title: Dry aerosol delivery system compared with ultrasonic nebulizer.
mesh_terms: D000336:Aerosols; D008168:Lung / Q000000981:diagnostic imaging; D011877:Radionuclide Imaging; D013667:Technetium / Q000008:administration & dosage*; D014465:Ultrasonics
chemical_list: D000336:Aerosols; D013667:Technetium