多普勒超声诊断设备的技术研究

发布时间：2018-02-09 08:34

本文关键词： 彩色多普勒血流成像杂波滤波器血液流速估计 FieldⅡ　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：最近几十年以来,医学超声成像领域发展迅速,涌现出了一大批具有突破性意义的新技术,新方法,其中很有代表性的一个就是多普勒超声成像技术。与其它医学成像技术如x光、核磁共振成像等相比,它有无创伤、无辐射、成本低、实时性等特点。因此,虽然如今新的技术不断出现,多普勒超声成像技术在医疗诊断中依然占据着不可替代的重要地位。本文首先回顾和梳理了多普勒超声成像技术的发展历程,明确了本课题的研究意义。接下来,论文中着重讨论了多普勒超声成像技术中应用最为广泛的彩色多普勒血流检测技术。彩色多普勒血流检测技术中包含多个环节,本文对这些环节从理论上一一进行了分析。影响彩色多普勒血流检测准确性、实时性的最关键因素就是采用何种血液流速检测方法以及能否有效抑制由低速运动的血管壁、组织结构引起的杂波信号。所以本文对杂波滤波和血液流速检测这两个环节进行了详细的讨论,分析和比较了不同杂波滤波器实现方法、不同血液流速检测方法的理论基础与各自的优缺点。最后,本文在MATLAB仿真平台用超声仿真工具箱Fieldll上设计和实现了彩色多普勒血流成像,通过仿真实验的手段确定了参数以及各环节应使用何种实现方法,为后续在硬件上实现超声多普勒诊断奠定了坚实的基础,具有较高的理论和实际价值。
[Abstract]:In recent decades, the field of medical ultrasound imaging has developed rapidly, and a large number of breakthrough new technologies and methods have emerged. One of the most representative is Doppler ultrasound imaging. Compared with other medical imaging techniques, such as X-ray and magnetic resonance imaging, it has the characteristics of non-invasive, radiation-free, low cost, real-time and so on. Although new technologies are emerging, Doppler ultrasound imaging still occupies an irreplaceable important position in medical diagnosis. Firstly, this paper reviews and combs the development of Doppler ultrasound imaging technology. Then, the most widely used color Doppler flow detection technology in the Doppler ultrasound imaging technology is discussed. The color Doppler flow detection technology includes many links. In this paper, all these links are analyzed theoretically. The most important factors that affect the accuracy of color Doppler flow detection are the method of blood flow velocity detection and whether the blood vessel wall moving at low speed can be effectively suppressed. Therefore, the clutter filter and blood velocity measurement are discussed in detail, and the different clutter filter realization methods are analyzed and compared. The theoretical basis of different blood velocity measurement methods and their advantages and disadvantages. Finally, the color Doppler flow imaging is designed and implemented on the MATLAB simulation platform with the ultrasonic simulation toolbox Fieldll. Through the means of simulation experiment, the parameters and the realization methods of each link are determined, which lays a solid foundation for the subsequent hardware realization of ultrasonic Doppler diagnosis, and has high theoretical and practical value.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：R445.1

【相似文献】