An improved hybrid MoM/FDTD technique for MRI RF coils modeling using Huygen's equivalent surface method

Li, B. K., Liu, F., Weber, E., Padhi, S. and Crozier, S. (2007). An improved hybrid MoM/FDTD technique for MRI RF coils modeling using Huygen's equivalent surface method. In: A. Dittmar and J. Clark, Proceedings of the 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2007), Lyon, France, (3898-3901). 23-26 August 2007. doi:10.1109/IEMBS.2007.4353185


Author Li, B. K.
Liu, F.
Weber, E.
Padhi, S.
Crozier, S.
Title of paper An improved hybrid MoM/FDTD technique for MRI RF coils modeling using Huygen's equivalent surface method
Conference name 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2007)
Conference location Lyon, France
Conference dates 23-26 August 2007
Proceedings title Proceedings of the 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society   Check publisher's open access policy
Journal name 2007 Annual International Conference of the Ieee Engineering in Medicine and Biology Society, Vols 1-16   Check publisher's open access policy
Place of Publication Piscataway, NJ, U.S.A.
Publisher IEEE - Institute of Electrical Electronics Engineers Inc.
Publication Year 2007
Sub-type Fully published paper
DOI 10.1109/IEMBS.2007.4353185
ISBN 978-1-4244-0787-3
ISSN 1557-170X
Editor A. Dittmar
J. Clark
Start page 3898
End page 3901
Total pages 4
Collection year 2008
Language eng
Abstract/Summary In this work, an improved hybrid MoM/FDTD algorithm for modeling low to ultra high field MRI RF coil/sample interactions has been proposed. In our previous hybrid MoM/FDTD method, the accuracy of modeling MRI RF coils is generally hindered by two major issues, staircasing errors and rough approximation of the coil current distortions by electromagnetic reflections from sample. In view of this, a Huygen's equivalent surface method has been proposed to effectively bridge MoM and FDTD. In the improved hybrid MoM/FDTD algorithm, staircasing errors are eliminated, and most importantly the complex coil/tissue interactions are explicitly accounted for. The accuracy of the improved hybrid MoM/FDTD method is numerically verified with a well established hybrid Green function/MoM solution and also experimentally underpinned with MR images obtained using a prototype rotary phased array head coil.
Subjects E1
291500 Biomedical Engineering
671402 Medical instrumentation
Keyword Hybrid MoM/FDTD algorithm
Huygen's equivalent surface method
Green function
MR images
Electromagnetic reflections
Q-Index Code E1
Q-Index Status Confirmed Code

 
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Created: Fri, 11 Apr 2008, 16:50:03 EST by Donna Clark on behalf of School of Information Technol and Elec Engineering