Functional magnetic resonance imaging (fMRI) have been widely used to lbrain check,especially diffusion weighted imaging(DWI)and diffusion perfusion weighted imaging(PWI).

• 功能磁共振成像已比较广泛地用于颅脑检查,尤以磁共振弥散加权像(DWI)和灌注加权像(PWI)应用较多。