双源CT低药量双流法在肺动脉CTA检查中的应用评价

The application evaluation of dual-source CT with low-dose dual-flow protocol in pulmonary artery CTA

目的:比较低药量双流法和常规静脉团注法在双源CT行肺动脉CTA检查中的图像质量。方法:选取本院2019年6月—2021年3月临床考虑为肺动脉栓塞的患者100例,采用随机法将患者分两组,A组(低药量双流法)和B组(静脉团注法)。由2位工作满5年以上医师按随机双盲法对图像质量独立评价。结果:两名医师影像质量评分A组均显著高于B组;A组肺动静脉差值平均值在右肺上叶、右肺下叶、左肺上叶、左肺下叶均显著大于B组;A组上腔静脉CT平均值小于B组,差异均具有统计学意义(P<0.05)。结论:在满足影像诊断要求的前提下,低药量双流法能够使用更低的对比剂药量,获取更佳的肺血管造影图像。

Objective To compare the image quality of low-dose double-flow and conventional venous mass injection in doublesource CT for pulmonary artery CTA examination.Methods 100 patients with pulmonary embolism clinically considered in our hospital from June 2019 to March 2021 were randomly divided into two groups,group A(low dose double flow method)and group B(intravenous mass injection method).The image quality was independently evaluated by 2 physicians with more than 5 years of working experience in a randomized double-blind method.Results The image quality scores of the two doctors in group A were significantly higher than those in group B;The mean value of pulmonary arteriovenous difference in group A was significantly higher than that in group B in right upper lobe,right lower lobe,left upper lobe and left lower lobe;The average CT value of superior vena cava in group A was less than that in group B,and the difference was statistically significant(P<0.05).Conclusion Under the premise of satisfying the diagnostic requirements of imaging,low dose double-flow method can use lower dose of contrast agent to obtain better pulmonary angiography images.