± 0.70

 

Z effective

 

< 0.001

 Metastatic ipsilateral

111 ± 84.3

 

 Non-metastatic ipsilateral

209 ± 48.1

 

Conventional CT HU

 

< 0.01

 Metastatic ipsilateral

53.9 ± 29.3

 

 Non-metastatic ipsilateral

26.1 ± 19.1

 

VNC (HU)

 

0.063

 Metastatic ipsilateral

24.5 ± 14.3

 

 Non-metastatic ipsilateral

11.8 ± 13.3

 

Δ contrast enhancement (HU)

 

< 0.01

 Metastatic ipsilateral

29.2 ± 2.62

 

 Non-metastatic ipsilateral

10.8 ± 1.81

 
  1. CT Computed tomography, VNC Virtual non-contrast