الفهرس 
Anatomy of the LungOnly 14 pages are availabe for public view
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Abstract
This observational study involved 50 patients 29 males and 21 females. 38 are pathologically confirmed COVID-19 infection and 12 patients were confirmed other types of chest infections, clinical history was taken from patients non-contrast HRCT chest was performed for all cases; in addition, CT findings and CORADS system were then assessed using descriptive analysis, and the correlation between the CT findings and clinical findings and out comes was assessed. High resolution CT played a vital role in the early identification of Egyptian patients with COVID-19 pneumonia and differentiation of COVID 19 from other types of chest infections. The assessment of the CORADS is essential for proving the presence of typical COVID 19 CT findings and help clinicians to achieve the purpose of early diagnosis and accurate treatment. The most presenting symptoms were cough in 37 patient (97.4%) of COVID 19 and 11 patients in non COVID followed by fever in 21 patients of COVID and 7(58.3%) of non COVID, then dyspnea in 42.1% of COVID patients and 58.3% of non COVID. Also anosmia, and diarrhea seen only in some patients with COVID and not seen in non COVID with diarrhea the least in COVID. Malaise and sore throat seen more common with COVID patients than non COVID with sore throat, malaise the least in non COVID. The most lab finding presented were lymphopenia and PCR positive in COVID. The ground-glass densities with or without consolodations and increases the vascularity were the most typical CT findings. Lymphadenopathy, pure consolodation, atelectatic bands, reversed halo signs and crazy paving are less common CT findings. Pleural effusion was least CT finding presented in our study in COVID patients while pure consolodations were the most common typical CT finding seen in non covid patients also tree in bud, cavitations, calcifications and bilateral pleural effeusion are more specific to non COVID. According to disease distribution both right and left lower lobes are more commonly affected in COVID 19 patients with peripheral distribution in contrary to non COVID where unilobar central distribution were more common.
CORADS system help radiologists grading typical CT finding and making decision of presence of COVID or other types of chest infection.