支架影像增强技术StentBoost对支架后扩张的指导意义与血管内超声的比较分析

A novel fluoroscopic image processing technique StentBoost for guiding post-stenting dilation compared with IVUS

目的探讨支架影像增强技术StentBoost显影及判定支架后扩张的可行性及准确性。方法选择同时行血管内超声(IVUS)和StentBoost检查的心内科住院患者1 7例,其中无钙化患者3例,浅表钙化患者11例,深层钙化患者3例。其中14例因支架膨胀不均匀给予后扩张,分别对支架后扩张前后冠状动脉定量分析(QCA)、IVUS和StentBoost检测数据进行相关性分析。结果后扩张前支架内最小直径IVUS与StentBoost的相关性(r=0.9856,P<0.01)优于QCA与StentBoost的相关性(r=0.9754,P<0.01),也优于QCA与IVUS的相关性(r=0.9611,P<0.01);后扩张后支架内最小直径QCA与StentBoost的相关性(r=0.8774,P<0.01)最好。QCA、IVUS和StentBoost三者的相关性在深层钙化患者明显优于浅表钙化患者。结论支架后扩张前IVUS和StentBoost数据的相关性较好,而后扩张后两者相关性下降。

Objective To investigate the feasibility and accuracy of use of fluoroscopic image processing technique StentBoost to enhance coronary stent visualization and improve detection of post stenting dilation. Methods Seventeen patients with coronary heart disease were examined simultaneously by intravascular ultrasound（IVUS） and StentBoost. Of them,3 had no calcification, 11 had superficial calcification and 3 had deep calcification,14 were given postdilation because of inadequate stent expansion. The correlations between examination data of quantitative coronary angiography（QCA） ,IVUS and StentBoost pre-and post-dilation were analyzed. Results Correlation of minimum stent diameter between IVUS and StentBoost was better （r = 0. 9856,P 〈 0.01） than that between QCA and StentBoost （r = 0. 9754,P 〈 0. 01）,and that between QCA and IVUS （r = 0. 9611 ,P 〈 0.01） before the post-dilation;correlation of minimum stent diameter between QCA and StentBoost was the best （r = 0. 8774,P 〈 0.01） after postdilation. Conclusion StentBoost had good correlation with IVUS for stent expansion measurement before post-dilation,but the correlation decreased after postdilation.