| 单词 | positron emission tomography scanner |
| 释义 | positron /pozˈi-tron/ (physics)noun
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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