Definition: Unstable isotopes of tin that decay or disintegrate emitting radiation. Sn atoms with atomic weights 108-111, 113, 120-121, 123 and 125-128 are tin radioisotopes.
Sn-108-111, 113, 120-121, 123, 125-128; /blood-csf-urine /metab permitted but not for tracer studies (