An improved quasi-static finite-difference scheme for induced field evaluation based on the biconjugate gradient method

Wang, Hua, Liu, Feng, Trakic, A. and Crozier, S. (2008) An improved quasi-static finite-difference scheme for induced field evaluation based on the biconjugate gradient method. IEEE Transactions on Biomedical Engineering, 55 7: 1800-1808. doi:10.1109/TBME.2008.919877


Author Wang, Hua
Liu, Feng
Trakic, A.
Crozier, S.
Title An improved quasi-static finite-difference scheme for induced field evaluation based on the biconjugate gradient method
Journal name IEEE Transactions on Biomedical Engineering   Check publisher's open access policy
ISSN 0018-9294
Publication date 2008-07-01
Year available 2008
Sub-type Article (original research)
DOI 10.1109/TBME.2008.919877
Open Access Status Not yet assessed
Volume 55
Issue 7
Start page 1800
End page 1808
Total pages 9
Editor J.C. Principe
Place of publication Piscataway NY, USA
Publisher IEEE
Language eng
Subject C1
970109 Expanding Knowledge in Engineering
090399 Biomedical Engineering not elsewhere classified
Abstract This paper presents a biconjugate gradient (BiCG) method that can significantly improve the performance of the quasi-static finite-difference scheme, which has been widely used to model field induction phenomena in voxel phantoms. The proposed BiCG method offers remarkable computational advantages in terms of convergence performance and memory consumption over the conventional iterative, successive overrelaxation algorithm. The scheme has been validated against other known solutions on a lossy, multilayered ellipsoid phantom excited by an ideal coil loop. The wide application capability and computational performance of the BiCG method is demonstrated by modeling the exposure of MRI healthcare workers to fields produced by pulsed field gradients. This is an important topic of research in light of the Physical Agents Directive 2004/40/EC because a variety of realistic operator postures near the bore entrance of an MRI system are modeled.
Keyword Biconjugate gradient (BiCG) method
MRI
quasi-static finite-difference (QSFD)
successive overrelaxation (SOR)
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Information Technology and Electrical Engineering Publications
 
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