Fig. 3

Axial (a, c) and coronal (b, d) CT slices of the lung window in different cases with COVID-19 pneumonia (a, b) showing the “crazy-paving sign” shown as bilateral ground-glass density with prominent interlobular and intralobular septations. c, d The bilateral parenchymal bands (black arrows), inter- and intralobular septations (blue arrows), and subpleural bands (white arrows), forming the spiderweb sign