Stellar光子探测器薄层重建对冠脉支架CT成像效果的影响

发布时间：2018-03-26 16:47

本文选题：冠状动脉支架　切入点：光子探测器　出处：《放射学实践》2016年12期

【摘要】：目的:评价Stellar光子探测器联合Safire迭代重建技术冠脉CTA中不同重建层厚对冠脉支架显示的影响,探讨改善CT冠脉支架成像效果的有效方法。方法:36例冠状动脉支架(81个)植入术后患者行双源CT(采用Stellar光子探测器)冠状动脉血管成像,使用Safire迭代重建技术、并分别采用3种层厚(0.50、0.60及0.75mm)进行图像重建获得3组图像。对图像质量进行主观和客观评价,并比较3组图像间的差异。结果:两位阅片者对三组图像质量主观评分的一致性均良好(Kappa=0.85~0.88)。三组间支架显示情况的评分差异有统计学意义(P=0.000),以0.50mm组的评分最高[(94.130±0.558)分];图像噪声的主观评分中,随着重建层厚的增加,图像的噪声降低,三组间差异有统计学意义(P=0.000),但0.50mm组与0.60mm组之间的差异无统计学意义(P0.05)。图像质量客观分析显示,支架内管腔噪声在3组间的差异无统计学意义(P0.05)。结论:Stellar光子探测器0.50mm层厚重建配合Safire迭代重建技术获取的冠脉支架CTA图像质量整体最佳,尤其对于直径3mm的冠脉支架,能为临床提供高质量的图像。
[Abstract]:Objective: To evaluate the Stellar photon detector combined with Safire iterative reconstruction of coronary CTA in different slice thickness of coronary stent shows, to explore the effective methods to improve the imaging effect of CT coronary stent. Methods: 36 cases of coronary artery stent implantation (81) underwent dual source CT (using the Stellar photon detector) coronary artery angiography Safire, the use of iterative reconstruction technique, and use 3 kinds of thickness (0.50,0.60 and 0.75mm) were obtained in 3 groups of images. The image reconstruction of the subjective and objective evaluation of image quality, and compare the difference between the 3 images. Results: two radiologists were good consistency of three groups of subjective score of image quality the (Kappa=0.85~0.88) between the three groups. Stent shows statistically significant difference (P=0.000), the 0.50mm group showed the highest score [(94.130 + 0.558)%]; subjective score of image noise, with reconstruction thickness The increase of the noise of the image is reduced, the difference was statistically significant between the three groups (P=0.000), but there was no significant difference between 0.50mm group and 0.60mm group (P0.05). The objective image quality analysis showed that the stent lumen noise in the absence of statistically significant differences between the 3 groups (P0.05). Conclusion: Stellar photon detector 0.50mm with the acquisition of Safire slice thickness reconstruction iterative reconstruction of coronary stent CTA best overall image quality, especially for coronary stent diameter 3mm, can provide high quality images for clinical.

【作者单位】：中国医科大学附属第一医院放射科;西门子医疗CT事业部;
【分类号】：R541.4;R816.2

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