Fig. 5From: Comments on the NEMA NU 4-2008 Standard on Performance Measurement of Small Animal Positron Emission TomographsComparison of different methods for the determination of random event rates. NEMA means a method based on the NEMA standard using Eq. 1, DCW uses a delayed coincidence window, SR is based on the singles rate using Eq. 4, and SP incorporates additional corrections using Eq. 5Back to article page