title: Absence of the air bronchogram sign. A reliable finding in pulmonary embolism with infarction or hemorrhage.
mesh_terms: D000328:Adult; D000368:Aged; D001995:Bronchography; D005260:Female; D006470:Hemorrhage / Q000150:complications; D006801:Humans; D007238:Infarction / Q000150:complications; D008168:Lung / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011655:Pulmonary Embolism / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D011877:Radionuclide Imaging