title: 99Tcm-"pseudogas". An ultrafine monodisperse aerosol for diagnostic studies in the lung.
mesh_terms: D000336:Aerosols; D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging*; D010316:Particle Size; D011877:Radionuclide Imaging; D013667:Technetium; D014692:Ventilation-Perfusion Ratio
chemical_list: D000336:Aerosols; D013667:Technetium