【作者】 邓建奇；

【导师】 周激流；

【作者基本信息】 四川大学 ， 通信与信息系统， 2006， 硕士

【摘要】 医学超声是一门较新的综合性学科，近几十年来发展十分迅速。超声诊断技术作为超声医学的一个重要应用，以其特有的安全、快速、实时的优势发挥着巨大的作用，并已在临床医学中得到广泛应用。随着科学技术的发展以及人类对自身健康状况的重视，超声在医学中的重要作用已经得到了普遍的认可。但是，人们对自身的生活环境与医疗条件的关注程度的不断提高，对超声系统也提出了新的要求。普通的B型超声诊断仪越来越满足不了人们的需求，由此彩超得到快速的普及。 彩色超声诊断仪利用彩色多普勒技术将血流参数的估算结果，如血流流速图，以伪彩的方式叠加在B阶灰度图像上面。它不仅能够通过B阶图像观察到人体的解剖结构，而且可以通过伪彩图像显示出诸如血流的大小和方向等信息，为临床诊断提供了很好的辅助信息。但是现在彩超在满足高性能的条件下，成本昂贵。彩超采集的信息量远远大于B超，采集的信息量越大，要保证显示结果的准确性以及实时性也就越困难。许多彩超生产厂商都采用了很多昂贵的元器件来解决这个问题，不过这样也就大大增加了彩超的成本。如何在保持彩超性能的同时，降低彩超成本，成为了大家广泛研究的课题。 本论文选取彩色超声系统作为主要研究对象，重点研究其彩色血流成像系统中血流参数估算技术。在了解了其系统构成以及原理的前提下，对传统的方法进行了深入的研究，针对其中一些弱项环节，提出了新的解决办法。 首先，介绍了课题背景以及超声医学的一些基础知识，并着重介绍了超声更多还原

【Abstract】 Medical ultrasound is a new and comprehensive science developing rapidly in recent years. As an important application in medical ultrasound, the diagnostic ultrasound plays a great role with its advantages in safety, speed and real-time, and has an extensive use in clinical medicine. With the development of science and technology and people’s attention to their health, the significance of medical ultrasound has been well accepted. However, more and more attention to living environment and medical situation brings new requirements to ultrasound system; the color ultrasound has been popularized as the traditional B-mode ultrasound can not meet people’s needs.Diagnostic color ultrasound instrument applies color Doppler technology to overlay the estimation result of blood flow parameter such as velocity of blood flow on the B-mode gray-scale images by using pseudo color method. It not only can show the anatomical structure of human beings through B-mode image, but also can display information such as magnitude and direction of blood flow velocity. This provides useful auxiliary information for clinical diagnosis. Though the present color ultrasound performs very well, it is too expensive. The more information it collects, the more difficult it may face to meet the accuracy and real-time requirements. Many manufacturers apply expensive components to solve this problem; however, this adds cost to color ultrasound. Therefore, how to reduce the cost and keep its high performance becomes a research subject in a wide range.更多还原