对比剂注射速率对腹部动脉CT成像的影响  

The impact of contrast agent injection rate on abdominal artery imaging

作　　者：马奎元[1] 史志涛[1] 陈月芹[1] 李娴[1] 王皆欢[1] 孙占国[1] 王林省[1] 

机构地区：[1]济宁医学院附属医院,山东济宁272029

出　　处：《济宁医学院学报》2010年第5期326-328,331,共4页Journal of Jining Medical University

基　　金：山东省教育厅立项课题(J08LG54)

摘　　要：目的探讨MSCTA腹部血管成像中对比剂的注射速率对腹部动脉成像的影响。方法 40例受检者采用德国Siemens双源CT扫描仪(Somatom Definition)和Medrad Stellant双筒高压注射器,注射对比剂优维显370(Ultravist,370 mgI/ml),按注射速率3.0 ml/s、5.0 ml/s分A、B两组,各20例,保持每位检查者碘总量一致,即390 mgI/kg体重。双盲式观察,描绘腹主动脉的时间密度曲线,分析强化峰值(Peak Contrast En-hancement)、强化峰值时间(Time To Peak),利用曲线计算腹主动脉强化CT值在200 HU以上的起始时间(Tb200)及持续时间(T200)。结果腹主动脉强化峰值随着注射速率的提高而增高,B组明显高于A组(P<0.05);强化峰值时间B组快于A组(P<0.05);Tb200比较,A组较B组要慢(P<0.05);T200比较,A组较B组要长(P<0.05)。结论在MSCTA腹部血管成像中,在碘总量及对比剂浓度一致时,注射速率为5.0 ml/s较3.0 ml/s有助于提高腹部动脉的成像效果。Objective To study an impact of contrast agent injection rate on abdominal artery imaging with MSCT.Methods 40 examinees were divided into A（3.0ml/s）and B（5.0ml/s）groups equally according to injecting rate,and underwent contrast enhancement examination with spiral CT（Siemens Somatom definition）and injected the contrast agent（Ultravist,370mgI/ml）with twin tube syringe（Medrad Stellant）,keeping iodine all quantity being 390 mgI/kg consistently.The time-density curves were obtained;Peak CT value and Time to Peak of the abdominal aorta contrast enhancement were observed and analyzed using Double-blind method.The enhancement initiation time（CT value above 200HU,Tb200）,duration time（CT value above 200 HU,T200）of the abdominal aorta were calculated with the time-density curves.Results The peak value of group A was lower than that of group B（P0.05）.The time to peak of group B was faster than that of group A（P0.05）.The enhancement initiation time（Tb200）of group A was slower than that of group B（P0.05）.The duration time（T200）of group A was longer than that of group B（P0.05）.Conclusion In the conditions of total iodine and contrast agent concentration,the injection rate can help to improve the effectiveness of abdominal artery imaging.

关 键 词：血管造影 腹主动脉 对比剂 体层摄影 X线计算机 

分 类 号：R445.3[医药卫生—影像医学与核医学]