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24.3 PET scanning

24.3.1—A tracer is a substance containing radioactive nuclei that can be introduced

24.3.2—That a tracer that decays by β+ decay is used in positron emission

24.3.3—Annihilation occurs when a particle interacts with its antiparticle and that

24.3.4—That, in PET scanning, positrons emitted by the decay of the tracer

24.3.5—The energy of the gamma-ray photons emitted during the annihilation of an

24.3.6—The gamma-ray photons from an annihilation event travel outside the body and

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24.3 PET scanning