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Table 4 The lesion-based diagnostic performance of AI model in testing cohort and the comparison of the AI performance among few, medium and extensive lesion groups

From: Automatic identification of suspicious bone metastatic lesions in bone scintigraphy using convolutional neural network

  Group for number of lesions χ2 P value
Few Medium Extensive
Sensitivity 58.63 64.34 89.56 163.41  < 0.001
Specificity 89.41 85.24 62.85 108.69  < 0.001
Accuracy 81.78 78.03 82.79 8.06 0.018
PPV 64.89 69.67 87.37 83.70  < 0.001
NPV 86.76 82.04 67.93 49.24  < 0.001
  1. Chi-square test was performed to compare the performance of AI model among different groups of the number of lesions. Few lesions group: 1–3 lesions per image; Medium lesions group: 4–6 lesions per image; Extensive lesions group: > 6 lesions per image