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正电子发射断层摄影术(positronemissionto mography ,PET)是一种无创性、功能性显像技术,它的显像原理完全不同于CT、MRI等,其基本原理是将正电子标记核素注入人体后,正电子核素在体内衰变过程中会产生一个正电子,这个正电子与体内负电子结合发生湮灭,同时产生一对能量相同(5
Positronemission tomography (PET) is a noninvasive, functional imaging technique. Its imaging principle is completely different from that of CT, MRI, etc. The basic principle is that positron emission tomography Positronium in the body decay process will produce a positron, the positron and the body negative electron annihilation annihilation, at the same time produce a pair of the same energy (5