title: Musings on PET and SPECT.
mesh_terms: D002250:Carbon Radioisotopes; D005069:Evaluation Studies as Topic; D006207:Half-Life; D006321:Heart / Q000000981:diagnostic imaging / Q000502:physiology; D006331:Heart Diseases / Q000175:diagnosis; D006801:Humans; D009590:Nitrogen Radioisotopes; D010104:Oxygen Radioisotopes; D011827:Radiation; D014055:Tomography, Emission-Computed
chemical_list: D002250:Carbon Radioisotopes; D009590:Nitrogen Radioisotopes; D010104:Oxygen Radioisotopes