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. Author manuscript; available in PMC: 2021 Oct 15.
Published in final edited form as: Nat Biomed Eng. 2021 Apr 15;5(6):509–521. doi: 10.1038/s41551-021-00704-1

Fig. 3. Performance of the AI system in the discrimination of viral pneumonia, other types of pneumonia, and absence of pneumonia, from CXR images.

Fig. 3

Receiver operating characteristic curves (ROC) and normalized confusion matrices of the classification model. a and b, AI system’s performance on the hold-out test dataset. c and d, The AI system’s performance on the independent external validation data in the China cohort. For the three-way classification. e and f, The AI system’s performance on the external validation set for subjects screening for suspicious pneumonia. CI, confidence interval.