| 基于Wigner-Ville分布用超声回波测量随机介质的特征 |
| |
| 引用本文： | 牛金海,王鸿樟,刘镇清. 基于Wigner-Ville分布用超声回波测量随机介质的特征[J]. 应用声学, 2000, 19(3): 14-19 |
| |
| 作者姓名： | 牛金海 王鸿樟 刘镇清 |
| |
| 作者单位： | 1. 上海交通大学生物医学工程系 上海 200030
2. 同济大学声学研究所 上海 200092 |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 生物组织微结构具有随机介质的特性，文中构建了生物组织超声散射的一维随机介质模型，提出用Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布函数方法估计该随机仙擀的空间分布特征，仿真和实验结果表明这一方法具有良好的空间分辨率，能较好地检测出随机介质微小散射元的个数和空间分布同时能精确地保估出散射元平均间距，研究结果表明该方法还具有良好的抗噪声性等优良特性。
|
| 关 键 词： | 随机介质 Wigner－Ville分布 超声回波测量 |
Ultrasonic measurement of characteristics of random medium based on Wigner-Ville distribution |
| |
| Niu Jinhai,Wang Hongzhang and Liu Zhenqing. Ultrasonic measurement of characteristics of random medium based on Wigner-Ville distribution[J]. Applied Acoustics(China), 2000, 19(3): 14-19 |
| |
| Authors: | Niu Jinhai Wang Hongzhang Liu Zhenqing |
| |
| Affiliation: | Department of Biomedical Engineering, Shanghai Jiaotong University Shanghai 200030;Department of Biomedical Engineering, Shanghai Jiaotong University Shanghai 200030;Institute of Acoustic, Tongji University Shanghai 200092 |
| |
| Abstract: | In biological tissue, the microstructure under the incidence of ultrasonic waves behaves more like a random medium, in which the microparticles are distributed randomly. A one dimensional random medium model of biological tissue is constructed and the application of Wigner-Ville distribution function to measure the number t spa tial distribution, average scatterer spacing of random medium is addressed in this paper.Results of computer simulation and experimental study indicate that this method has the advantages of high spatial resolution, and high sensitivity to delicate variation in the spatial distribution of micro-scatterers, even in noise background. |
| |
| Keywords: | Ultrasound Random medium Averaging scatterer spacing Wigner-Villedistribution |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《应用声学》浏览原始摘要信息 |
|
点击此处可从《应用声学》下载免费的PDF全文 |
