Induced current densities from low-frequency magnetic fields in a 2 mm resolution, anatomically realistic model of the body.

This paper presents calculations of current density in a fine-resolution (2 mm) anatomically realistic voxel model of the human body for uniform magnetic fields incident from the front, side and top of the body for frequencies from 50 Hz to 10 MHz. The voxel phantom, NORMAN, has a height of 1.76 m and a mass of 73 kg. There are 8.3 million voxels in the body differentiated into 37 tissue types. Both the impedance method and the scalar potential finite difference method were used to provide mutual corroboration. Results are presented for the current density averaged over 1 cm2 in muscle, heart, brain and retina.

[1]  P. Dimbylow,et al.  The calculation of induced currents and absorbed power in a realistic, heterogeneous model of the lower leg for applied electric fields from 60 Hz to 30 MHz. , 1988, Physics in medicine and biology.

[2]  R. W. Lau,et al.  The dielectric properties of biological tissues: II. Measurements in the frequency range 10 Hz to 20 GHz. , 1996, Physics in medicine and biology.

[3]  O. Gandhi,et al.  A 3-D impedance method to calculate power deposition in biological bodies subjected to time varying magnetic fields , 1988, IEEE Transactions on Biomedical Engineering.

[4]  O. Gandhi,et al.  Induced electric currents in models of man and rodents from 60 Hz magnetic fields , 1994, IEEE Transactions on Biomedical Engineering.

[5]  B. Hutzler,et al.  Magnetically induced currents in the human body , 1996 .

[6]  Maria A. Stuchly,et al.  Comparison of magnetically induced elf fields in humans computed by FDTD and scalar potential FD codes , 1996, 1996 Symposium on Antenna Technology and Applied Electromagnetics.

[7]  Icrp Human Respiratory Tract Model for Radiological Protection , 1994 .

[8]  C Gabriel,et al.  The dielectric properties of biological tissues: I. Literature survey. , 1996, Physics in medicine and biology.

[9]  P. Dimbylow FDTD calculations of the whole-body averaged SAR in an anatomically realistic voxel model of the human body from 1 MHz to 1 GHz. , 1997, Physics in medicine and biology.

[10]  R. W. Lau,et al.  The dielectric properties of biological tissues: III. Parametric models for the dielectric spectrum of tissues. , 1996, Physics in medicine and biology.

[11]  Hiroshi Kanai,et al.  Impedence Method for Calculation of Power Deposition Patterns in Magnetically Induced Hyperthermia , 1984, IEEE Transactions on Biomedical Engineering.