radiological findings from 101 patients with novel coronavirus disease 2019 (covid-19) in hamadan, west of iran: typical and atypical features

Background and aims: coronavirus disease 2019 (covid-19) has spread widely throughout theworld and become a pandemic disease. in this study, we decided to investigate the chest computedtomography (ct) findings in covid-19 patients in hamadan, west of iran.methods: this cross-sectional study was conducted on 101 patients with confirmed covid-19infection from february to march 2020. demographic, clinical, laboratory, and chest ct findings ofidentified covid-19 patients were assessed.results: the mean age of the patients was 55.21 ± 14.08 years, and 54 (53.47%) of them were male.with regard to clinical manifestations, 82.18%, 72.28% and 54.46% of covid-19 patients had drycough, dyspnea, and fever, respectively. the right lower lobe was the most commonly and severelyinvolved lope (69%), followed by left lower lobe, right middle lobe, and lingual segment; however, theanterior segment of upper lobes showed the least involvement with abnormality in the late course ofthe disease. the most common pattern was ground glass opacity (ggo), but atypical patterns such asround pneumonia, moderate to severe pleural effusion, and segmental lobar consolidation were seenwithout evidence of mediastinal adenopathy, cavitation, or nodular lesion. chest x-ray (cxr) was nota sensitive method as the first-line imaging method because 34.65% of them were normal.conclusion: cxr is not a sensitive method as the first-line imaging method (34.65% normal first cxr),but chest ct is a very sensitive and nonspecific modality for diagnosis of covid-19. the lower lobeand posterior basal segments of the lungs are the most involved sites in most cases. about 12% showedatypical chest ct findings.