Comments on "Review of the role of diagnostic modalities and imaging findings in the COVID-19 pandemic"

Table 1 Radiological assessment of lung edema classification[13]

Consolidation
Score	Extent of alveolar opacities in each lung quadrant.
0	0%
1	0-25%
2	25-50%
3	50-75%
4	> 75%
If consolidation is ≥ 1, then score density
1	Hazy
2	Moderate
3	Dense
Final RALE scoring
Right lung	Left lung
Upper quadrant, Cons × Density= Q1	Upper quadrant, Cons × Density= Q3
Lower quadrant, Cons × Density= Q2	Lower quadrant, Cons × Density= Q4
Total RALE: Q1+Q2+Q3+Q4

RALE: Radiological assessment of lung edema.

Table 2 Brixia score

Score	Findings on CXR in three divided zones of each lung
0	No abnormal findings
1	Interstitial infiltrates
2	Interstitial > Alveolar infiltrates
3	Alveolar > Interstitial infiltrates

CXR: Chest X-ray.

Table 3 Coronavirus disease 2019 reporting and data system classification.

Category	Level of COVID-19 suspicion	Findings
0	Non-interpretable	Technically insufficient scan to assign a score
1	Very low	Normal lung
2	Low	Typical of infection other than COVID-19
3	Equivalent/unsure	Non-specific findings to COVID-19 and other infections
4	High	Suspicious of COVID-19
5	Very high	Typical COVID-19 findings
6	Proven	Positive RT-PCR for COVID-19

COVID-19: Coronavirus disease 2019; RT-PCR: Reverse transcriptase- polymerase chain reaction.

Table 4 Multilobular infiltration, hypo-lymphocytosis, bacterial coinfection, smoking history, hypertension, and age scoring system

Parameter	Yes	No
Multi-lobar involvement	+ 5	0
Lymphopenia (≤ 0.8 ×109/L)	+ 4	0
Bacterial co-infection in blood or sputum	+ 4	0
Smoking history	Active smoker: + 3; Prior Smoker: + 2	0
Hypertension	+ 2	0
Age ≥ 60 yr	+ 2	0