Research on Time-frequency Characteristics of Magneto-acoustic Signal of Different Thickness Medium Based on Wave Summing Method_Journal of Biomedical Engineering

Authors：

ZHANGShunqi , YINTao , MARen ,  LIUZhipeng

Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192;

Corresponding author：

LIUZhipeng, Email: lzpeng67@163.com

Keywords：

magneto-acoustic effect; wave summing method; time-frequency characteristic; thickness of medium; conductivity distribution

DOI：

10.7507/1001-5515.20150131

Video：

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Abstract Full text Figures/Tables Video References Cited by

Functional imaging method of biological electrical characteristics based on magneto-acoustic effect gives valuable information of tissue in early tumor diagnosis, therein time and frequency characteristics analysis of magneto-acoustic signal is important in image reconstruction. This paper proposes wave summing method based on Green function solution for acoustic source of magneto-acoustic effect. Simulations and analysis under quasi 1D transmission condition are carried out to time and frequency characteristics of magneto-acoustic signal of models with different thickness. Simulation results of magneto-acoustic signal were verified through experiments. Results of the simulation with different thickness showed that time-frequency characteristics of magneto-acoustic signal reflected thickness of sample. Thin sample, which is less than one wavelength of pulse, and thick sample, which is larger than one wavelength, showed different summed waveform and frequency characteristics, due to difference of summing thickness. Experimental results verified theoretical analysis and simulation results. This research has laid a foundation for acoustic source and conductivity reconstruction to the medium with different thickness in magneto-acoustic imaging.

Citation： ZHANGShunqi, YINTao, MARen, LIUZhipeng. Research on Time-frequency Characteristics of Magneto-acoustic Signal of Different Thickness Medium Based on Wave Summing Method. Journal of Biomedical Engineering, 2015, 32(4): 717-724. doi: 10.7507/1001-5515.20150131 Copy

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17.	马任,殷涛,张顺起,等.基于声换能器特性的磁感应磁声成像正问题分析[J].生物医学工程与临床,2012,16(3):218-222.
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1. HAEMMERICH D,SCHUTT D J,WRIGHT A W,et al.Electrical conductivity measurement of excised human metastatic liver tumours before and after thermal ablation[J].Physiol Meas,2009,30(5):459-466.
2. GABRIEL S,LAU R W,GABRIEL C.The dielectric properties of biological tissues Ⅱ:Measurements on the frequency range 10Hz to 20GHz[J].Phys Med Biol,1996,41(11):2251-2269.
3. 陈晓艳,吴君,王化祥,等.不同体位呼吸过程的电阻抗断层成像研究[J].生物医学工程学杂志,2010,27(5):1004-1007.
4. SUROWIEC A J,STUCHLY S S,BARR J R,et al.Dielectric-properties of breast carcinoma and the surrounding tissues[J].IEEE Trans Biomed Eng,1988,35(4):257-263.
5. TOWE B C,ISLAM M R.A magneto-acoustic method for the noninvasive measurement of bioelectric currents[J].IEEE Trans Biomed Eng,1988,35(10):892-894.
6. ROTH B J,BASSER P J,WIKSWO J P Jr.A theoretical-model for magnetoacoustic imaging of bioelectric currents[J].IEEE Trans Biomed Eng,1994,41(8):723-728.
7. WEN Han,SHAH J,BALABAN R S.Hall effect imaing[J].IEEE Trans Biomed Eng,1998,45(1):119-124.
8. 王世刚,马任,张顺起,等.基于声偶极子理论的磁声成像声源发生机制探讨[J].生物医学工程学杂志,2014,31(1):91-96.
9. 柯丽,灵芝,杜强,等.磁感应断层成像中激励线圈参数的选取[J].生物医学工程学杂志,2013,30(1):1-5.
10. XIA Hui,LIU Guoqiang,JIANG Lingtong,et al.Imaging method of new magneto-acoustic impedance tomography with magnetic induction[C]//Proceedings of Second International Conference on Sports Science And Sports Engineering,2009,3(3):140-144.
11. LI Xu,XU Yuan,HE Bin.Imaging electrical impedance from acoustic measurements by means of magnetoacoustic tomography with magnetic induction (MAT-MI)[J].IEEE Trans Biomed Eng,2007,54(2):323-330.
12. MARIAPPAN L,HE Bin.Magnetoacoustic tomography with magnetic induction:bioimepedance reconstruction through vector source imaging[J].IEEE Trans Med Imaging,2013,32(3):619-627.
13. ZHOU Lian,ZHU Shan'an,HE Bin.A three-dimensional bioimpedance imaging algorithm by means of magnetoacoustic tomography with magnetic induction[J].Acta Electronica Sinica,2013,41(2):288-294.
14. LI Xu,HE Bin.Multi-excitation magnetoacoustic tomography With Magnetic Induction for bioimpedance Imaging[J].IEEE Trans Med Imaging,2010,29(10):1759-1767.
15. XU Yuan,HE Bin.Magnetoacoustic tomography with magnetic induction (MAT-MI)[J].Phys Med Biol,2005,50(21):5175-5187.
16. SUN Xiaodong,ZHANG F,MA Qingyu,et al.Acoustic dipole radiation based conductivity image Reconstruction for magnetoacoustic tomography with magnetic induction[J].Appl Phys Lett,2012,100(2):024105-024105-4.
17. 马任,殷涛,张顺起,等.基于声换能器特性的磁感应磁声成像正问题分析[J].生物医学工程与临床,2012,16(3):218-222.
18. 李珣.基于乳腺肿瘤模型的感应式磁声成像正问题研究[J].中国生物医学工程学报,2010,29(3):390-398.
19. 张顺起,殷涛,马任,等.注入电流式磁声成像的电导率模型构建和实验研究[J].中国生物医学工程学报,2011,30(6):801-806.
20. 刘志朋,马任,张顺起,等.磁声耦合声信号幅频特性的实验研究[J].生物医学工程研究,2013,32(1):1-6.
21. LIU Guoqiang,HUANG Xin,XIA Hui,et al.Magnetoacoustic tomography with current injection[J].Chin Sci Bull,2013,58(30):3600-3606.
22. 郑君里.信号与系统[M].北京:高等教育出版社,2000:341-349.
23. XIA Rongmin,LI Xu,HE Bin.Comparison study of three different image reconstruction algorithms for MAT-MI[J].IEEE Trans Biomed Eng,2010,57(3):708-713.

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