Research on magnetoacoustic tomography with magnetic induction reconstruction based on improved time inversion algorithm
10.7687/j.issn1003-8868.2018.01.046
- VernacularTitle:基于改进时间反演算法的感应式磁声成像图像重建研究
- Author:
Shuai ZHANG
1
;
Wen-Long LI
;
Xue-Ying ZHANG
;
Zi-Xiu LI
;
Ming-Kang ZHAO
;
Kun CUI
;
Xun SHI
;
Gui-Zhi XU
Author Information
1. 河北工业大学
- Keywords:
MAT-MI;
generalized finite element method;
time inversion algorithm;
image reconstruction;
forward problem;
inverse problem;
acoustic velocity;
acoustic heterogeneity
- From:
Chinese Medical Equipment Journal
2018;39(1):46-51,61
- CountryChina
- Language:Chinese
-
Abstract:
Objective To develop a new algorithm to reconstruct the distribution of acoustic sources of magnetoacoustic tomography with magnetic induction(MAT-MI)in the acoustic inhomogeneous media,which is developed on the basis of generalized finite element method (GFEM) and modified time inversion algorithm. Methods The acoustic and acoustic coupling theory and the basic equations of acoustics were used to study the forward and inverse problems of the acoustic inhomogeneous concentric sphere magneticacoustic coupling model. The solution of acoustic non-uniform media wave equation based on GFEM was proposed.The method solved the problem of acoustically inhomogeneous media sound source reconstruction and conductivity reconstruction.At the same time,the distribution of velocity was reconstructed by rotating the pairs of transducers and the time reversal algorithm. Results The proposed algorithm could accurately reconstruct the acoustic source distribution in acoustic inhomogeneous media,and could obtain the distribution of sound velocity during the reconstruction of sound source and recover the image well. Conclusion The proposed algorithm had its feasibility and effectiveness verified,and gains advantages in MAT-MI reconstruction of acoustic inhomogeneous media.
