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单词 PET scanner
释义

positron /pozˈi-tron/ (physics)

noun
  1. (also posˈiton) a particle differing from the electron in having a positive charge
  2. A positive electron

positronium /-trōnˈi-əm/ noun

A positron and an electron bound together as a short-lived unit, similar to a hydrogen atom

positron emission tomography scanner or PET scanner noun

A device that uses gamma rays to monitor brain activity, by following the movement of a radioactive tracer substance injected into the bloodstream

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更新时间:2024/12/23 13:56:58