基于扩散张量成像的脑组织各向异性电导率计算模型的研究综述

A Survey on Brain Tissues Anisotropic Conductivity Model Based on Diffusion Tensor Imaging

脑组织电导率不仅对脑电源分析起着至关重要的作用,而且也是及时发现脑组织发生功能性病变的重要依据之一。扩散张量成像是一种无损伤功能性成像新技术,具有很高的空间分辨率。基于扩散张量成像的脑组织电导率计算是近年来的一项重要研究课题。本文综述了已有脑组织各向异性电导率的计算模型,主要包括张量特征值线性模型、电场力-粘力平衡模型、王约束与体积约束模型、体积分数模型、电化学模型等,并综合分析了其优缺点。最后展望了该课题的研究发展趋势。

The conductivity of brain tissues is not only very important to analysis of EEG / MEG,but also one of the key factors of finding brain functional changes timely.Diffusion tensor imaging is a non-injury functional imaging technology,with high spatial resolution.The conductivity imaging of brain inner tissues is an important research topic.The existing anisotropic conductivity models of brain inner tissues were summarized,including tensor linear eigenvalues model,electric-viscous force balance model,Wang-constraint model,volume-constraint model,volume fraction model,and electrochemical model.And their advantages and disadvantages were discussed detailedly.At last,the development trend of this subject was stated.