Open AccessStudy on the localization of the electric dipole sources
Author(s) -
Wu Chong-Qing,
Shuang Zhao
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.5180
Subject(s) - dipole , electric dipole moment , electric field , transformer , physics , magnetic dipole , electric dipole transition , position (finance) , field (mathematics) , matrix (chemical analysis) , computer science , nuclear magnetic resonance , voltage , mathematics , quantum mechanics , materials science , finance , pure mathematics , economics , composite material
The research of dipole source localization has great significance in both clinical research and applications. For example, the EEG recording from the scalp is widely used for the localization of sources of electrical activity in the brain. This paper presents a closed formula that describes the electric field of dipoles at arbitrary position, which is a linear transformer called the transfer matrix. The expression of transfer matrix and its many useful characteristics are given, which can be used for the analysis of the electrical fields of dipoles.This paper also presents the closed formula for determining the location and magnitude of single dipole or multi-dipoles according to its electrical field distribution. A calculation result for a single dipole shows that the dipole will be located at the midpoint of a line segment if there are equivalent fields at its two ends.