ROC analysis showed the sub curve area of the combined standard was biggest, followed by the morphologic one and curve type one in sequence, with the Az values 0. 967, 0. 963 and 0. 908, respectively.

• 三种判定标准的评定结果经ROC曲线分析，采用结合形态学及动态增强时间一信号强度曲线标准AZ值最大，其次分别是形态学标准，动态增强时间一信号强度曲线标准，其AZ值分别是0.；967。 0