Great majority pathological changes all contain clear boundary,on T_1WI they had low-intermediate signal intensity,on T_2WI they were high or mixed signal,reporting after strengthenning peripheral and asymmetries enhance.

• 绝大多数病变均有清晰的边界,T1WI呈低或等信号,T2WI高或混杂信号,增强后呈周边及不均匀强化。