数字减影血管造影低剂量技术在儿童介入诊疗中的应用

Low-dose technology in the diagnosis and treatment of children interventional applications

目的:通过对儿童心血管介入诊疗中X射线辐射剂量的统计与分析,探讨数字减影血管造影(DSA)低剂量技术在儿童辐射防护中的应用。方法:回顾性分析收治的18岁以下300例患者,3种常见的儿童介入操作的近两年的患者辐射水平与两年前相同操作患者辐射水平的技术分析。其中,房间隔缺损封堵术患者60例,室间隔缺损封堵术患者90例,动脉导管未闭封堵术患者150例。采用DSA机自动调节曝光条件,对入射有效剂量(ED)、剂量面积乘积(DAP)以及透视时间(F)进行测定。结果:两组结果在透视时间、入射ED存在显著性差异。近两年的统计数据显示患儿所受到的辐射剂量明显减少,入射ED与透视时间两者之间存在显著线性关系。不同心血管介入操作的DAP存在显著性差异,室间隔缺损封堵术的DAP仍较大。结论:低剂量技术有效减少了儿童辐射剂量,值得推广。

Objective：Cardiovascular interventional therapy for children Statistics and Analysis of X-ray radiation dose to explore low-dose technology in the protection of children. Methods：The hospital nearly two years the use of low-dose technology in the interventional diagnosis and treatment of children, a retrospective analysis of 18 patients under the age of three kinds of treated me institutes common childhood intervention operations radiation levels were nearly two years and two years ago the same operation of the radiation levels in patients with technical analysis, a total of 300 cases. Among them, 60 cases of atrial septal defect occlusion in patients with ventricular septal defect occlusion in patients with 90 cases, patent ductus arteriosus occlusion in patients with 150 cases. Using digital subtraction angiography machine automatically adjusts the exposure conditions. Including entrance dose ED（mGy）, dose area product DAP and fluoroscopy time F were measured. Results：The two groups results in the perspective of time, entrance dose, there was a significant difference, nearly 2 years statistics show a significant reduction in radiation dose in children suffered, both between entrance dose and fluoroscopy time was significantly a linear relationship. Area of operation of different doses of the product of cardiovascular intervention there was a significant difference, ventricular septal defect occlusion area dose product is still large. Conclusion：Low-dose technology effectively reduces the radiation dose for children, worthy of promotion.