title: New technique for roentgenographic study of airways and lungs using powdered tantalum.
mesh_terms: D000402:Airway Obstruction / Q000000981:diagnostic imaging*; D001285:Atropine / Q000627:therapeutic use; D003287:Contrast Media; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000000981:diagnostic imaging*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D011292:Premedication; D011859:Radiography; D013635:Tantalum; D013679:Technology, Radiologic
chemical_list: D003287:Contrast Media; D013635:Tantalum; D001285:Atropine