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Table 3 Quantitative dual-layer spectral CT parameters from non-metastatic lymph nodes in arterial phase (contralateral axilla) and portal-venous phase (inguinal 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)   < 0.001
 Non-metastatic contralateral 0.93 ± 0.27  
 Inguinal lymph node 3.77 ± 0.14  
Spectral slope   < 0.001
 Non-metastatic contralateral 0.51 ± 0.83  
 Inguinal lymph node 2.36 ± 0.91  
Z effective   < 0.001
 Non-metastatic contralateral 205 ± 53.8  
 Inguinal lymph node 79 ± 42.7  
Conventional CT HU   < 0.001
 Non-metastatic contralateral 24.4 ± 26.4  
 Inguinal lymph node 69.7 ± 26.6  
VNC (HU)   
 Non-metastatic contralateral 9.4 ± 19.2 0.092
 Inguinal lymph node 16.8 ± 14.8  
Δ contrast enhancement (HU)   < 0.001
 Non-metastatic contralateral 12.6 ± 2.2  
 Inguinal lymph node 50.6 ± 1.4  
  1. Data are given as mean ± standard deviation
  2. CT Computed tomography, VNC Virtual non-contrast