| 超声CT理论与方法综述 |
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| 引用本文： | 倪文磊.超声CT理论与方法综述[J].CT理论与应用研究,2004,13(3):50-55. |
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| 作者姓名： | 倪文磊 |
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| 作者单位： | 北京大学数学学院,北京,100871 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金 |
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| 摘 要： | 目的概述超声CT(Computed tomography)理论的发展过程中提出的的一些主要的理论和方法.方法分别对无散射条件下透射型超声CT、反射型超声CT以及衍射断层成像(diffraction tomography)的相关理论的研究目的、基本思想,以及相应的图像重建算法做了简要的概述,同时介绍了反散射(inverse scattering)问题在超声成像中的应用.结论由于超声传播的复杂性,各种超声CT理论都有其自身的成立条件,从而使得CT理论的应用范围有限.
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| 关 键 词： | 超声CT 透射型超声CT 反射型超声CT 衍射断层成像 反散射问题 图像重建算法 |
| 文章编号： | 1004-4140(2004)03-0050-06 |
| 修稿时间： | 2004年6月12日 |
Review on Theories and Methods of Ultrasound Computed Tomography |
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| NI Wen-lei.Review on Theories and Methods of Ultrasound Computed Tomography[J].Computerized Tomography Theory and Applications,2004,13(3):50-55. |
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| Authors: | NI Wen-lei |
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| Abstract: | Purpose: Prime theories and methods of ultrasound computed tomography (UCT) will be briefly summarized in this paper. Method: Here, we pay most attention to transmission-mode UCT and reflection- mode UCT under the condition that scattering is neglected ,and diffraction tomography. The research purposes and principles of these theories are reviewed as well as image reconstruction method. In the end, we will introduce briefly the application of inverse scattering problem in ultrasonic imaging. Result: Although ultrasound computed tomography has receive more and more attention in medical imaging, it is only applied successfully to some soft issue , because the theories about it have strict existence conditions, such as weak scattering, etc. |
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| Keywords: | UCT transmission-mode UCT reflection-mode UCT diffraction tomography inverse scattering problems image reconstruction algorithm |
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