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11 August, 16:43

What is the product of a positron and electron combining then undergoing annihilation during the pet imaging process? a. two 511 kev photons are formed. b. x-rays are formed. c. a single gamma ray is formed. d. two high-speed beta particles are formed?

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  1. 11 August, 17:08
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    Answer is: a. two 511 kEv photons are formed.

    When the positrons reach thermal energies, they start to interact with electrons by annihilation.

    Positron-emission tomography (PET) is a nuclear medicine functional imaging technique that is used to observe metabolic processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron - emitting radionuclide.
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