And although Asimov's "positronic" brains do not exist, positrons are indeed used to probe human brains in positron-emission tomography (PET) scanning.

虽然阿西莫夫虚构的“正电子”大脑并不存在，但是正电子理论确确实实被应用于正电子衍射成像(PET)扫描技术上用来探索人类大脑。

youdao

In one study in 2004 researchers at the University of Toronto used positron emission tomography scanning to track the brain activity of 14 depressed patients who had successfully been treated with CBT, comparing them with 13 patients who got better by taking only Paxil.

FORBES: On The Cover/Top Stories

Initially, Dr Zeki employed a scanning technique called positron-emission tomography to investigate these regions.

ECONOMIST: The biology of art