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EJNMMI Physics
Figure 3 | EJNMMI Physics

Figure 3

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

Figure 3

Blank tube CPM data were measured with a high-activity 18F source nearby. The high-activity source was also counted and corresponding data are plotted. Multiple measurements were made as the source decayed from its initial activity of 440 kBq. All data were background-corrected which accounts for the negative points among the blank tube CPM data.

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