优化对比剂注射方案联合低剂量扫描模式在主动脉与下肢动脉CTA联合成像中的应用研究

Application of Optimized Contrast Injection Scheme and Low Dose Scanning Mode in Combined Imaging of Aorta and Lower Limb Artery CTA

目的 探讨优化对比剂注射方案联合低剂量扫描,在主动脉和下肢动脉共同显影中的应用优势。方法 将50例同时行全程主动脉和下肢动脉CT血管造影(CTA)的患者,随机分为A组(常规方案)、B组(优化方案),每组各25例,然后对图像进行综合评价,数据采用SPSS 22.0软件进行统计学分析。结果 两组患者的年龄、性别、体重指数(BMI)差异无统计学意义(P>0.05)。两组患者胸主动脉图像质量评分差异有统计学意义(P<0.05),两组下肢动脉图像质量评分差异无统计学意义(P>0.05)。A组方案的主动脉根部、升主动脉、主动脉弓、降主动脉的平均CT值低于B组。B组的图像质量总体高于A组,B组方案很好地弥补了A组存在的不足,而且人均对比剂使用剂量明显较A组减少。结论 本研究设计的对比剂优化方案在全程主动脉和下肢动脉联合CTA中,图像质量更好,对比剂使用剂量更低,具有显著优势,值得临床推广应用。

Objective To explore the application advantages of optimized contrast injection scheme combined with lowdose scanning in co-imaging of aorta and lower limb arteries.Methods A total of 50 patients in our hospital who had complete aorta and lower limb arteries at the same time were randomly divided into two groups,A(conventional program)and B(optimized program),with 25 cases in each group.Arterial angiography was performed,and then the images were comprehensively evaluated.Data were statistically analyzed by SPSS 22.0 software.Results There was no significant difference in age,sex and body mass index between the two groups(P>0.05).There was statistical significance in thoracic aorta image quality score between the two groups(P<0.05),but no statistical significance in lower limb artery image quality score between the two groups(P>0.05).The mean CT values of aortic root,ascending aorta,aortic arch and descending aorta in group A were lower than those in group B.The image quality of group B was generally higher than that of group A,and the scheme of group B made up for the shortcomings of group A,and the per capita dose of contrast agent was significantly reduced than that of group A.Conclusion The optimized scheme of contrast agent designed in this study has better image quality and lower dose of contrast agent in the combined imaging of the whole aorta and lower limb arteries,which has significant advantages and is worthy of clinical application.