摘要
目的 检测金属内支架是否对放射治疗有影响。方法 采用192 Ir作为放射源 ,在体外采用平行板电离室对国产镍钛合金自膨式食管支架、国产不锈钢自膨式胆管支架和不锈钢球囊扩张型血管支架的透射因子进行测定 ,以确定 3种金属支架对射线的衰减情况。结果 研究结果提示 ,该3种金属支架对射线的透射因子 (衰减系数 )分别为 :0 993,0 988,0 997,即对射线的衰减分别为 :0 7% ,1 2 % ,0 3%。结论 3种金属支架对射线的衰减均不超过 1 2 % 。
Objective To confirm whether the metal stents affect the radiation beam. Methods The transmission factors from the Nitinol self expanding esophagus stent, stainless self expanding bile duct stent, and balloon expanded vascular stent was supervised under 192 Ir irradiation in the air. Results The transmission factors from the 3 kinds of metal stents were 0.993, 0.988, and 0.997, which meant that the attenuation of the stents to the radiation was 0.7%, 1.2%, and 0.3%, respectively (mean: 0.7%). Conclusion The effect of the metal stents to the radiation was less than 1.2% and that meant there was no clinical significant effect on the patients irradiated following stent implantation or to perform the intra stents brachytherapy.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2001年第1期75-76,共2页
Chinese Journal of Radiology
基金
北京市自然科学基金!(7982 0 35 )
