The detectability of two system for contrast and detail was analysed using ANOVA. A ROC analysis was performed with TRG phantom in different exposure settings.

• 使用X射线摄影统计学体模(TRG)测量两系统在不同曝光剂量条件下操作者特性曲线(receive operating characteristics,ROC),应用Wilcoxon检验分析、比较两种成像技术的影像信息检测能力的差别。