脑动脉瘤模型应变测量的网络物理系统

Chaoyang Shi, M. Kojima, C. Tercero, H. Anzai, M. Ohta, K. Ooe, S. Ikeda, T. Fukuda, F. Arai, M. Negoro, K. Irie, Guiryong Kwon
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引用次数: 1

摘要

对脑动脉瘤的生长进行预测是脑血管干预人工智能诊断的发展方向。为了达到这一目的,需要对动脉瘤区域的壁面剪应力、应变、压力、变形和流速进行评估。本研究以脑动脉瘤模型的体外应变和变形测量为重点,提出了一种网络物理系统,该系统构建脑动脉瘤膜性硅胶模型,并与脉动血流模拟专用泵集成,构建视觉系统测量模型内脉动血流循环时不同区域的应变。实验结果表明,动脉瘤颈部的距离应变最大值和面积应变最大值最大(0.042和0.052),其次是动脉瘤顶部(0.023和0.04),其次是主血管段(0.01和0.014),并结合计算机流体动力学模拟计算了壁面剪切应力、振荡剪切指数和动脉瘤形成指数。获得2008年和2011年脑动脉瘤的医学影像资料。诊断结果与2011年动脉瘤生长情况一致。本文提出的测量方法提供了一种应变和变形的测量方法,与计算机流体动力学和光弹性应力分析相补充,为血管内手术的高级诊断提供了一种选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A cyber-physical system for strain measurements in the cerebral aneurysm models
For the development of artificial intelligent diagnosis for cerebrovascular intervention, it is desirable to forecast the growth of cerebral aneurysms. In order to achieve such purpose, it is needed to evaluate wall shear stress, strain, pressure, deformation and flow velocity in the aneurysm region. In this research, we focus on in-vitro strain and deformation measurements of cerebral aneurysm models, and propose a cyber-physical system, in which a scaled-up membranous silicone model of cerebral aneurysm was built and integrated with a specialized pump for the pulsatile blood flow simulation, and a vision system was constructed to measure the strain on different regions on the model with pulsatile blood flow circulated inside. Experimental results show that both distance and area strain maxima were larger for the aneurysm neck (0.042 and 0.052), followed by the aneurysm dome (0.023 and 0.04) and then by the main blood vessel section (0.01 and 0.014), which were complemented with computer fluid dynamics simulation for the inclusion of wall shear stress, oscillatory shear index and aneurysm formation index. Medical imaging data of the cerebral aneurysm in 2008 and 2011 was obtained. Diagnosis results have concordance with the aneurysm growth in 2011. The presented measurement method offers an option for measuring strain and deformation to be complementary with computer fluid dynamics and photoelastic stress analysis for advanced diagnostic in the endovascular surgery.
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