基于声换能器特性的三维磁感应磁声成像重建算法

doi:10.3969/j.issn.0258-8021. 2014. 05.03

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摘要为了完善磁感应磁声成像算法，使其在真实声检测系统下都适用，研究声换能器特性对磁感应磁声成像重建效果的影响。依据换能器声场分布测量数据，采用插值方法建立真实声换能器三维声场分布模型，利用格林函数法及离散化方法建立磁感应磁声成像正逆问题算法。为了验证该算法，分别采用球扫描和柱扫描方式进行仿真。基于SL CT仿真模型建立三维仿体电导率模型，用有限元方法对瞬态电磁场进行分析，根据计算的涡流分布结果，使用Matlab进行数值计算。仿真结果表明：该算法可基本重建出原始力源的分布，重建图像的相关系数分别达到98.49%和94.96%，对一般声换能器比较适用。该研究为进一步的实验研究和实验重建的精确性提供理论依据。

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	马任张顺起殷涛刘志朋^#*

关键词 ：磁感应磁声成像, 真实声换能器特性, 扫描方式, 三维重建

Abstract：Aim to apply MATMI reconstruction algorithm to general sound detection systems, the influence of acoustic transducers on MATMI image reconstruction were investigated in this paper. The acoustic intensity measurement system was used to measure the acoustic field, and then the data was used to build the acoustic transducer model by a interpolation method. The model was applied to forward and inverse problems of MATMI based on Green’s function and discretization method. In order to verify the algorithm, a simulation was carried out using sphere scan schema and cylinder scan schema. A 3D phantom model was set up based on SL model in CT, with the help of finite element analysis method and the distribution of the transient electromagnetic field and the eddy current were calculated. Simulation and reconstruction results through numerical calculation using Matlab were obtained. Results show that the algorithm can reconstruct the distribution of acoustic source vector; the correlation coefficients are 9849% and 9496%, which can be applied to the general transducer. This study provided a basis for the experimental study of MATMI and a precise reconstruction of conductivity distribution.

Key words： magnetoacoustic tomography with magnetic induction characteristics of the acoustic transducers scan schema 3D reconstruction

基金资助:国家自然科学基金重点项目（51137004）；国家自然科学基金面上项目（81171424）；天津市自然基金青年基金(13JCQNJC14000)

引用本文:

马任张顺起殷涛刘志朋^#*. 基于声换能器特性的三维磁感应磁声成像重建算法[J]. 中国生物医学工程学报, 2014, 33(5): 532-538.
MA Ren ZHANG Shun Qi YIN Tao LIU Zhi Peng^#*. A 3D MATMI Reconstruction Algorithm Based on Characteristics of Acoustic Transducer#br#. journal1, 2014, 33(5): 532-538.

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http://cjbme.csbme.org/CN/10.3969/j.issn.0258-8021. 2014. 05.03 或 http://cjbme.csbme.org/CN/Y2014/V33/I5/532

［1］Zou Y, Guo Z. A review of electrical impedance techniques for breast cancer detection ［J］. Medical Engineering & Physics, 2003, 25(2): 79-90.
［2］Cheney M, Isaacson D, Newell JC. Electrical impedance tomography ［J］. SIAM Review, 1999, 41(1): 85-101.
［3］Gabriel C, Gabriel S, Corthout E. The dielectric properties of biological tissues: I. literature survey ［J］. Physics in Medicine and Biology, 1996, 41(11): 2231-2249.
［4］Foster K, Schwan H. Dielectric properties of tissues and biological materials: a critical review ［J］. Crit Rev Biomed Eng, 1989, 17(1): 25-104.
［5］Surowiec AJ, Stuchly SS, Barr JR, et al. Dielectric properties of breast carcinoma and the surrounding tissues ［J］. IEEE Transactions on Biomedical Engineering, 1988, 35(4): 257-263.
［6］Xia Rongmin, Li Xu, He Bin. Magnetoacoustic tomographic imaging of electrical impedance with magnetic induction ［J］. Applied Physics Letters, 2007, 91(8): 083903.
［7］Ma Qingyu, He Bin. Investigation on magnetoacoustic signal generation with magnetic induction and its application to electrical conductivity reconstruction ［J］. Physics in Medicine and Biology, 2007, 52(16): 5085-5099.
［8］Li Xu, Xu Yuan, He Bin. Imaging electrical impedance from acoustic measurements by means of magnetoacoustic tomography with magnetic induction (MAT-MI) ［J］. IEEE Transactions on Biomedical Engineering, 2007, 54(2): 323-330.
［9］Li Xu, Xu Yuan, He Bin. Magnetoacoustic tomography with magnetic induction for imaging electrical impedance of biological tissue ［J］. Journal of Applied Physics, 2006, 99(6): 066112.
［10］Xu Yuan, He Bin. Magnetoacoustic tomography with magnetic induction (MAT-MI) ［J］. Physics in Medicine and Biology, 2005, 50(21): 5175-5187.
［11］Ma Qingyu, He Bin. Magnetoacoustic tomography with magnetic induction: a rigorous theory ［J］. IEEE Transactions on Biomedical Engineering, 2008, 55(2): 813-816.
［12］Mariappan L, He Bin. Magnetoacoustic Tomography with Magnetic Induction: Bioimepedance reconstruction through vector source imaging ［J］. IEEE Transactions on Medical Imaging, 2013, 32(3): 619-627.
［13］Roth BJ. The role of magnetic forces in biology and medicine ［J］. Experimental Biology and Medicine, 2011,
236(2): 132-137.
［14］Arfken GB, Weber HJ, Harris FE. Mathematical Methods For Physicists A Comprehensive Guide ［M］. Oxford: Academic Press, 2013:461-466.
［15］高上凯. 医学成像系统［M］. 北京: 清华大学出版社有限公司, 2000: 255-263.
［16］Roitner H, Haltmeier M, Nuster R, et al. Deblurring algorithms accounting for the finite detector size in photoacoustic tomography ［J］. Journal of Biomedical Optics, 2014, 19(5): 56011.
［17］Pramanik M, Ku Geng, Wang Lihong V. Tangential resolution improvement in thermoacoustic and photoacoustic tomography using a negative acoustic lens ［J］. Journal of Biomedical Optics, 2009, 14(2): 024028.
［18］Li Menglin, Wang Lihong V. A study of reconstruction in photoacoustic tomography with a focused transducer ［C］ // Alexander AO, Wang Lihong V, eds. The Eighth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acoustooptics. San Jose: SPIE, 2007:64371E.