title: Collimators and counting systems for brain scanning.
mesh_terms: D001932:Brain Neoplasms / Q000175:diagnosis; D005461:Fluorine; D006801:Humans; D007456:Iodine Isotopes; D008629:Mercury Isotopes; D008722:Methods; D011868:Radioisotopes; D011877:Radionuclide Imaging / Q000295:instrumentation*; D013667:Technetium
chemical_list: D007456:Iodine Isotopes; D008629:Mercury Isotopes; D011868:Radioisotopes; D005461:Fluorine; D013667:Technetium