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不同碘离子浓度对比剂对主动脉强化的影响 被引量:3

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摘要 目的:评价不同碘离子浓度对比剂对主动脉强化的影响,以指导螺旋CT血管成像中对比剂的合理使用。方法:20位无心血管疾病的男性志愿者随机分成4组,每组5人,分别从肘前静脉注射不同碘离子浓度的对比剂,1A组:对比剂浓度300mgI/ml,容量90ml。注.射速率3ml/s;1B组:对比剂浓度370mgI/ml,容量73ml,注射速率3ml/s;2A组:对比剂浓度300mgI/ml,容量90ml。注射速率5ml/s;2B组:对比剂浓度370mgI/ml,容量73ml。注射速率5ml/s。在肝门水平同层动态扫描,测量腹主动脉的密度变化,绘制主动脉强化的时间-密度曲线,计算各组主动脉强化峰值和达峰时间,使用SPSS软件进行统计学分析(T检验)。结果:1A组主动脉强化峰值为250±22.1Hu。达峰时间为32±2.8sec,1B组主动脉强化峰值为207±18.7Hu,达峰时间为27±1.8sec;2A组主动脉强化峰值为395±13.6Hu,达峰时间为28±2.8sec;2B组主动脉强化峰值为303±24.7Hu,达峰时间为22±2.2see。当注射速率分别为3ml/s和5ml/s时,A和B组组内主动脉强化峰值经T检验。t值分别为3.12和6.67,P值分别为0.014和0.0002,均有显著统计学意义;A和B组组内主动脉强化达峰时间经T检验,t值分别为3.21和4.00,P值分别为0.012和0.0039,也均有显著统计学意义。结论:在给碘量和注射速率一定的情况下,使用高浓度对比剂时主动脉强化峰值并不比低浓度对比剂高;加快对比剂注射速率,有助于提高主动脉强化峰值。
出处 《医用放射技术杂志》 2007年第5期2-4,共3页 Journal of Medical Radiology Technology
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