| 基于反向滤波器的倒谱法估计平均骨小梁间距 |
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| 引用本文： | 黄凯,他得安,王威琪,Lawrence HL.基于反向滤波器的倒谱法估计平均骨小梁间距[J].航天医学与医学工程,2007,20(6):451-454. |
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| 作者姓名： | 黄凯 他得安 王威琪 Lawrence HL |
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| 作者单位： | 1. 复旦大学电子工程系,上海,200433
2. Department of Radiology & Diagnostic Imaging,University of Alberta, Edmonton, Alberta,T6G 2B7,Canada |
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| 基金项目： | 上海市青年科技启明星计划
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国家自然科学基金
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高等学校博士学科点专项科研项目
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上海市自然科学基金 |
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| 摘 要： | 目的 探讨用改进的倒谱方法估计平均骨小梁间距(mean trabecular bone spacing,MTBS)的可行性.方法 提出了一种基于反向滤波器的改进的倒谱分析方法用于估计MTBS,并将该方法应用于仿真及离体牛胫骨松质骨中的实验信号.结果 改进的倒谱方法能有效减少超声换能器脉冲响应和组织散射特性对倒谱的干扰,而且实现简单,计算量小.结论 相比于传统的倒谱方法,改进的倒谱方法在估计MTBS时, 对弥散散射和噪声有更强的鲁棒性,因此估计MTBS的精度更高.
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| 关 键 词： | 平均骨小梁间距 超声背散射 倒谱 反向滤波器 滤波器 倒谱法 估计 梁间距 Filter Inverse Based Method Cepstrum Spacing Trabecular Bone Mean 精度 鲁棒性 噪声 散射特性 计算量 干扰 组织 脉冲响应 |
| 文章编号： | 1002-0837（2007）06-0451-04 |
| 收稿时间： | 2007-06-20 |
Estimation of Mean Trabecular Bone Spacing Using Cepstrum Method Based on Inverse Filter |
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| HUANG Kai,TA De-an,WANG Wei-qi,Lawrence HL.Estimation of Mean Trabecular Bone Spacing Using Cepstrum Method Based on Inverse Filter[J].Space Medicine & Medical Engineering,2007,20(6):451-454. |
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| Authors: | HUANG Kai TA De-an WANG Wei-qi Lawrence HL |
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| Abstract: | Objective To explore the feasibility of estimating mean trabecular bone spacing(MTBS) by the improved cepstrum method.Methods The improved cepstrum method based on an inverse filter is proposed in this paper.In order to test its performance,simulations were performed and bovine tibia cancellous bone specimens in vitro were used in our experiments.Results It's indicated that the improved cepstrum method can minimize the influence of transducer impulse response and tissue scatterer properties.It also can be easily implemented with little computation.Conclusion Compared with traditional cepstrum,the improved cepstrum method has a more accurate MTBS estimate because of its less sensitivity to the variety of MTBS,diffuse scattering and noise. |
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| Keywords: | mean trabecular bone spacing(MTBS) ultrasonic backscatter cepstrum inverse filter |
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