10 cases were performed conventional contrast enhanced scanning, the other 10 cases were performed FTB technique scanning.

• 分成 2组 ,对照组 1 0例按常规方法进行增强扫描 ,实验组 1 0例增强扫描前采用FTB技术 ,监测出主动脉及心脏内造影剂浓度从无到有的变化过程图后 ,再接着进行增强扫描。