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.

• 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。