Fluorine-18 is a radioactive isotope of fluorine, which is a chemical element with the symbol F and atomic number 9. Fluorine-18 has a mass number of 18, indicating it has 9 protons and 9 neutrons in its nucleus. This isotope is notable for its applications in positron emission tomography (PET), a medical imaging technique. Fluorine-18 is produced in a cyclotron through the irradiation of oxygen-18.
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