The traceability chain of 131I measurements for nuclear medicine in Cuba

The national traceability chain for 131I activity measurements performed in nuclear medicine in Cuba is described. At the highest (primary) level, liquid scintillation counting employing the CIEMAT/NIST method is used; at the secondary level, a secondary standard radionuclide calibrator is utilized that allows for a quick and simple transference of the measurement unit to the tertiary level of end-users' instruments. The equivalence of Cuban standards and the assessment of measurement uncertainties at the end-user level are determined through the results of measurement comparisons.

► Three levels′ Cuban traceability chain for 131I measurements in nuclear medicine is described. ► At the highest (primary) level, LSC employing the CIEMAT/NIST method is used. ► At the secondary level, a secondary standard radionuclide calibrator is utilized. ► Unit transfer to the tertiary level of end-users assures same conditions as in routine works. ► Equivalence between Cuban standards and standards of other countries are ascertained.