DWI was done with single shot SE EPI sequence,b=0s/mm2,400s/mm2,600s/mm2,800 s/mm2,1000s/mm2.Regard the upper bound of 95% confidence interval of ADC value as standard to diagnose benign and malignant,results were compared with pathology.

• 所有病例采用单次激发自旋回波-回波平面成像(SE-EPI)序列行DWI,扩散敏感系数(b值)取0、400、600、800、1000s/mm2。 以恶性病变ADC值95%25可信区间的上界作为诊断病变良、恶性的界值,所得结果与病理结果比较。