摘要
目的分析支架材质对冠状动脉支架CTA成像的影响。方法回顾性分析60例冠状动脉支架CTA资料。以不同材质把支架分组并与金标准冠状动脉造影对照,评价不同材质支架组间CTA图像质量并比较组间CTA诊断冠状动脉支架再狭窄的准确性。结果 60例患者共置入95个支架,包含13种不同支架厂商产品,两种支架材质,分别是钴铬合金支架(22个)和不锈钢支架(73个)。钴铬合金支架较不锈钢支架伪影少,可评价率(86.7%vs 77.5%,P=0.002)、诊断准确性高(94.7%vs 71.2%,P=0.034)。结论钴铬合金支架较不锈钢支架伪影少,可评价率高,诊断准确性高,有利于冠脉支架CTA评价,值得推荐厂家采用的较理想的支架材质。不锈钢价值伪影相对较多,冠脉支架CTA评价准确率相对较低,值得引起临床及厂家的注意。
Objective To evaluate the influence of stent material on the coronary angiography with 64-MSCT. Methods Coronary artery CTA images of 60 patients with coronary artery implanted stents were retrospectively analyzed. Stents of sixty patients were grouped into cobalt-chromium alloy group and stainless steel group based on stent material. We intended to investigate the influence of stent material on the CTA and the diagnostic accuracy of CTA in detecting prominent ISR, as referring to Coronary argiography. Results Ninety-five stents, including 13 types of stents, were implanted in 60 patients. The accuracy, sensitivity, specificity, positive predictive, negative predictive and Kappa value for CTA diagnosis of prominent ISR were 74.3% , 81.4% , 76.5% , 79.5% and 0. 558 respectively. In comparison to stainless steel stents, cobalt-chromium alloy stents seens less artifacts, and the rate of available evaluation （86.7% vs 77.5%, P =0. 002） and the accuracy of diagnosis （94.7% vs 71.2%, P = 0. 034） were bigger. Conclusion As compared with stainless steel stents, cobalt-chromium alloy stents show less artifactsr, which may be a material of an ideal for Coronary Artery Stent in CTA examination. We should pay attention that the ISR may be overevaluated in stainless steel stents with more artifacts on CTA.
出处
《医学影像学杂志》
2016年第7期1208-1211,共4页
Journal of Medical Imaging
