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. 2022 Jan 16;127(2):162–173. doi: 10.1007/s11547-021-01444-7

Fig. 1.

Fig. 1

CT scans showing vascular enlargement pattern (VEP) and vascular tree-in-bud (TIB) in two patients with COVID-19 pneumonia. Notes: A—Bilateral peripheral areas of ground-glass opacification and crazy paving in the upper lobes. Dilated segmental and subsegmental vessels (VEP—arrowheads) are visible inside these areas. B—Targeted image shows striking dilatation of peripheral subpleural vessel in upper left lobe with a branching aspect resembling a budding tree (arrow). Please note that vascular TIB is visible only within the area of ground-glass-opacity in this picture