Electromagnetic and thermal simulations of 3-D human head model under RF radiation by using the FDTD and FD approaches

Author

Lu, Yilong ; Ying, Jianling ; Tan, Tak-Kee ; Arichandran, K.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

1653

Lastpage

1656

Abstract

Presents computer simulations of electromagnetic (EM) absorption and the associated thermal effects in a realistic 3-D human head model under radio frequency (RF) radiation. The 3-D human head model is generated from a set of magnetic resonance imaging (MRI) anatomical slices. Maxwell´s equations are solved to obtain the harmonic electric field and heat potential by using the finite difference time domain (FDTD) method. From the heat potentials, the steady state biological heat transfer equation is solved by using the finite difference (FD) method. From the simulation results under Dirichlet boundary condition, noticeable temperature rise was observed in the head model under RF plane wave radiation at 1 GHz, with power density of 10 mW/cm² (the previous US safety standard)

Keywords

Maxwell equations; biothermics; digital simulation; electromagnetic wave absorption; finite difference time-domain analysis; physiological models; radiofrequency heating; 1 GHz; 3D human head model; Dirichlet boundary condition; RF radiation; computer simulations; electromagnetic simulations; harmonic electric field; heat potential; magnetic resonance imaging anatomical slices; steady state biological heat transfer equation; thermal simulations; Biological system modeling; Electromagnetic modeling; Electromagnetic radiation; Finite difference methods; Heat transfer; Humans; Magnetic heads; Magnetic resonance imaging; Maxwell equations; Radio frequency;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.497572

Filename

497572