空域滤波和扩散方法在超声斑点抑制中的应用和联系

摘要

系统介绍了目前最具代表性的两类超声图像斑点噪声抵制方法：基于局域统计特性的空域滤波和基于偏微分方程的扩散方法的发展，深入分析了在其发展过程中出现的典型模型的原理和优缺点，并通过公式推导和分析将基于滤波的方法转化为基于扩散的方法，建立了这两种方法之间的联系，最后分析了该领域亟待解决的关键问题和发展趋势。%　　Two kinds of typical speckle noise reduction methods in ultrasound imaging, one is space flter based on local statistac characters of image and the other is diffusion based on partial differential equation, are reviewed comprehensively. The deep analysises of the theory and advantage and disadvantage of the detail methods in each kind are presented. And then, the relation of the two kinds of method is found by formula derivation. Final y, key problems expected to be solved and future development trends are discussed in ultrasound image speckle noise reducation.