Calculation of electric fields and currents induced in a millimeter-resolution human model at 60 Hz using the FDTD method with a novel time-to-frequency-domain conversion

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Publication Type Journal Article
School or College College of Engineering
Department Electrical & Computer Engineering
Creator Furse, Cynthia M.; Gandhi, Om P.
Title Calculation of electric fields and currents induced in a millimeter-resolution human model at 60 Hz using the FDTD method with a novel time-to-frequency-domain conversion
Date 1996
Description The finite-difference time-domain (FDTD) method has previously been used to calculate induced currents in anatomically based models of the human body at frequencies ranging from 20 to 915 MHz and resolutions down to 1.31 cm . Calculations at lower frequencies and higher resolutions have been precluded by the huge number of time steps which would be needed to run these simulations in the traditional way. This paper describes a new method used to overcome this problem and calculate the induced currents in a MRI-based 6-mm-resolution human model at 60 Hz. A new algorithm based on solving two equations with two unknowns is used for calculating magnitude and phase from the CW FDTD simulation. This allows magnitude and phase calculations to be made as soon as steady-state is reached, which is within a fraction of a cycle. For incident electric fields of 10 kV/m, local induced current densities above 16 mA/m2 have been calculated in the torso, with even higher values up to 65 mNmz for the legs. These are considerably higher than the 4 or even 10 mA/m2 that have been suggested in the safety guidelines .
Type Text
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Journal Title IEEE Antennas and Propagation Society Conference
Volume 3
First Page 1798
Last Page 801
Subject Finite-difference time-domain method; FDTD; Induced currents; Human body model
Subject LCSH Time-domain analysis; Electric fields
Language eng
Bibliographic Citation Furse, C. M., & Gandhi, O. P. (1996). Calculation of electric fields and currents induced in a millimeter-resolution human model at 60 Hz using the FDTD method with a novel time-to-frequency-domain conversion. International Bioelectromagnetic Society Conference, IEEE Antennas and Propagation Society Conference, 3, 1798-801. July 21-25.
Rights Management (c)1996 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Format Medium application/pdf
Format Extent 260,148 bytes
Identifier ir-main,14243
ARK ark:/87278/s6np2p0b
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 706476
Reference URL https://collections.lib.utah.edu/ark:/87278/s6np2p0b
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