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Table 3 HU measurements that differed significantly in metastatic and negative lymph nodes

From: Computed tomography Hounsfield units can predict breast cancer metastasis to axillary lymph nodes

  Cutoff value Sensitivity Specificity PPV NPV Accuracy
  (HU) (%) (%) (%) (%) (%)
Lymph node NC-CT       
   Mean HU 16 83.7 64.6 58.6 86.9 71.8
   Maximum 54 79.6 80.5 70.9 86.8 80.2
Lymph node CE-CT       
   Mean HU 60 85.7 58.5 55.3 87.3 68.7
   Maximum HU 103 83.7 72 64.1 88.1 76.3
  1. CE-CT: contrast-enhanced computed tomography; HU: Hounsfield unit; NC-CT: non-contrasting computed tomography; NPV: negative predictive value; PPV: positive predictive value.