乳腺电阻抗扫描系统组织特征频率拟合的研究  

Study on Crossover Frequency with Electrical Impedance Scanning System

作　　者：郑均安[1] 张峰[1] 王浩[1] 鲍旭东[1] 

机构地区：[1]东南大学影像科学与技术实验室,南京210096

出　　处：《生物医学工程研究》2011年第1期24-27,共4页Journal Of Biomedical Engineering Research

摘　　要：研究多频电阻抗扫描系统中激励频率分布对于组织特征频率ωc拟合的影响,并提出一种基于局部频率拟合的方法,提高特征频率的拟合精度,增大良恶性病例间的区分度。根据三种不同模式下的拟合结果,分别求取良性病例与恶性病例特征频率的分布距离,根据分布距离的大小来判断测量数据以及拟合方式的有效性。结果表明,在采用局部拟合方法后,分布距离较全局拟合方法有了明显的提高。A new method based on local frequency was developed to fit the crossover frequency by multi-frequency data from electrical impedance scanning system.Mean while,a new method on the infulence of drive frequency distribution,which was be useful to improve the fitting accuracy,to distinguish the innocent tumour and cancer easier was prenested.According to the fitting result in three models,the distance was caculated through the crossover frequency distribution between innocent tumour and cancer,which was used to judug whether the data and the fitting method were accuracy to identify the innocent tumour and cancer.It turns out that the method based on local frequency is more effcient than one based on global.

关 键 词：乳腺电阻抗 特征频率 Cole模型 分布距离 特征参数 局部频率拟合 

分 类 号：R318[医药卫生—生物医学工程]