Finite difference time domain (FDTD) method for modeling the effect of switched gradients on the human body in MRI

Magnetic Resonance in Medicine

Volumn 48, Issue 6, 2002, Pages 1037-1042

  Zhao, Huawei ^a   Crozier, Stuart ^a   Liu, Feng ^a  

^a UNIVERSITY OF QUEENSLAND   (Australia)

Author keywords

Eddy current; FDTD method; Gradient coil; Low frequency electromagnetic wave; Peripheral nerve stimulation

Indexed keywords

EDDY CURRENTS; ELECTRIC FIELDS; ELECTROMAGNETIC WAVES; FINITE DIFFERENCE TIME DOMAIN METHOD;

COMPUTATIONAL PROBLEM; FREQUENCY INDEPENDENT; GRADIENT COIL; HIGH SPATIAL RESOLUTION; INDUCED ELECTRIC FIELDS; LOW-FREQUENCY ELECTROMAGNETIC WAVES; PERIPHERAL NERVES; PULSED FIELD GRADIENTS;

TIME DOMAIN ANALYSIS;

ARTICLE; COMPUTER SIMULATION; ELECTROMAGNETIC FIELD; HUMAN; MAGNETIC FIELD; MATHEMATICAL ANALYSIS; MODEL; NERVE STIMULATION; NUCLEAR MAGNETIC RESONANCE IMAGING; PERIPHERAL NERVE; TIME;

EID: 0036892903     PISSN: 07403194     EISSN: None     Source Type: Journal    
DOI: 10.1002/mrm.10313     Document Type: Article

References (17)

1. Furse CM, Gandhi OP. Calculation of electric fields and currents induced in a millimeter-resolution human model at 60 Hz using the FDTD method. Bioelectromagnetics 1998;19:293-299.
2. Parkinson WC. Electromagnetic fields in biological studies. Ann Biomed Eng 1985;3:491-514.
3. Reilly JP. Peripheral nerve stimulation by induced electric currents: Exposure to time-varying magnetic fields. Med Biol Eng Comput 1989;27:101-110.
4. Mouchawar GA, Nyenhhuis JA, Geddes LA. Magnetic stimulation of excitable tissue: Calculation of induced eddy-currents with a three-dimensional finite element model. IEEE Trans Magn 1993;29:3355-3357.
5. Irnich W, Schmitt F. Magnetostimulation in MRI. Magn Reson Med 1995;33:619-623.
6. Bowtell R, Bowley RM. Analytic calculations of the E-fields induced by time-varying magnetic fields generated by clindrical gradient coils. Magn Reson Med 2000;44:782-790.
7. Yee S. Numerical solution of initial boundary value problems involving Maxwell's equations in isotropic media. IEEE Trans Antennas Propagat 1966;14:302-307.
8. Umashankar K, Taflove A. A novel method to analyze electromagnetic scattering of complex objects. IEEE Trans Electromagn Compat 1982;24:397-405.
9. Holland R. Finite-difference time-domain (FDTD) analysis of magnetic diffusion. IEEE Trans Electromagn Compat 1994;36:32-39.
10. Moerloose JD, Dawson TW, Stuchly MA. Application of the finite difference time domain algorithm to qusi-static field analysis. Radio Sci 1997;32:329-341.
11. Collins CM, Li S, Smith MB. SAR and B1 field distributions in a heterogeneous human head model within a birdcage coil. Magn Reson Med 1998;40:847-856.
12. Ibrahim TS, Lee R, Baertlein BA. Computational analysis of the high pass birdcage resonator: Finite difference time domain simulations for high-field MRI. Concepts Magn Reson 2000;18:835-843.
13. Zhao H, Crozier S, Liu F. A high definition, finite difference time domain (HD-FDTD) method. Appl Math Model 2002. in press.
14. Berenger JP. A perfectly matched layer for the absorption of electromagnetic waves. J Comput Phys 1994;114:185-200.
15. Dudley DG. Mathematical Foundations for Electromagnetic Theory, IEEE Press Series on Electromagnetic Waves. IEEE. New York; 1994.
16. Waldschmidt G, Taflove A. The determination of the effective radius of a filamentary source in the FDTD mesh. IEEE Microwave Guided Wave Lett 2000;10:217-219.
17. Keltner JR, Carlson JW, Roos MS, Wong STS, Wong TL, Budinger TF. Electromagnetic fields of surface coil in vivo NMR at high frequencies. Magn Reson Med 1991;22:467-480.