| 离体猪肝组织散射元平均间距的小波估计 |
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| 引用本文： | 牛金海,严加勇,王鸿樟,谢志行,刘镇清.离体猪肝组织散射元平均间距的小波估计[J].上海交通大学学报,2000,34(11):1467-1470. |
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| 作者姓名： | 牛金海 严加勇 王鸿樟 谢志行 刘镇清 |
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| 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 |
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| 基金项目： | 国家自然科学基金资助项目! (编号 :39670 2 16) |
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| 摘 要： | 基于准规则排列散射元，构建了生物组织的超声散射模型，用小波分析方法处理了模拟肝脏和新鲜狸肝组织的超声回波信号，得到该方法下离体猪肝的散射元平均间距ｄ＝１．６１９ｍｍ，同时，文中就小波分析方法与基于ＡＲ模型的估计方法作了比较，研究表明，小波分析既能较好地估计出生物组织散射元的平均间距，也可以估计出其空间分布，从而避免利用ＡＲ模型估计时，由于ＡＲ阶次的不确定而带来的误差。
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| 关 键 词： | 小波分析 生物组织 散射元平均间距 猪肝 AR模型 |
Estimating Average Scatterer Spacing of Pig Liver in vitro with Wavelet Analysis |
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| NIU Jin-hai,YAN Jia-yong,WANG Hong-zhang,XIE Zhi-xing,LIU Zhen-qing.Estimating Average Scatterer Spacing of Pig Liver in vitro with Wavelet Analysis[J].Journal of Shanghai Jiaotong University,2000,34(11):1467-1470. |
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| Authors: | NIU Jin-hai YAN Jia-yong WANG Hong-zhang XIE Zhi-xing LIU Zhen-qing |
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| Abstract: | A relatively regular spacing distribution model of biotissue was constructed with the ultrasonic scattering. The backscattered ultrasound echo of phantom and in vitro pig liver tissue was studied with wavelet analysis, the average scatterer spacing was obtained with d =1.619 mm. The comparison of this method was made with the autoregressive method. The analysis indicates that it is feasible to estimate not only the average scatterer spacing, but also the spacing distribution with the wavelet analysis and it can also avoid the error caused by the uncertainty of order p in the autoregressive method. |
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| Keywords: | wavelet analysis ultrasound biotissue average scatterer spacing |
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