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Influence of human model resolution on computed currents induced in organs by 60‐Hz magnetic fields
Author(s) -
Dawson Trevor W.,
Caputa Kris,
Stuchly Maria A.
Publication year - 1997
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/(sici)1521-186x(1997)18:7<478::aid-bem3>3.0.co;2-#
Subject(s) - voxel , resolution (logic) , computational physics , physics , computation , image resolution , bioelectromagnetics , electric field , scalar (mathematics) , electrical impedance , magnetic field , temporal resolution , electromagnetic field , finite difference time domain method , optics , algorithm , geometry , mathematics , computer science , quantum mechanics , artificial intelligence
The effects of human body model resolution on computed electric fields induced by 60 Hz uniform magnetic fields are investigated. A recently‐developed scalar potential finite difference code for low‐frequency electromagnetic computations is used to model induction in two anatomically realistic human body models. The first model consists of 204 290 cubic voxels with 7.2‐mm edges, while the second comprises 1 639 146 cubic voxels with 3.6‐mm edges. Calculations on the lower‐resolution model using, for example, the finite difference time domain or impedance methods, push the capabilities of workstations. The scalar method, in contrast, can handle the higher‐resolution model using comparable resources. The results are given in terms of average and maximum electric field intensities and current density magnitudes in selected tissues and organs. Although the lower‐resolution model provides generally acceptable results, there are important differences that make the added computational burden of the higher‐resolution calculations worthwhile. In particular, the higher‐resolution modelling generally predicts peak electric fields intensities and current density magnitudes that are slightly higher than those computed using the lower‐resolution modelling. The differences can be quite large for small organs such as glands. Bioelectromagnetics 18:478–490, 1997. © 1997 Wiley‐Liss, Inc.