» Sodium Iodide I 123 Solution is a solution, suitable for oral or for intravenous administration, containing radioactive iodine (¹²³I) processed in the form of Sodium Iodide, obtained from the bombardment of enriched tellurium 124 with protons or of enriched tellurium 122 with deuterons, or by proton irradiation of enriched xenon 124, or by the decay of xenon 123 in such manner that it is carrier-free.