Basic PET Physics and the PET Camera
Kusai S. Aziz
As mentioned earlier, some radionuclides decay by positron emission; a positively charged electron is emitted from the nucleus, and after travelling a few millimeters it interacts with an electron in an annihilation reaction that leads to the production of two high energy photons (511 MeV) at 180° to each other (Figure 4.1
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