CTICasesPulmonary Embolism with Westermark and Fleischner Signs
Imaging findings
Comparison of pulmonary vessel caliber shows smaller vessels in the upper lobes, increased translucency (transradiancy) in affected areas, a distended azygos vein, and a significantly distended interlobar pulmonary artery.
Key takeaways
Traditional signs include the Westermark sign (peripheral oligemia/transradiancy) and the Fleischner sign (dilated hilar pulmonary artery). The study emphasizes the importance of historical descriptions, such as those by Westermark (1938) and Fleischner (1959).
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