FIGURE 2.

Examples of CXR Severity Score Assignment. a: CXR showing focal bilateral GGO in the lower fields (frames). On both left and right lung, the involvement was < 25%; therefore, the CXR severity score assigned was 1 for each lung, with a global score of 2. b: CXR showing bilateral parenchymal opacities (frames): a huge area of consolidation in the middle-lower left fields with contextual air bronchogram, while a focal area of GGO is recognizable in the upper fields of the left lung; the extension on the left side was > 50% (score 3), whereas the involvement on the right side was < 25% (score 1); therefore, the overall score was 3 + 1 = 4. c: CXR showing bilateral involvement, with mixed areas of GGO and consolidation (frames) involving all the lung fields. On both left and right lung, the involvement was > 75% (score 4); therefore, the global score was 4 + 4 = 8.