优化对比剂注射方案对冠状动脉CTA图像的影响

发布时间：2018-03-01 03:00

本文关键词： 冠状动脉对比剂注射方法图像质量　出处：《临床放射学杂志》2017年11期 　论文类型：期刊论文

【摘要】：目的探讨冠状动脉CTA时不同对比剂注射方案对图像质量的影响,优化注射方案。方法选取体重指数相似患者320例,分为A、B、C、D四组,进行冠状动脉CTA。A组对比剂采用双相注射方案,先期注射对比剂70 ml,而后注射生理盐水20 ml;B组采用双相注射方案,先期注射对比剂50 ml,而后注射混合液(生理盐水-对比剂1∶1)20 ml,C组采用三相注射方案,先期注射对比剂50 ml,第二时相注射混合液(生理盐水-对比剂1∶1)20 ml,而后无缝隙注射生理盐水20 ml;D组采用双相注射方案,先期注射对比剂50 ml,而后注射混合液(生理盐水-对比剂1∶1)20 ml,扫描时间较常规延迟5 s。比较四组冠状动脉CTA图像中冠状动脉三大分支和升主动脉(AO)CT值之间有无差异,比较四组上腔静脉、右心室硬化伪影发生率及室间隔显示率。结果与A组比较,B、C两组对比剂虽减少10 ml,但三组间AO及冠状动脉三大分支CT值比较无统计学意义(P0.05),而D组CT值较A、B、C三组降低(P0.05);B组上腔静脉、右心室硬化伪影发生率高于A、C、D三组(P0.05),C、D两组室间隔显示率无统计学差异(P0.05),但高于A、B两组(P0.05)。结论采用三时相对比剂注射方案,可以有效降低对比剂用量,保证图像质量,清晰显示室间隔,为冠状动脉疾病的诊断提供影像依据。
[Abstract]:Objective to investigate the effect of different contrast media injection on image quality in coronary artery CTA and optimize the injection protocol. Methods 320 patients with similar body mass index were divided into four groups. The coronary artery CTA.A group was treated with biphasic injection. Group B was treated with biphasic injection, group B with 20 ml saline, and group B with 50 ml of contrast agent, and then with a mixture of saline and contrast agent (1: 1 1: 20 ml / C). First, 50 ml contrast agent was injected, the second phase was injected with mixed solution (1: 1 1: 20 ml of saline), and then the group D was given biphasic injection of 20 ml saline without slit injection. 50 ml contrast agent was injected first, and then mixed solution (1: 1ml contrast agent) was injected. The scanning time was delayed by 5 s. The differences between the three branches of coronary artery and ascending aorta in CTA images of four groups were compared. The superior vena cava was compared among the four groups. Results compared with group A, the incidence of right ventricular sclerosis artifact and the rate of ventricular septal display were decreased by 10 ml, but the CT values of AO and coronary artery branches in group D were not significantly higher than those in group A (P 0.05), but the CT value in group D was higher than that in group A (P < 0.05). The superior vena cava was decreased in group B. The incidence of right ventricular sclerosis artifact was higher than that of the three groups (P 0.05 and P 0.05), but it was higher than that of group A B (P 0.05). Conclusion the dosage of contrast agent can be reduced effectively and the image quality can be ensured by using the three-time contrast agent injection regimen, and the results are as follows: (1) the incidence of right ventricular sclerosis artifact is higher than that of the control group (P 0.05), but it is higher than that of group A B (P 0.05). The clear display of ventricular septum provides imaging basis for the diagnosis of coronary artery disease.
【作者单位】：华北理工大学附属医院CT室;华北理工大学基础医学院病理教研室;
【分类号】：R541.4;R816.2

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