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Eddy-current simulations using an independent impedance method in anisotropic biological tissues

Nele De Geeter UGent, Guillaume Crevecoeur UGent and Luc Dupré UGent (2011) IEEE TRANSACTIONS ON MAGNETICS. 47(10). p.3845-3848
abstract
A widely applied method for simulating the induced eddy currents in biological tissues is the Impedance Method (IM). This method has recently been extended to the Independent Impedance Method (IIM), which identifies and solves a linear system of independent equations, resulting in acceleration of computations. Both IM and IIM assume isotropic material properties, even though some tissues have directionally dependent characteristics. Therefore, we formulate IIM towards spacedependent anisotropic material properties. In this paper, the method is applied to the simulation of Transcranial Magnetic Stimulation (TMS) for both isotropic and anisotropic spherical head models. The numerical results show that anisotropy has a non-negligible effect on the induced currents, yielding maximum differences of about 40% in the skull and 19% in gray matter. The method is validated by comparing the results with Finite Element Method (FEM) solutions. This study leads to a more realistic numerical modeling of the eddy currents due to the incorporation of anisotropy.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
MRI, COMPUTATION, FIELDS, TRANSCRANIAL MAGNETIC STIMULATION, BRAIN, Anisotropy, eddy currents, independent impedance method (IIM), transcranial magnetic stimulation (TMS)
journal title
IEEE TRANSACTIONS ON MAGNETICS
IEEE Trans. Magn.
volume
47
issue
10
pages
3845 - 3848
conference name
Conference on International Magnetics (INTERMAG)
conference location
Taipei, Taiwan
conference start
2011-04-25
conference end
2011-04-29
Web of Science type
Proceedings Paper
Web of Science id
000296418200392
JCR category
ENGINEERING, ELECTRICAL & ELECTRONIC
JCR impact factor
1.363 (2011)
JCR rank
94/244 (2011)
JCR quartile
2 (2011)
ISSN
0018-9464
DOI
10.1109/TMAG.2011.2145361
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1209670
handle
http://hdl.handle.net/1854/LU-1209670
date created
2011-04-18 10:03:08
date last changed
2016-12-19 15:45:12
@article{1209670,
  abstract     = {A widely applied method for simulating the induced eddy currents in biological tissues is the Impedance Method (IM). This method has recently been extended to the Independent Impedance Method (IIM), which identifies and solves a linear system of independent equations, resulting in acceleration of computations. Both IM and IIM assume isotropic material properties, even though some tissues have directionally dependent characteristics. Therefore, we formulate IIM towards spacedependent anisotropic material properties. In this paper, the method is applied to the simulation of Transcranial Magnetic Stimulation (TMS) for both isotropic and anisotropic spherical head models. The numerical results show that anisotropy has a non-negligible effect on the induced currents, yielding maximum differences of about 40\% in the skull and 19\% in gray matter. The method is validated by comparing the results with Finite Element Method (FEM) solutions. This study leads to a more realistic numerical modeling of the eddy currents due to the incorporation of anisotropy.},
  author       = {De Geeter, Nele and Crevecoeur, Guillaume and Dupr{\'e}, Luc},
  issn         = {0018-9464},
  journal      = {IEEE TRANSACTIONS ON MAGNETICS},
  keyword      = {MRI,COMPUTATION,FIELDS,TRANSCRANIAL MAGNETIC STIMULATION,BRAIN,Anisotropy,eddy currents,independent impedance method (IIM),transcranial magnetic stimulation (TMS)},
  language     = {eng},
  location     = {Taipei, Taiwan},
  number       = {10},
  pages        = {3845--3848},
  title        = {Eddy-current simulations using an independent impedance method in anisotropic biological tissues},
  url          = {http://dx.doi.org/10.1109/TMAG.2011.2145361},
  volume       = {47},
  year         = {2011},
}

Chicago
De Geeter, Nele, Guillaume Crevecoeur, and Luc Dupré. 2011. “Eddy-current Simulations Using an Independent Impedance Method in Anisotropic Biological Tissues.” Ieee Transactions on Magnetics 47 (10): 3845–3848.
APA
De Geeter, N., Crevecoeur, G., & Dupré, L. (2011). Eddy-current simulations using an independent impedance method in anisotropic biological tissues. IEEE TRANSACTIONS ON MAGNETICS, 47(10), 3845–3848. Presented at the Conference on International Magnetics (INTERMAG).
Vancouver
1.
De Geeter N, Crevecoeur G, Dupré L. Eddy-current simulations using an independent impedance method in anisotropic biological tissues. IEEE TRANSACTIONS ON MAGNETICS. 2011;47(10):3845–8.
MLA
De Geeter, Nele, Guillaume Crevecoeur, and Luc Dupré. “Eddy-current Simulations Using an Independent Impedance Method in Anisotropic Biological Tissues.” IEEE TRANSACTIONS ON MAGNETICS 47.10 (2011): 3845–3848. Print.