A 56-year-old man presented to the Accident and Emergency Department with 
pleuritic chest pain of sudden onset. He gave a history of short-distance air 
travel ten days earlier. Chest radiograph showed a peripheral-based opacity in 
the right lower zone, which was not seen in a previous study done three months 
ago, suggestive of Hampton's hump. The D-dimer level was raised. Computed 
tomography pulmonary angiography confirmed the diagnosis of pulmonary embolism 
in a right lower lobe segmental branch, with adjacent collapsed lung, consistent 
with lung infarction. The patient was started on heparin injection with 
significant relief of his symptoms. The clinical and imaging features of 
pulmonary embolism are described, with emphasis on the historical radiographic 
signs and the current dual-energy computed tomography innovations.