Percutaneous transluminal coronary angioplasty (PTCA) with stent implantation is widely used for the treatment of coronary stenosis. However, restenosis after stent implantation frequently reported by intravascular ultrasound evaluation. This may occur because of the reduced luminal area after implantation, insufficient stent expansion, or by the elastic recoil of the stent (ERS). Quantitative evaluation of stent expanding should provide further information on how to decrease the incidence of re-stenosis. Many previous studies have observed stent properties in 2D. However, the stent geometry is changed in 3D space, and 3D measurements will provide further information on factors such as the risk for asymmetric ERS. We performed 3D reconstruction using high spatial resolution images obtained with a Micro-CT system to observe the 3D expansion behavior of a test stent and quantitatively evaluate ERS. The expansion behavior of each structural component of the stent varied, as did the ERS and eccentricity. ERS ranged from 2.4% to 9.2% during observation form proximal and distal positions in each component. The greatest difference in ERS between 2D and 3D measurements was 5.2%. 3D measurements provide more information on ERS than 2D measurements. Our result shows the importance of the observation, and the evaluation by three dimensions.

译文

:经支架植入的经皮腔内冠状动脉成形术(PTCA)被广泛用于治疗冠状动脉狭窄。但是,支架植入后的再狭窄经常通过血管内超声评估得到报道。这可能是由于植入后的管腔面积减小,支架扩张不足或支架(ERS)的弹性后坐力引起的。支架扩张的定量评估应提供有关如何减少再狭窄发生率的进一步信息。先前的许多研究都观察到了2D支架的特性。但是,支架的几何形状会在3D空间中发生变化,并且3D测量将提供有关诸如不对称ERS风险等因素的更多信息。我们使用Micro-CT系统获得的高空间分辨率图像进行了3D重建,以观察测试支架的3D扩展行为并定量评估ERS。支架的每个结构部件的膨胀行为都不同,ERS和偏心率也不同。在每个组件的近端和远端位置观察时,ERS范围从2.4%到9.2%。 2D和3D测量之间的ERS最大差异为5.2%。 3D测量比2D测量提供更多有关ERS的信息。我们的结果从三个维度显示了观察和评估的重要性。

+1
+2
100研值 100研值 ¥99课程
检索文献一次
下载文献一次

去下载>

成功解锁2个技能,为你点赞

《SCI写作十大必备语法》
解决你的SCI语法难题!

技能熟练度+1

视频课《玩转文献检索》
让你成为检索达人!

恭喜完成新手挑战

手机微信扫一扫,添加好友领取

免费领《Endnote文献管理工具+教程》

微信扫码, 免费领取

手机登录

获取验证码
登录