title: A clinical basis for the standardization of scanning technique: empirical observations and physical correlation from 300 lung perfusion scans.
mesh_terms: D006801:Humans; D008433:Mathematics; D011656:Pulmonary Emphysema / Q000175:diagnosis*; D011877:Radionuclide Imaging / Q000592:standards*; D013667:Technetium
chemical_list: D013667:Technetium