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20世纪 90年代以前对活体人脑功能的研究主要是用正电子发射体层成像 (positronemissiontomography ,PET)和单光子发射体层成像 (singlephotonemissioncomputedtomography ,SPECT)。随着磁共振技术的
Prior to the 1990s, studies on living human brain function mainly used positronemission tomography (PET) and single photon emission computed tomography (SPECT). With the magnetic resonance technology