Fig. 1

Low-dose chest CT scan images in 5 different patients with RT-PCR-confirmed COVID-19 pneumonia, showing a variety of diseased lung extension and density, comparable with the standard-dose CT scan. a Peripheral area of ground-glass opacity (thick short arrow) with overlying pleural thickening (thin long arrow). b Mixed central-peripheral lesion of ground-glass opacity (thick short arrow) with a prominent intralesional vessel (thin long arrow). c Peripheral area of ground-glass opacity (black arrows) with prominent intralesional vessels. d Peripheral area of crazy paving pattern (black arrows) with thickened interlobular septa within (blue arrow). e Mixed ground-glass opacity (arrowhead) and consolidation (thick black arrow). Long thin arrows point out air-bronchogram [images are from first author’s institution, implementing low-dose CT scan protocol, with scanning parameters as follows: kVp 120, mAs 50, pitch factor 1, thickness 3 mm]