title: Radionuclide angiography: superior vena caval obstruction.
mesh_terms: D000368:Aged; D018288:Carcinoma, Small Cell / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D013667:Technetium; D014683:Vena Cava, Superior / Q000000981:diagnostic imaging*
chemical_list: D013667:Technetium; D013670:Sodium Pertechnetate Tc 99m