磁声成像系统矩阵特征值差异性仿真研究

doi:10.19595/j.cnki.1000-6753.tces.201266

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Abstract Magneto-acoustic tomography (MAT) is an imaging technology using the coupling of electromagnetic field and ultrasonic field, which can display the electrical characteristics distribution of biological tissues with ultrasonic resolution. In order to analyze the influence of some detection conditions on the reconstruction of MAT and obtain a high-resolution conductivity image, the eigenvalue difference of MAT is simulated. Based on the principle of acoustic source, the system matrix of MAT is established for different number of acoustic transducers, different acquisition angles and two different bandwidth transducers. Based on the matrix model, the eigenvalues of system matrix are calculated, and the TSVD method is used to reconstruct the conductivity image. The results show that the number of transducers and the bandwidth characteristics of transducers have great influence on the reconstruction of conductivity information, while the acquisition angle has little effect on the conductivity information. However, the acquisition angle will affect the field of image, resulting in incomplete reception of MAT signal and distortion of reconstructed conductivity image. This paper will provide a reference for the experiment design and subsequent applications of MAT.

Key words： Magnetoacoustic tomography inverse problem eigenvalues system matrix distri- bution of electrical conductivity

Received: 21 September 2020

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TM12

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	Ma Ren
	Zhou Xiaoqing
	Zhang Shunqi
	Yin Tao
	Liu Zhipeng

Cite this article:

Ma Ren,Zhou Xiaoqing,Zhang Shunqi等. Simulation Study on the Eigenvalue Difference of the System Matrix in Magneto-Acoustic Tomography[J]. Transactions of China Electrotechnical Society, 2021, 36(4): 724-731.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201266 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I4/724

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