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.
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)
