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Fig. 1. —39-year-old woman with hepatoma and shortness of breath.
Axial CT angiogram shows small filling defect (arrow) in posterior
segmental pulmonary artery branch of right upper lobe. Interpretation by
fellow was negative for pulmonary embolus, and interpretation of attending
radiologist was small pulmonary embolus in posterior segmental pulmonary
artery branch of right upper lobe. Study radiologists agreed with
interpretation of attending radiologist. Evaluation of images was limited by
presence of streak artifact (arising from dense IV contrast material in
superior vena cava) crossing truncus anterior, but filling defect was clearly
evident in posterior segmental branch.
