DocumentCode :
1234168
Title :
A 3-D hp Finite/Infinite Element Method to Calculate Power Deposition in the Human Head
Author :
Xue, Dong ; Demkowicz, Leszek ; Hao, Ling
Author_Institution :
Dept. of Aerosp. Eng. & Eng. Mech., Univ. of Texas, Austin, TX
Volume :
54
Issue :
4
fYear :
2007
fDate :
4/1/2007 12:00:00 AM
Firstpage :
734
Lastpage :
741
Abstract :
The electromagnetic power deposition and transfer properties of a G1 continuous head model reconstructed from magnetic resonance imaging (MRI) data are investigated by using the coupled hp finite/infinite element (FE/IE) method. The discretization error is controlled by a self-adaptive process driven by an explicit a posteriori error estimate. Based on the benchmark problem of reproducing the Mie series solution, the scattering of a plane wave on the curvilinear head model is used to evaluate the hp FE/IE approach and calibrate the error bound. The radiation pattern from a short dipole antenna modeling a cell phone, is analyzed in terms of the level and distribution of the specific absorption rates (SAR). The numerical experiments show that the hybrid hp FE/IE implementation is a competitive tool for accurate assessment of human electromagnetic exposure
Keywords :
Mie scattering; biomedical MRI; error analysis; finite element analysis; image reconstruction; medical image processing; physiological models; 3-D hp finite/infinite element method; G1 continuous head model; Mie series; a posteriori error estimate; cell phone; curvilinear head model; discretization error; electromagnetic power deposition; error bound calibration; image reconstruction; magnetic resonance imaging; plane wave scattering; self-adaptive process; specific absorption rates; Antenna radiation patterns; Electromagnetic coupling; Electromagnetic modeling; Electromagnetic scattering; Error correction; Image reconstruction; Magnetic heads; Magnetic properties; Magnetic resonance imaging; Mie scattering; Adaptive meshing; electromagnetic (EM) scattering; finite/infinite element (FE/IE) method; human head model; specific absorption rate (SAR); Brain; Cellular Phone; Computer Simulation; Energy Transfer; Finite Element Analysis; Head; Humans; Imaging, Three-Dimensional; Microwaves; Models, Biological; Radiation Dosage; Radiometry; Relative Biological Effectiveness; Risk Assessment; Risk Factors;
fLanguage :
English
Journal_Title :
Biomedical Engineering, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9294
Type :
jour
DOI :
10.1109/TBME.2006.889177
Filename :
4132949
Link To Document :
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