What is the product of a positron and electron combining then undergoing annihilation during the pet imaging process? a. two 511

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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?

Chemistry

1 answer:

jekas [21] · Answer 1 · 2022-01-12T16:12:52+03:00

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.