Name
Title | ||
|---|---|---|
Efficient calculation of current densities in the human body induced by arbitrarily shaped, low-frequency magnetic field sources |
Abstract | ||
|---|---|---|
In this paper, we extend the scalar-potential finite-difference (SPFD) approach in order to consider arbitrarily shaped time-harmonic field sources. The SPFD approach is commonly used to compute the currents induced by an externally applied magnetic field in regions with weak, heterogeneous conductivities such as, e.g., the human body. We present the extended scalar-potential finite-difference (Ex-SPFD) approach as a two step algorithm. In the first step, the excitation is computed by solving the magnetoquasistatic curl-curl equation on a coarse grid that is well adapted for the field sources. In the second step, the magnetic vector potential is prolongated onto a finer grid and a divergence correction inside the conductor is applied. Using the Maxwell-grid-equations (MGEs) of the finite integration technique, a geometric discretization scheme for Maxwell's equations, this new approach has been implemented in a parallel environment in order to account for the memory-demanding high-resolution anatomy models used for the calculation of induced currents inside the human body. We demonstrate the validity and the improved numerical performance of the new approach for a test case. Finally, an application example of a human exposed to a realistic electromagnetic field source is presented. |
Year | DOI | Venue |
|---|---|---|
2006 | 10.1016/j.jcp.2005.09.009 | J. Comput. Physics |
Keywords | Field | DocType |
step algorithm,efficient calculation,dosimetry,low-frequency magnetic field source,human-body,field source,realistic electromagnetic field source,new approach,magnetic field,time-harmonic field source,elf,spfd approach,coarse grid,current density,induced currents,extended scalar-potential finite-difference,human body,finite difference,low frequency,electromagnetic field,high resolution | Discretization,Magnetic field,Mathematical analysis,Scalar potential,Excitation,Magnetic potential,Electromagnetic field,Vector potential,Mathematics,Maxwell's equations | Journal |
Volume | Issue | ISSN |
214 | 1 | Journal of Computational Physics |
Citations | PageRank | References |
0 | 0.34 | 1 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Andreas Barchanski | 1 | 0 | 0.34 |
| Markus Clemens | 2 | 12 | 3.17 |
| Herbert De Gersem | 3 | 12 | 8.63 |
| Thomas Weiland | 4 | 24 | 6.26 |