[Mechanism of the appearance of pulmonary tram line shadow].
D000230:Adenocarcinoma / Q000000981:diagnostic imaging*; D000368:Aged; D001995:Bronchography; D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged