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Table 4 Scatter Fraction, peak NECR, and source activity test results for 18F and 68Ga

From: NEMA NU 2–2007 performance characteristics of GE Signa integrated PET/MR for different PET isotopes

Scan type Unit Measured values
Isotopes   18F 68Ga
Scatter fraction at peak NECR % 43.3 42.9
Peak NECR kcps 216.8 205.6
Activity at peak NECR kBq/ml 18.60 20.40
Maximum absolute error % 3.0 6.0