Magnetoencephalography Source Localization using Improved Simplex Method

被引：0

作者：

An, Kwang-Ok ^{[1
]}

Im, Chang-Hwan ^{[2
]}

Jung, Hyun-Kyo ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Elect Engn, Seoul, South Korea

[2] Yonsei Univ, Dept Biomed Engn, Wonju, South Korea

来源：

WORLD CONGRESS ON MEDICAL PHYSICS AND BIOMEDICAL ENGINEERING 2006, VOL 14, PTS 1-6 | 2007年 / 14卷

关键词：

Equivalent current dipole (ECD); Initial simplex; Magnetoencephalography (MEG); Shaking technique; Simplex method;

D O I：

暂无

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Simplex method has been used extensively for magnetoencephalography (MEG) source localization problems. Like other deterministic techniques, however, it can be easily trapped in local optima. In this study, some modifications have been made to improve the ability of finding global optima: 1) constructing an initial simplex using sensitivity of variables, 2) considering relationship between variables, and 3) performing a shaking technique based on polynomial interpolation. The efficiency of the proposed method was tested using simulated MEG data. From the simulation results, it is verified that the improved simplex method can yield more reliable inverse solutions than the conventional one.

引用

页码：2726 / +

页数：2

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