The influence on acoustic frequency characteristics of conductivity gradual-varying tissue in magnetoacoustic tomography (MAT)

Xiaohe Zhao; Guoqiang Liu; Xiaoheng Yan; Xin Chen; Siping Chen

doi:10.1016/j.compbiomed.2018.08.028

The influence on acoustic frequency characteristics of conductivity gradual-varying tissue in magnetoacoustic tomography (MAT)

Comput Biol Med. 2019 Jan:104:105-110. doi: 10.1016/j.compbiomed.2018.08.028. Epub 2018 Aug 30.

Authors

Xiaohe Zhao¹, Guoqiang Liu², Xiaoheng Yan³, Xin Chen⁴, Siping Chen⁴

Affiliations

¹ University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China.
² University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: gqliu@mail.iee.ac.cn.
³ Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China; Liaoning Technical University, Huludao 125105, China.
⁴ Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imagine, Shenzhen 518060, China.

PMID: 30468913
DOI: 10.1016/j.compbiomed.2018.08.028

Abstract

Background: As a functional imaging technology, magneto acoustic tomography (MAT) has broad application prospect in early tumor diagnosis and image monitoring during treatment.

Method: The influence on the acoustic field characteristics of the gradual change in conductivity was studied in magneto-acoustic tomography with current injection (MAT-CI) in this article.

Result: Theoretical analysis showed that the value of electro-acoustic conversion ratio (E-ACR) was different in different source frequencies under the same conductivity gradual-varying boundary.

Conclusion: The frequency characteristics of the acoustic pressure tend to shift towards the low frequency region. This conclusion provides a theoretical foundation for the MA signal detection and processing system optimization in the area of conductivity gradual-varying.

Keywords: Conductivity gradual-varying; Electric-acoustic conversion ratio (E-ACR); Frequency characteristics of MAP; Frequency shift; Magnetoacoustic tomography (MAT).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Algorithms*
Computer Simulation*
Electric Conductivity*
Humans
Image Processing, Computer-Assisted*
Magnetic Fields
Models, Theoretical*
Signal Processing, Computer-Assisted*
Sound
Tomography*