Antimatter annihilates whenever it encounters matter and causes an explosion that emits gamma rays.

Hospital PET scans, one of the most common applications of antimatter, use positrons, which are a subatomic, antimatter particles.

Positron Emission Tomography (PET) is the process used to inject positrons into a brain and watch for gamma rays that flash when the positrons encounter electrons of normal matter and then explode. The two destroy each other, giving off a light pattern that is different in an afflicted brain than in a normal one, thus revealing neurological aberrations.

Antimatter is used almost daily in hospitals around the world.

 

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Technology Beyond Belief

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