Fig. 8
From: Pictorial review of the pulmonary vasculature: from arteries to veins
Pulmonary artery narrowing/obstruction. a Axial contrast-enhanced CT image shows a large, irregularly shaped filling defect within the left pulmonary artery (arrow) with extension into the mediastinal fat (arrowhead) causing intrinsic narrowing/obstruction of the pulmonary artery in a patient with biopsy proven angiosarcoma. b Coronal CT image demonstrating severe narrowing of the right upper lobe pulmonary artery (arrow) secondary to extrinsic mass effect from a right upper lobe primary lung malignancy. c Coronal CT image demonstrating complete occlusion of the right upper lobe pulmonary artery (arrow) secondary to extrinsic compression from biopsy proven fibrosing mediastinitis. Note the coarse calcifications present within the region of fibrosis (arrowheads)