COVID-19(23) Pneumonia(11) Chest CT(10) Computed tomography(8) CT(7) SARS-CoV-2(5) ground-glass opacity(5) tomography(4) regression analysis(3) emphysema(3) calculated(3) disease severity(3) early treatment group(3) viral clearance(3) Algorithm(3) coronavirus(3) Quantitative(3) disease onset(3) material(3) performed(3) therapy(3) CT finding(3) Favipiravir(3) scored(3) correlation(3) Viral(3) Analysis(3) Volume(3) study participation(3) determine(3)