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Comment by joelthelion

5 days ago

PET doesn't use antimatter, at least it doesn't use it directly. It uses regular radioactive tracers.

PET stands for Positron Emission Tomography. The radioactive tracers emit positrons (antimatter), which then annihilate with electrons to produce the gamma rays that are detected. So it does use antimatter, just indirectly through the decay process.

  • I am familiar with PET. As we both agree, PET does not use antimatter directly, so this article is irrelevant to it (which is what the original comment was asking about).