The abnormal rate examined by MRI was 87%. The focus,which usually locates on the side of ventriculus cerebri,callus,and brain stem,were mainly reflected with the weighed signals of T2.The total abnormality rate of BAEP and MRI reached 93%.

• MRI检出异常率为 87%25 ,显示病灶以T2 加权高信号为多 ,病灶主要出现在大脑脑室旁、胼胝体、脑干等处。 BAEP与MRI二者联合检查阳性率为 93%25。