title: Some physical problems of lung scanning.
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D006801:Humans; D007457:Iodine Radioisotopes; D008171:Lung Diseases / Q000175:diagnosis*; D011829:Radiation Dosage; D011877:Radionuclide Imaging / Q000295:instrumentation*; D013667:Technetium
chemical_list: D007457:Iodine Radioisotopes; D013667:Technetium