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EJNMMI Physics

Table 1 Experimental measurements of gamma counter efficiency (mean ± SD) for 18 F and 68 Ge/ 68 Ga

From: Performance assessment of a NaI(Tl) gamma counter for PET applications with methods for improved quantitative accuracy and greater standardization

Isotope

Efficiency (%)

Positron fraction

Efficiency (%)/positron fraction

18F

34.4 ± 0.18

0.97

35.5 ± 0.18

68Ge/68Ga

30.1 ± 0.07

0.89

33.8 ± 0.07

  1. Both isotopes were measured using a 409- to 613-keV energy window.
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