Comparison of radioactivity calibrators in the measurements with radionuclide Republic of Korea

摘要

Recognizing the importance of comparisons of radionuclide calibrators in nuclear medicine and the need to provide access to activity standards that are traceable to the international measurement system, the Korea Food & Drug Administration (KFDA) as a national secondary standard dosimetry laboratory (SSDL), started a comparison program in 2002. The first two comparisons were conducted with I-131 (71 participants) and Tc-99m (72 participants). The results indicated that only 61% of reported activities for I-131 and 65% for Tc-99m were within +/- 5% of the correct value. These numbers increased to 84% for I-131 and 83% for Tc-99m when a +/- 10% limit was applied. Follow-up action on those calibrators with results outside the 10% limits only produced a small improvement. There was also a marked difference in performance between the various calibrator types used.The results have shown that such comparisons are necessary to improve the quality of the measurements and to identify those radionuclide calibrators that are not functioning correctly. (c) 2005 Elsevier Ltd. All rights reserved.