基于形态学重构的超声医学图像滤波方法  

A Medical Ultrasonic Image Filtering Method Based on Morphological Reconstruction

作　　者：张建炜[1] 林江莉[1] 李德玉[1] 汪天富[1] 

机构地区：[1]四川大学生物医学工程系,成都610065

出　　处：《生物医学工程学杂志》2007年第3期481-484,共4页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(60272060);四川省青年科技基金资助项目(05ZQ026-019)

摘　　要：Speckle噪声是造成超声医学图像质量下降的最主要原因。我们通过修改形态学重构算法-Downhill算法的初始条件,使其适用于超声医学图像的去噪处理。首先在掩模图像中确定标记图像作为算法的初始化和开始区域,再使用改进的Downhill算法对超声医学图像进行滤波处理。实验结果表明,与其他3种传统滤波方法相比,该方法能快速有效地去除心脏腔室内的Speckle噪声同时保留图像的轮廓细节信息。Speckle is the main reason which declines the quality of medical ultrasonic images. In this paper, the initial condition for the Downhill filter, a morphological reconstruction algorithm, is modified and applied in the speckle reduction. Firstly, the initial area and start position as the mark image was determined in the marker image. Then the modified Downhill filter was used in the ultrasonic marker image. The results showed that, in comparison with the other three filters, this modified Downhill filter, while maintaining the integrity of the contour ,could reduce the speckle in the regions of cavity efficiently and rapidly.

关 键 词：图像滤波 超声医学图像 形态学重构算法 

分 类 号：R318[医药卫生—生物医学工程]