人体肝脏组织CT图像的分维特征研究  

A Study on Characteristic of Fractal Dimension of Liver Tissue CT Image

作　　者：陈真诚[1] 周兆英[1] 赵于前[2] 蒋大宗[3] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084 [2]中南大学信息物理学院生物医学工程研究所,湖南长沙410083 [3]西安交通大学生物医学工程研究所,陕西西安710049

出　　处：《航天医学与医学工程》2005年第3期206-210,共5页Space Medicine & Medical Engineering

基　　金：中国博士后基金资助(2003033130)

摘　　要：目的用分形维数来表征肝脏软组织图像的纹理特征,比较肝脏病变组织与正常组织CT图像的分维特征差别。方法采用差分盒计算方法,计算肝脏软组织CT图像中ROI(rangeofinteresting)的分维数值。结果从所提供的肝脏CT图像的样本中研究发现:1)肝脏正常软组织的分维数值大约在2.35左右,而癌变软组织的分维数均在2.40以上;2)同一脏器软组织的分维数值与它们所处的位置无关,只与组织所表现出来的性质有关,即:是正常组织还是癌变组织;3)分维数值从某种意义上表征了人体脏器组织的一些纹理特征;4)噪声对肝脏组织所呈现出来的固有纹理特征没有太大的影响。结论肝脏正常软组织CT图像的分维数值小于癌变组织CT图像的分维数值。Objective To express the character of texture of liver CT image by fractal dimension. And to compare the value of fractal dimensions of normal liver images with that of the abnormal liver images. Method The value of fractal dimensions of liver tissue CT images in ROI (range of interesting) was calculated by differential box counting (DBC). Result It was demonstrated that: 1) The value of normal liver tissue CT image was about 2.35, but that of the abnormal was higher than 2.40; 2) the fractal dimension value of the same parenchyma image was not related to their different areas, but was related to the inherent character of the texture; 3) the value of fractal dimension convey some characteristic of the texture in certain sense; 4) noise has no impact on the character of inherent texture of the liver tissues. Conclusion The value of normal liver tissue CT images is less than the abnormal.

关 键 词：医学图像处理 纹理分析 分维 肝脏组织 

分 类 号：R319[医药卫生—基础医学] TP391[自动化与计算机技术—计算机应用技术]