文档介绍：肝炎肝硬化螺旋CT门静脉造影扫描延迟时间的合理选择
作者:李毅红,魏经国,王耀程,梁国民,孙巧黎,宋立军,潘爱国
【关键词】肝硬化
关键词: 肝硬化;螺旋CT;门静脉造影术;扫描延迟时间
摘要:目的应用时间―密度曲线选择正常人和肝炎肝硬化患者螺旋CT门静脉造影的合理扫描延迟时间. 方法 ・kg-1 ,注射速率3mL・s-1 ,经外周静脉注射造影剂后15s开始扫描,以后每隔5s扫描1次,、肝脏的CT值,并计算各点门静脉与肝脏的密度差(P-L),描绘时间-密度曲线. 结果正常组与肝硬化组门静脉平均强化峰值分别为(181±34)Hu,(159±29)Hu(P<),峰值到达时间分别为(54±7)s,(65±9)s(P<).肝脏平均强化峰值分别为(118±19)Hu,(96±13)Hu(P<),峰值到达时间分别为(64±9)s,(75±10)s(P<).门静脉和肝脏密度差最大值两组分别为(90±28)Hu,(73±16)Hu(P<),其达到最大密度差时间分别为(50±7)s,(65±3)s(P<). 结论行肝脏螺旋CT门静脉造影成像显示肝内门静脉分支,・kg-1 ,注射速率为3mL・s-1 ,正常人最佳扫描延迟时间为40s,肝炎后肝硬化患者最佳扫描延迟时间为50s.
Keywords:liver cirrhosis;spiral CT;portography;scan de-lay time
Abstract:AIM To optimize the scan delay time for spiral CT portography(SCTP)by using time-density curves in nor-mal individuals and posthepatitic cirrhosis ┐ODS 20normal individuals and18patients with posthep-atitic cirrhosis were involved in this -level dy-namic CT scanning was performed at the level of the first hilus,the contrast dose ・kg-1 ,and injection speed was3mL・s-1 ,starting scan from15s to120s at5s values of the portal vein and liver were calcu-lated at identical slice and the time-density curves was Average maximal value of the portal vein in the normal group and the cirrhotic group were(181±34)Hu,(159±29)Hu(P<).The time of peak enhance-ment were(54±7)s and(65±9)s,respectively(P<).The same measurements of hepatic parenchyma in two groups were(118±19)Hu and(96±13)Hu(P<),and the peak time were(64±9)s and(75±10)s,re-spectively(P<).The maximal density differences be-tween the portal vein and liver parenchyma(P-L)in the two groups were90
±28Hu and73±16Hu,respectively(P<),and it was observed at(50±7)s and(65±3)s,re-spectively(P<).CONCLUSION In SCTP,the opti-mal contrast dose