(Fig. 2 set here)
A total of 3654 slice of CT pictures have been reviewed. The pneumonia event incidence was 74.3%. The FiO2 was 0.6 (0.21–0.6), the PaO2/FiO2ratio 160mmHg (50–237mmHg), and the PaCO2 was 38.6mmHg (21.7–41.8mmHg). Neutrophil counting was 7.52×109/L (1.19–10.44×109/L), leukomonocyte was 0.77×109/L (0.1–1.26×109/L), mononuclear macrophage counting was 0.48×109/L (0.08–0.68×109/L), and the C reaction protein was 19.56mg/L (0.59–47.60mg/L), among these patients. The clinical baseline data were listed in Table 1.