| Direct vascular signs |
| Eccentric wall-adherent filling defect(s), which may calcify; different from the central filling defects within a distended lumen, which are the hallmark of acute PE |
| Abrupt tapering and truncation |
| Complete occlusion and pouch defects |
| Intimal irregularity |
| Linear intraluminal filling defects (intravascular webs and bands) |
| Stenosis and post-stenotic dilatation |
| Vascular tortuosity |
| Indirect vascular signs |
| Significant RV hypertrophy, RA dilatation |
| Pericardial effusion |
| Dilatation of pulmonary artery (>29 mm in men and >27 mm in women) and/or calcifications of pulmonary artery |
| Systemic collateral arterial supply (bronchial arterial collaterals towards pulmonary post-obstructive vessels) |
| Parenchymal changes |
| Mosaic attenuation of the lung parenchyma resulting in geographical variation in perfusion |
