Unenhanced chest CT is indicated for patients with suspected COVID-19 presenting with dyspnea, polypnea or arterial blood oxygen desaturation.
Most typical CT features of COVID-19 pneumonia include bilateral and multifocal ground-glass opacities predominating in the peripheral, posterior and basal parts of the lungs.
Between 15 and 30% of hospitalized patients with COVID-19 progress to acute respiratory distress syndrome, which is the main cause of mortality.
The current COVID-19 pandemic has highlighted the essential role of chest computed tomography (CT) examination in patient triage in the emergency departments, allowing them to be referred to “COVID” or “non-COVID” wards. Initial chest CT examination must be performed without intravenous administration of iodinated contrast material, but contrast material administration is required when pulmonary embolism is suspected, which seems to be frequent in severe forms of the disease. Typical CT features consist of bilateral ground-glass opacities with peripheral, posterior and basal predominance. Lung disease extent on CT correlates with clinical severity. Artificial intelligence could assist radiologists for diagnosis and prognosis evaluation.Le texte complet de cet article est disponible en PDF.
Keywords : COVID-19, Tomography, X-ray computed, Severe acute respiratory syndrome coronavirus 2, Pulmonary embolism
Abbreviations : AI, ARDS, COVID-19, CT, RT-PCR, SARS-CoV-2