Table 2.

The proposed scoring system (CO X-RADS) for the analysis of chest X-ray severity

Score	Description
0	Normal lung vascularity and hilar shadows, clear lung fields, clear pleural reflections
1	Prominent central linear lung shadowing (mainly vascular shadowing)
2	1+ accentuated hilar shadows + increased fine linear interstitial shadowing (thick interstitium)
3	2+ fine soft tissue micronodular like (micro-beaded like appearance) possible perivascular/peribronchial micro-infiltrates and or end on prominent tiny vessels (more basal and peripheral).
4	3+ Short relatively thick linear shadows mainly peripheral (septal lines i.e. Kerley’s lines) + or- fine honeycomb pattern, haziness of hilum, haziness of vascular markings or all.
5	3+ one or few small ill-defined patches of diminished aeration (alveolar shadowing -GGO) mainly peripherally oriented and involving 1 or 2 lobes.
6	3+multiple variable sized ill-defined patches of alveolar shadowing more peripheral involving more than 2 lobes.
7	6+ one or few small patches of relatively denser consolidation involving 1 lobe.
8	6+ few or multiple variable sized patches of consolidation (confluent or discreet) involving 2 lobes.
9	6+ multiple variable sized areas of consolidations (confluent or discreet) involving more than 2 lobes
10	8 or 9 + relatively thick peripheral linear shadowing (atelectatic/fibrotic band/s, + septal lines, Kerley’s B and or A &C lines) or 8 or 9 + pleural effusion, 8 or 9 + enlarged hilar shadows.