医疗卫生装备2018，Vol.39Issue(1)：46-51,61,7.DOI:10.7687/j.issn1003-8868.2018.01.046
基于改进时间反演算法的感应式磁声成像图像重建研究
Research on magnetoacoustic tomography with magnetic induction reconstruction based on improved time inversion algorithm
摘要
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.关键词
感应式磁声成像/广义有限元法/时间反演算法/图像重建/正问题/逆问题/声速/声学非均匀性Key words
MAT-MI/generalized finite element method/time inversion algorithm/image reconstruction/forward problem/inverse problem/acoustic velocity/acoustic heterogeneity分类
医药卫生引用本文复制引用
张帅,李文龙,张雪莹,李子秀,赵明康,崔琨,史勋,徐桂芝..基于改进时间反演算法的感应式磁声成像图像重建研究[J].医疗卫生装备,2018,39(1):46-51,61,7.基金项目
国家自然科学基金青年项目(51607056) （51607056）
河北省自然科学基金项目(E2015202050,E2015202292) （E2015202050,E2015202292）
天津市应用基础研究计划项目(13JCQNJC14100) （13JCQNJC14100）
河北省重点研发计划项目(15272002,15275704) （15272002,15275704）
河北省高层次人才资助项目(C2015005012) （C2015005012）
河北省高等学校科研计划项目(BJ2016013,QN2016044,ZD2017020) （BJ2016013,QN2016044,ZD2017020）
