ADC, rADC, DWI- CNRs and T2WI- CNRs were calculated from the region of ischemia and from the corresponding contralateral brain region .

• 选取病灶中心和健侧相应部位中心5X5像素大小为各自感兴趣区（ROI），计算各自的 ADC值和 rADC，同时分别计算DD及 TZWI上病灶的 CNRS。