CAJ | 학술논문

目的　检测金属内支架是否对放射治疗有影响。方法　采用192Ir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%，对金属支架置入后患者的外照射或支架内近距离治疗的剂量不会造成有临床意义的影响。
목적　검측금속내지가시부대방사치료유영향。방법　채용192Ir작위방사원，재체외채용평행판전리실대국산얼태합금자팽식식관지가、국산불수강자팽식담관지가화불수강구낭확장형혈관지가적투사인자진행측정，이학정3충금속지가대사선적쇠감정황。결과　연구결과제시，해3충금속지가대사선적투사인자（쇠감계수）분별위：0.993, 0.988, 0.997，즉대사선적쇠감분별위：0.7%, 1.2%, 0.3%。결론　3충금속지가대사선적쇠감균불초과1.2%，대금속지가치입후환자적외조사혹지가내근거리치료적제량불회조성유림상의의적영향。
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 192Ir 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.