Luc De Nil, of the University of Toronto, has been poring over stutterers' brains using positron emission tomography and functional magnetic resonance imaging.

多伦多大学的卢克∙德∙尼尔已经用正电子发射断层扫描和功能性磁共振成像仔细研究了口吃者的大脑。

So this is a kind of brain scan called positron emission tomography or PET. It looks at brain energy levels.

所以这是一种称为正电子发射断层扫描或 PET 的脑部扫描。它着眼于大脑能量水平。