Standardization of Ga-68 by coincidence measurements, liquid scintillation counting and 4πγ counting

68 Ga activity calibrations for nuclear medicine applications in Cuba

“…The 68 Ga counting efficiencies of the logical sum of double coincidences were estimated with a developed FORTRAN code that considers for calculations the 68 Ga simplified decay scheme presented in Fig. 1A, as in Roteta, et al (2012). The code uses the KLM atomic rearrangements model, the Poisson statistics for the photoelectron emissions and it takes into account the photomultipliers' asymmetry for calculations.…”

Results of an international comparison of activity measurements of 68Ge

“…The initial result was submitted by Laboratório Nacional de Metrologia das Radiações Ionizantes, Instituto de Radioproteção e Dosimetria (LNMRI/IRD), a participant in this comparison. Three NMIs had previously reported standardizing this radionuclide (Schönfeld et al, 1994;Grigorescu et al, 2004;Zimmerman et al, 2008), with additional papers having reported standardizing the daughter radionuclide alone (Roteta et al, 2012;Sahagia et al, 2012). In order to provide a means for laboratories to substantiate calibration and measurement capability (CMC) claims for this nuclide, a Key Comparison of 68 Ge was proposed, agreed, and carried out, designated CCRI(II)-K2.Ge-68…”