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仿人体组织材料的超声背向散射系数测量研究 被引量:2

Measurement of Ultrasonic Backscatter Coefficient in Tissue-Mimicking Material
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摘要 材料的背向散射系数是与声速、声衰减系数并列的重要声学参数,常被用于疾病诊断和材料设计.与声速、声衰减系数的测量相比,背向散射系数的测量装置和结果处理较为复杂,迄今国内外并没有统一的标准.本文以仿人体组织材料为研究对象,采用了仿人体组织的超声散射理论模型,建立了脉冲回波法的背向散射系数测量装置;实验研究了水浸聚焦探头焦点位置的选择与背向散射回波信号长度的选择对测量结果的影响.结果表明,探头在物体中的聚焦位置对测量结果影响较小;随着散射回波信号长度的增加,计算得出的散射系数会有所减小,但影响有限. Backscatter coefficient is one of the important acoustic parameters with velocity and attenuation.It is often used in diagnosis and material design. Compared with velocity and attenuation measurement, backscatter coefficient measurement is more complicated both for equipment and computation. Unified method for backscatter coefficient measurement remains unsolved both in home and abroad. In this work, the author applies the ultrasonic backscatter model and sets up the measurement equipment based on pulse-echo mode for a kind of tissue-mimicking matedal. Influences of both ultrasonic focus position and data length on backscatter coefficient measurement are studied by experiments. Results show that the focus position and data length have minor impact on the backscatter coefficient measurement.
出处 《电子学报》 EI CAS CSCD 北大核心 2010年第5期998-1001,共4页 Acta Electronica Sinica
基金 国家质量监督总局质检公益项目(No.AHY0704)
关键词 超声背向散射系数 焦点位置 数据长度 仿人体组织材料 ultrasound backscattering coefficient focus position data length tissue mimicking material
作者简介 杨平 男,副研究员,1976年6月出生于山东烟台,1998年、2001年和2006年分别在西安科技大学和清华大学获得工学学士、工学硕士和工学博士学位.现于中国计量科学研究院力学声学研究所超声研究室任职,主要从事信号处理与检测、超声检测技术等方面的研究工作.E—mail:yangp@nim.ac.cn 祝海江(通信作者)男,副教授,1971年出生于江西宜春,2001年和2004年分别在西安科技大学和中国科学院自动化研究所获得工学硕士和工学博士学位.现于北京化工大学信息科学与技术学院自动化系任职,主要从事模式识别与智能系统、信号处理与检测等方面的研究工作.E-mail:zhuhj@mail.buct.edu.cn
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参考文献8

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同被引文献25

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