title: Carbon-11, nitrogen-13 and oxygen-15--labelled molecules.
mesh_terms: D002250:Carbon Radioisotopes; D006801:Humans; D009590:Nitrogen Radioisotopes; D010104:Oxygen Radioisotopes; D011854:Radiochemistry; D014055:Tomography, Emission-Computed
chemical_list: D002250:Carbon Radioisotopes; D009590:Nitrogen Radioisotopes; D010104:Oxygen Radioisotopes