NCIt synonyms : Lead Pb 207; Lead 207; Pb-207; Pb207; Lead-207;
NCIt definition : A stable isotope of lead (Pb) and the final non-radioactive product of radioactive
decay in the actinium series (uranium-235) or plutonium cascade (plutonium-239), which
both include the daughter radionuclide radium-223 (Ra-223). As Ra-223 is used to treat
metastatic bone disease and Ra-223 decays to the stable isotope Pb-207, the concentration
of Pb-207 found in bone metastases may be used to estimate the amount of Ra-223 that
accumulated in the bone during treatment.;