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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