Fig. 10From: Pictorial review of the pulmonary vasculature: from arteries to veinsTwo patients with chronic pulmonary emboli. a Axial contrast-enhanced CT image shows a web-like filling defect within a segmental right lower lobe pulmonary artery consistent with chronic pulmonary embolus (white arrow). b Axial non-contrast CT image of another patient demonstrates linear calcification within the right interlobar pulmonary artery consistent with chronic pulmonary embolus (white arrow)Back to article page