Magnetic resonance imaging of electrical conductivity in the human brain
Magnetic resonance imaging of electrical conductivity in the human brain
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DOI：
10.1109/tmag.2009.2016418
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发表时间：
2005
影响因子：
2.1
通讯作者：
M. Sekino;Yusuke Inoue;S. Ueno
中科院分区：
文献类型：
--
作者：
M. Sekino;Yusuke Inoue;S. Ueno
利用磁共振成像技术获得人脑各向异性电导率的空间分布。根据b因子与磁共振图像信号强度之间的关系，估计扩散的快速分量。电导率的估计是基于电导率和水的扩散系数之间的比例。灰质的电导率与方向没有明显的依赖关系。在白质的某些区域，如内囊和胼胝体，电导性表现出高的各向异性。该方法在脑电(EEG)和脑磁图(MEG)的电流源估计中具有潜在的应用价值。
Spatial distribution of anisotropic conductivity of the human brain was obtained using magnetic resonance imaging. The fast component of diffusion was estimated from the relation between the b-factor and the signal intensity of magnetic resonance images. Estimation of conductivity is based on the proportionality between conductivity and the diffusion coefficient of water. The gray matter did not have a clear dependence of conductivity on direction. In some regions in the white matter such as the internal capsule and the corpus callosum, conductivity exhibited high anisotropy. This method has potential applications in current source estimations of electroencephalography (EEG) and magnetoencephalography (MEG).