基于小波能量和小波熵的组织损伤评价研究  

Research on Evaluation of Tissue Damage Based on Wavelet Energy and Wavelet Entropy

作　　者：明文[1,2] 谭乔来[1] 钱盛友[1] 邹孝[1] 廖志远[1] 

机构地区：[1]湖南师范大学物理与信息科学学院,湖南长沙410081 [2]常德职业技术学院,湖南常德415000

出　　处：《测试技术学报》2015年第5期404-408,共5页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(11174077;11474090);湖南省自然科学基金资助项目(11JJ3079);湖南省教育厅基金资助项目(12C0237;12C0204)

摘　　要：针对高强度聚焦超声治疗过程监控,本文对小波能量和小波熵在组织损伤评价中的适用性进行研究.将高强度聚焦超声击打新鲜猪肉组织前后获得的散射回波通过A/D转换输入到计算机,再对接收信号提取小波能量和小波熵,通过分析其变化来判定组织损伤程度.实验结果表明:对于不同损伤级的组织,小波能量和3种不同形式小波熵的变化和区分能力存在差异.依据各参量在不同损伤级的分布情况,确定各损伤级对应的参量取值区间.综合所有参量对组织样本进行损伤级归类,能够为组织损伤情况的监测提供依据.For high intensity focused ultrasound therapy process monitoring,In this paper,the applicability of wavelet energy and wavelet entropy in the evaluation of tissue damage is researched.The scattering echo was obtained before and afterfrom the fresh pork tissue was hit by high intensity focused ultrasound and was input into the computer through A/D conversion,then the wavelet energy and wavelet entropy of received signal were extracted,and the tissue damage degree was determined by analyzing changes of parameters.The results show that the change and resolution ability of wavelet energy＇s and three kinds of wavelet entropy＇s are different for tissues in different damage degrees.According to the distribution of various parameters in different damage levels,the corresponding parameter value interval in each damage level can be determined.The tissue samples were classified according to all synthetic parameters,which can provide the basis for the monitoring of tissue damage

关 键 词：高强度聚焦超声 组织损伤 小波变换 小波能量 小波熵 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]