| 基于医学影像学的心血管支架力学性能分析 |
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| 引用本文： | 徐江,杨杰,杨基,黄楠,刘亚龄.基于医学影像学的心血管支架力学性能分析[J].西南交通大学学报,2016,29(1):201-208. |
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| 作者姓名： | 徐江 杨杰 杨基 黄楠 刘亚龄 |
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| 基金项目： | 国家自然科学基金资助项目(10872176) |
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| 摘 要： | 为了寻找更为简便的基于医学影像学狭窄血管建模的方法,利用特征轮廓提取的简化建模方法,建立了基于狭窄冠脉CT图像的血管支架-狭窄血管耦合有限元模型,对比分析了血管支架在基于CT的狭窄血管模型和理想化狭窄血管模型中的力学行为,引用临床研究结果分析了两种模型计算的合理性.研究结果表明,两种模型在支架的应力分布、撑开刚度、回弹率、狗骨头 率、血管管腔面积等力学性质上均存在差异,基于CT模型中,血管平均应力1.22 MPa,最小管腔面积6.1 mm2;理想化模型中血管平均应力1.54 MPa,最小管腔面积5.1 mm2;基于CT的有限元模型分析结果更接近临床研究结果.
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| 关 键 词： | 医学图像 冠脉狭窄 支架 有限元分析 |
| 收稿时间： | 2013-03-01 |
Mechanical Properties Analysis of Coronary Stent Based on Medical Images |
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| XU Jiang,YANG Jie,YANG Ji,HUANG Nan,LIU Yaling.Mechanical Properties Analysis of Coronary Stent Based on Medical Images[J].Journal of Southwest Jiaotong University,2016,29(1):201-208. |
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| Authors: | XU Jiang YANG Jie YANG Ji HUANG Nan LIU Yaling |
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| Abstract: | In order to find a simple method to build the coronary artery stenosis model based on medical images, a simplified narrow coronary artery-stent coupling finite element (FE) model based on CT images was built using the feature contour extraction method. The mechanical properties of the stent in an ideal coronary artery stenosis was then studied using the CT-based FE model in comparison with the ideal simplified artery FE model. In addition, some clinical study results were used to verify the rationality of the two models. The results show that some differences in mechanical properties existed between the two models, such as the stress distribution, expansion stiffness, recoil rate, dog bone rate, and the mean area of blood vessel. For the CT-based model, the mean stress of vessel was 1.22 MPa and the minimal area of vessel after stent implantation was 6.1 mm2, while they were 1.54 MPa and 5.1 mm2, respectively, in the ideal simplified model. The results obtained by the CT-based simplified model was more close to the clinical results than the ideal simplified model. |
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