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软组织超声散射子频率特性的研究 被引量:4

Study on the Frequency Property of Ultrasonic Scatterer in Soft Tissue
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摘要 由于生物软组织对超声波的衰减、吸收等作用,组织超声背散射射频(RF)信号的中心频率会发生偏移,利用超声背散射RF信号中心频率的偏移量来估计软组织超声特征散射子的粒径等特征成为可能。该文在软组织超声背散射RF信号功率谱理论分析的基础上,制作了4种不同散射子粒径的实验仿体,并对实验仿体进行了信号采集和数据处理,研究其频率特性。研究结果表明,生物软组织超声背散射RF信号的中心频率随超声特征散射子粒径的增大而向低频方向移动,且越来越接近发射超声信号的中心频率。 Due to the effects of ultrasonic attenuation and absorption by biological soft tissue, central frequency of ultrasonic backscattered radio frequency(RF)signals will be offset, and it is possible to use the offset of central frequency to estimate the features of scatterer in the soft tissues, such as scatterer size, and so on. Based on the theoretical analysis of power spectrum of ultrasonic baekscattered RF signals, this paper has made four experimental imitations which have different scatterer sizes, and conducted a signal acquisition and processed the data for the experimental imitations to study the frequency characteristics. The results of research show that the central frequency of ultrasonic backscattered RF signals will trend to low-frequency when the size of ultrasonic feature scatterer is increased, getting more and more closer to the central frequency of launch ultrasonic signal.
出处 《压电与声光》 CSCD 北大核心 2011年第5期761-763,767,共4页 Piezoelectrics & Acoustooptics
基金 国家自然科学基金资助项目(10974128) 陕西省自然科学基金资助项目(SJ08A03)
关键词 软组织 中心频率 背散射RF信号 偏移 散射子粒径 soft tissue central frequency baekscattered RF signal offset scatterer size
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参考文献9

  • 1BIGELOW T A, O' BRIEN W D J. Scatterer size estimation in pulse echo ultrasound using focused sources: theoretical approximations and simulation analysis[J].Acoust Soc Am, 2004, 116.. 578-593.
  • 2BIGELOW T A. Estimating the medical ultrasound in vivo power spectrum[D]. Ph D Thesis.. University of Illinois at Urbana-Champaign,2004.
  • 3他得安,王威琪,汪源源,余建国.评价松质骨状况的一种背散射频谱方法[J].声学技术,2007,26(3):406-410. 被引量:7
  • 4郭建中,林书玉,曹辉,袁益民.基于TMS320 VC5402的超声检测高速采样系统[J].压电与声光,2007,29(2):173-174. 被引量:3
  • 5郭建中,林书玉,高伟.超声换能器电感电容匹配电路的改进[J].压电与声光,2005,27(3):257-259. 被引量:26
  • 6万明习 卞正中.医学超声学[M].西安:西安交通大学出版社,1985..
  • 7OELZE M L, O' BRIEN W D J. Method of improved scatterer size estimation and application to parametric imaging using ultrasound [J]. Acoust Soc Am, 2002, 112(6) :3053-3063.
  • 8OELZE M L, O'BRIEN W D J, BLUE J P,et al. Differentiation and characterization of rat mammary fibroadenomas and 4T1 mouse carcinomas using quantitative ultrasound imaging[J]. IEEE Trans on Medical Imaging, 2004, 23(6): 764-771.
  • 9OELZE M L, ZACHARY J F, O'BRIEN W D J. Characterization of tissue microstructure using ultrasonic backscatter: theory and technique for optimization using a Gaussian form factor [J]. Acoust Soc Am, 2001, 112(3): 1202-1211.

二级参考文献19

  • 1郭建中,林书玉.超声检测中维纳逆滤波解卷积方法的改进研究[J].应用声学,2005,24(2):97-102. 被引量:10
  • 2Werner P.Knowledge about osteoporosis:assessment,correlates and outcomes[J]..Osteopor Int,2005,16(2):115.127.
  • 3Hakulinen MA,Day JS,Toras J,et al.Prediction of density and mechanical properties of human trabecular bone in vitro by using ultrasound transmission and backscattering measurements at 0.2-6.7 MHz frequency range[J].Phys Med Biol,2005,50(8):1629-1642.
  • 4Hans D,Wu C,Njeh CF,et al.Ultrasound velocity of trabecular cubes reflects mainly bone density and elasticity[J].Calcif Tissue Int,1999,64(1):18-23.
  • 5Nicholson PHF,Muller R,Lowet G,et al.Do quantitative ultrasound measurements reflect structure independently of density in human vertebral cancellous bone[J].Bone,1998,23(5):425-431.
  • 6Wear KA,Laib A.The dependence of ultrasonic backscatter on trabecular thickness in human calcaneus:theoretical and experimental results[J].IEEE Trans on UFFC,2003,50(8):979-986.
  • 7Hakulinen MA,Toyras J,Saarakkala S,et al.Ability of ultrasound backscattering to predict mechanical properties of bovine trabecular bone[J].Ultrasound in Med & Biol,2004,30(7):919-927.
  • 8Padilla F,Peyrin F,Laugier P.Prediction of backscatter coefficient in trabecular bones using a numerical model of three-dimensional microstructure[J].J Acoust Soc Am,2003,113(2):1122-1129.
  • 9TA Dean,HUANG Kai,WANG Weiqi,et al.Predict ultrasonic backscatter coefficient in cancellous bone by theory and experiment[A].Proceedings of the 27th Annual International Conference of the IEEE-EMBS[C].Sept.1-4,2005,Shanghai,China,1131-1134.
  • 10Konofagou EE,Varghese T,Ophir J.Spectral estimators in elastography[J].Ultrasonics,2000,38(1-8):412-416.

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