Inverse localization of electric dipole current sources in finite element models of the human head
Inverse localization of electric dipole current sources in finite element models of the human head
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DOI：
10.1016/s0013-4694(96)95698-9
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发表时间：
1997-04-01
期刊：
影响因子：
--
通讯作者：
Pesch, J
中科院分区：
文献类型：
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作者：
Buchner, H;Knoll, G;Pesch, J
本文介绍了实形头部模型中多源逆定位的有限元相关程序。偶极源是通过在相邻节点上放置适当的单极源来建模的。建立了偶极子源的先导场算子。讨论了求解反问题的两种不同策略，即组合优化技术和正则化方法，并将其应用于视觉诱发电位，给出了示例性结果。所描述的大多数程序都是全自动的，只需要适当的输入准备。所提供的示例的总体工作（从EEG记录到结果的目视检查）可以在大约一周内完成，其中大部分时间是等待在标准和负担得起的工程工作站上计算引线场矩阵或逆计算的时间。(C) 1997爱思唯尔科学爱尔兰有限公司
The paper describes finite element related procedures for inverse localization of multiple sources in realistically shaped head models. Dipole sources are modeled by placing proper monopole sources on neighboring nodes. Lead field operators are established for dipole sources. Two different strategies for the solution of inverse problems, namely combinatorial optimization techniques and regularization methods are discussed and applied to visually evoked potentials, for which exemplary results are shown. Most of the procedures described are fully automatic and require only proper input preparation. The overall work for the example presented (from EEG recording to Visual inspection of the results) can be performed in roughly a week, most of which is waiting time for the computation of the lead field matrix or inverse calculations on a standard and affordable engineering workstation. (C) 1997 Elsevier Science Ireland Ltd.