摘要
目的 :探讨肝脏CT灌注成像的可行性。材料和方法 :5只小型猪 ,分别以 2 5ml/s× 5s ,2 5ml/s× 10s的方式静脉团注 60 %泛影葡胺 ,1张 /s的速度 ,电影方式连续扫描 60s ,通过增强曲线分析肝脏实质、腹主动脉和门静脉的到达峰值时间 (PTT)、上升段斜率和增强峰值。结果 :腹主动脉的PTT、上升段斜率和增强峰值 ,门静脉的增强峰值和PTT ,肝实质的PTT在两种注药方式之间均有显著性差异 ;门静脉和肝实质的上升段斜率 ,肝实质的增强峰值在两种注药方式之间无显著性差异。结论 :肝脏实质和门静脉的上升段斜率是相对稳定的参数 。
Purpose: To study the feasibility of hepatic perfusion by CT scanning. Materials and Methods: 5 pigs were injected into vein using 60% meglumine diatrizoate at the speed of 2.5ml/s×5s, 2.5ml/s×10s respectively, then overall 60s continuous CT scan were performed in the CINE mode at the rate of 1 image per second. The PTTs (time to peak), slopes of increasing segments and maximum values of hepatic. parenchyma, aorta, and portal vein were analyzed on their enhancement curves. Results: The PTT, slopes of increasing segment and maximum values of aorta, the PTT and maximum value of portal vein, the PTT of hepatic parenchyma had obvious differences betwween the two injection modes. The slopes of incerasing segment of portal vein and hepatic parenchyma, the maximmum value of hepatic parenchyma had no significant difference. Conclusion: The slopes of increasing segment of portal vein and hepatic parenchyma are the relatively constant and they are the imoportant indexes in the hepatic CT perfusion analysis.
出处
《中国医学影像学杂志》
CSCD
2002年第1期41-42,共2页
Chinese Journal of Medical Imaging
