Simulation Study on the Eigenvalue Difference of the System Matrix in Magneto-Acoustic Tomography

被引：0
|
作者：
Ma R. [1 ]
Zhou X. [1 ]
Zhang S. [1 ]
Yin T. [1 ]
Liu Z. [1 ]
机构：
[1] Institute of Biomedical Engineering Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 04期
关键词：
Distri- bution of electrical conductivity; Eigenvalues; Inverse problem; Magnetoacoustic tomography; System matrix;
D O I：
10.19595/j.cnki.1000-6753.tces.201266
中图分类号：
学科分类号：
摘要：
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. © 2021, Electrical Technology Press Co. Ltd. All right reserved.
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页码：724 / 731
页数：7
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