摘要
目的 探讨CT增强中对比剂的最少使用量 ,且能保证高质量图像的方案。方法 对 5例肝门动态扫描CT增强图像有关靶部位的CT值逐层测量 ,从而得到相应的“CT值 时间曲线” ,最终找出有效增强周期。结果 根据经验确定主动脉、门静脉及肝实质的增强阈值为 70HU ,并找到增强阈值达到和结束的时间。结论 使用新型螺旋CT进行增强扫描 ,可以减少对比剂的使用量 ,且注射速率、延迟时间等有关参数也应根据具体情况确定。
Objective To investigate a method that perfect imaging could be obtained and minimal contrast media was used. Methods The 5 cases with enhanced CT images were measured at each slice, then the Hu of aim position was obtained and the Hu time curve was got. At last, the valid enhanced period would be found. Results According to the experience, the enhancement threshold of aorta, portal vein and hepar were set at 70 HU. The onset and ending time of enhancement threshold were found. Conclusion The dose of contrast media should be extenuatory when new type spiral CT was operated, and the correlative parameters, such as flow rate, delay time etc. should be adjusted according to the objective condition. [
出处
《中国医学影像技术》
CSCD
2001年第5期483-485,共3页
Chinese Journal of Medical Imaging Technology
关键词
CT增强
对比剂
注射量
Enhanced CT scanning
Contrast media
Volume
