title: The Philadelphia Pulmonary Neoplasm Research Project. Early roentgenographic appearance of bronchogenic carcinoma.
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000453:epidemiology; D002283:Carcinoma, Bronchogenic / Q000000981:diagnostic imaging* / Q000453:epidemiology; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging* / Q000453:epidemiology; D005471:Fluoroscopy; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging* / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D010414:Pennsylvania; D010781:Photography; D011446:Prospective Studies; D013997:Time Factors