International Scientific Surgical Association

The First International Scientific Teleconference

"new technologies in medicine - 2004"

V.Krasteva, S.Papazov

CURRENT DENSITY DISTRIBUTION IN MAGNETIC STIMULATION OF THE BRAIN

Centre for Biomedical Engineering, Bulgarian Academy of Sciences

Sofia, Bulgaria

Abstract. We propose a method to solve the forward problem for analysis of the 3D spatial distribution of the electrical field induced in the head. We used an in-house developed software system including the following: module (A) to calculate magnetic vector potential of the alternating magnetic field, excited by external coils positioned in the air above the head; linking module (B) to introduce the calculated components of the external field as Dirichlet boundary conditions for the boundary regions of the module (C) - 3D realistic finite element model (FEM) of the head. Thus the complication of having to include current-carrying conductors in the FEM was avoided. The simplicity of the proposed method makes it convenient for various applications. For example, an optimization procedure may be considered for improving the efficacy of different external excitation coil configurations and placements.

Key words. Magnetic simulation, finite element modeling, current density, electric fields, brain non-homogeneous media.

Krasteva V., Papazov S. CURRENT DENSITY DISTRIBUTION IN MAGNETIC STIMULATION OF THE BRAIN  // Новые технологии в медицине: Сб. докл. Первой международной дистанционной науч.-практ. конф., Санкт-Петербург, 15-30 марта 2004 г. � СПб, 2004. � С. 88-89

E-mail:  vessika@clbme.bas.bg
E-mail:  papasow@tu-sofia.bg

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