基于三层长骨裂纹模型的线性超声导波仿真
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- 英文论文题名：Simulation of linear ultrasonic guided wave based on 3-layers long bone crack model
- 论文作者：徐峰 ; 刘丹 ; 刘成成 ; 李旦 ; 他得安
- 英文论文作者：XU Feng ; LIU Dan ; LIU Cheng-cheng ; LI Dan ; TA De-an ; Department of Electronic Engineering ; Fudan University
- 年：2016
- 作者机构：复旦大学电子工程系;
- 论文关键词：长骨 ; 裂纹 ; 线性超声 ; 导波
- 英文论文关键词：long bone ; crack ; linear ultrasonic ; guided wave
- 会议召开时间：2016-10-28
- 会议录名称：2016年全国声学学术会议论文集
- 语种：中文
- 分类号：R68;TB559
- 学会代码：OGSM
- 会议名称：2016年全国声学学术会议
- 会议地点：中国湖北武汉
- 主办单位：中国声学学会
- 学会名称：中国声学学会
- 页数：4
- 文件大小：696k
- 原文格式：D
- 会议级别：全国
摘要
采用线性超声导波对长骨裂纹进行检测是目前医学超声领域的一大研究热点。本文采用二维时域有限差分方法(2D-FDTD)建立了包含软组织、皮质骨和骨髓的三层长骨模型。采用低频(100 k Hz)激发方式,仅激发两个低阶的导波模式S0和A0。通过仿真实验,分析裂纹宽度与裂纹角度对S0、A0导波模式幅度的影响。结果表明,随裂纹宽度的增大,导波模式S0和A0的幅度均逐渐减小;随裂纹角度的增大,A0的幅度呈上升趋势,而S0的幅度呈先上升再下降的趋势,并且S0变化趋势的转折角度随裂纹宽度增大而增大。本文的研究对于采用线性超声导波评价及监测长骨骨折提供了一定依据。
Detection of the long bone crack using linear ultrasonic guided wave is a hot research topic in the field of ultrasound. Two-dimensional finite difference time domain(2D-FDTD) method is used in this paper to establish a 3-layers model of long bone, consists of soft tissue, cortical bone and marrow. Low frequency(100 k Hz) excitation mode is used, which stimulated only two low-order guided wave modes S0 and A0. In the simulation, analysis is taken on the relationship between the amplitude of guided wave modes and the width/angle of the crack. The results show that with the increase of crack width, the amplitude of the guided wave modes S0 and A0 both gradually decreased. With the increase of crack angle, the amplitude of A0 increased, while the amplitude of S0 showed a trend which increases first and then falls. And the turning angle increased with the width of the crack. This study provides a basis for the evaluation and monitoring of long bone fracture using linear ultrasonic guided wave.
Detection of the long bone crack using linear ultrasonic guided wave is a hot research topic in the field of ultrasound. Two-dimensional finite difference time domain(2D-FDTD) method is used in this paper to establish a 3-layers model of long bone, consists of soft tissue, cortical bone and marrow. Low frequency(100 k Hz) excitation mode is used, which stimulated only two low-order guided wave modes S0 and A0. In the simulation, analysis is taken on the relationship between the amplitude of guided wave modes and the width/angle of the crack. The results show that with the increase of crack width, the amplitude of the guided wave modes S0 and A0 both gradually decreased. With the increase of crack angle, the amplitude of A0 increased, while the amplitude of S0 showed a trend which increases first and then falls. And the turning angle increased with the width of the crack. This study provides a basis for the evaluation and monitoring of long bone fracture using linear ultrasonic guided wave.
引文
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[9]刘丹,许凯亮,他得安.长骨裂纹宽度和角度对低阶超声导波的影响[J].声学学报,2015,40(4):555-562.Liu D,Xu K,Ta D.Impact of long bone fracture width and angle on low-order ultrasonic guided waves[J].ACTA ACUSTICA,2015,40(4):555-562.
[10]Xu K,Liu D,Ta D,et al.Quantification of guided mode propagation in fractured long bones[J].Ultrasonics,2014,54(5):1210-1218.
[2]Payne J E,Joseph S Y,Imaging of Stress Fractures.In;Springer:2015;63-79
[3]Genant H K.Quantitative ultrasound:assessment of osteoporosis and bone status[M].Taylor&Francis,1999.
[4]Zhang Z,Xu K,Ta D,et al.Joint spectrogram segmentation and ridge-extraction method for separating multimodal guided waves in long bones[J].Science China Physics,Mechanics and Astronomy,2013:1-7.
[5]Potsika V T,Grivas K N,Protopappas V C,et al.Application of an effective medium theory for modeling ultrasound wave propagation in healing long bones[J].Ultrasonics,2014,54(5):1219-1230.
[6]Rose J L.Ultrasonic Waves in Solid Media[M].Cambridge Univ Pr,2004.
[7]Laugier P.Bone quantitative ultrasound[M].New York:Springer,2011.
[8]Ta D,Wang W,Wang Y,et al.Dispersion of guided waves in viscous liquid-filled pipes[J].Insight-Non-Destructive Testing and Condition Monitoring,2008,50(1):14-18.
[9]刘丹,许凯亮,他得安.长骨裂纹宽度和角度对低阶超声导波的影响[J].声学学报,2015,40(4):555-562.Liu D,Xu K,Ta D.Impact of long bone fracture width and angle on low-order ultrasonic guided waves[J].ACTA ACUSTICA,2015,40(4):555-562.
[10]Xu K,Liu D,Ta D,et al.Quantification of guided mode propagation in fractured long bones[J].Ultrasonics,2014,54(5):1210-1218.