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. Author manuscript; available in PMC: 2023 Dec 1.
Published in final edited form as: Proc IEEE Inst Electr Electron Eng. 2019 Sep 19;108(1):51–68. doi: 10.1109/JPROC.2019.2936809

Fig. 1.

Fig. 1.

A PET scanner uses a ring of detectors to detect 511 keV annihilation photons. A coincidence event is formed when a pair of photons are recorded within a predefined coincidence timing window.