非均匀磁源模型
Heterogeneous source model for magnetoenecephalography
摘要：
本文提出了一种新的脑磁图（MEG）逆问题的源模型，该模型结合了传统的扩展参数方法和成像方法，目的是分别识别分布在大脑中的局灶电流源和背景活动。新的源模型由两个项组成，以表示不同的空间特征：一种是基于从球体到皮层表面的映射，用几个参数表示的局部贴片源，另一种是使用皮层表面上的网格点上的基本偶极子表示的分布式源。由于这两种模型尚未同时使用，我们称之为非均匀源模型。
英文摘要：
In this paper, we propose a novel source model for a magnetoencephalography (MEG) inverse problem that combines a conventional extended parametric approach and an imaging approach.Our aim is to separately identify a focal current source and background activities spread over the brain.The new source model consists of two terms to represent different spatial characteristics: one is a localized patch source represented with a few parameters based on a mapping from a sphere to the cortex surface,and the other is a distributed source expressed using elemental dipoles on grid points on the cortical surface. We call it a heterogeneous source model, because these two models have not been used simultaneously.Effectiveness of the proposed method is shown via numerical simulations.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
