CT acquisition technique
Radiological assessment of patients included unenhanced Chest CT imaging with covid-dedicated scanning protocols in two scanners (128-MDCT Siemens Somatom Definition; 16-MDCT Toshiba Alexion): supine, end-inspiration acquisition; slice thickness, 1.0-1.5 mm; tube voltage, 120 kV; tube current, 200-300 mAs; multiplanary reconstructions with mediastinal and lung parenchymal window settings.