title: Ventilation/perfusion scintiphotography in pulmonary diseases.
mesh_terms: D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D013667:Technetium; D014692:Ventilation-Perfusion Ratio
chemical_list: D013667:Technetium