The Absolute Standardization Methods of 32P for Calibrate Nuclear Medicine Instruments in Indonesia

G. Wurdiyanto (Center for Radiation Safety Technology and Metrology, National Nuclear Energy Agency, Jl. Lebak Bulus Raya, No. 49, Jakarta 12440, Indonesia)
H. Candra (Center for Radiation Safety Technology and Metrology, National Nuclear Energy Agency, Jl. Lebak Bulus Raya, No. 49, Jakarta 12440, Indonesia)
H Holnisar (Center for Radiation Safety Technology and Metrology, National Nuclear Energy Agency, Jl. Lebak Bulus Raya, No. 49, Jakarta 12440, Indonesia)
V. Pungkun (Office of Atoms For Peace, 16 Vibhavadi-Rangsit Rd., Chatuchak, Bangkok 10900, Thailand)

Atom Indonesia Journal
Vol 45, No 3 (2019): December 2019

The absolute standardization of 32P radioactive sources employedto calibrate nuclear medicine instruments has been conductedat PTKMR-BATAN. We deemed this activity to be necessarysince 32P used in the nuclear medicine fields has a short half-life, and in order to obtain a result of quality measurement, it requires a special treatment. Moreover, in Indonesia, the use of nuclear medicine techniques has developed rapidly. We prepared all the radioactive sources witha gravimetric method by using a KERN ABT 220-5DMsemi-micro type scale, traceable to the International Unit System. We conductedthe 32P standardization by employing a 4πβ(PS)-γ coincidence method with 60Co as a tracer;meanwhile, we conducted the impurity measurementby employing a beta spectrometer system. The result of 32P absolute measurement was 380.05 Bq/mg with a 0.68-percentrange uncertainty, witha k=2coverage factor. This value was used to calibrate a “Capintec CRC-7BT”dose calibrator that was a secondary standard instrument in PTKMR-BATAN. The results showed us that the calibration factor of the “Capintec CRC-7BT” dose calibrator was 1.12 witha 4.7-percent uncertainty.