Back
 JBiSE  Vol.9 No.9 , August 2016
Electromagnetic and Thermal Simulations of Human Neurons for SAR Applications
Abstract: The impact of the electromagnetic waves (EM) on human neurons (HN) has been under investigation for decades, in efforts to understand the impact of cell phones (radiation) on human health, or radiation absorption by HN for medical diagnosis and treatment. Research issues including the wave frequency, power intensity, reflections and scattering, and penetration depths are of important considerations to be incorporated into the research study. In this study, computer simulation for the EM exposure to HN was studied for the purpose of determining the upper limits of the electric and magnetic field intensities, power consumption, reflections and transmissions, and the change in temperature resulting from the power absorption by human neurons. Both high frequency structural simulators (HFSS) from ANSYS software, and COMSOL multi-physics were used for the simulation of the EM transmissions and reflections, and the temperature profile within the cells, respectively. For the temperature profile estimation, the study considers an electrical source of 0.5 watt input power, 64 MHz. The EM simulation was looking into the uniformity of the fields within the sample cells. The size of the waveguide was set to be appropriate for a small animal model to be conducted in the future. The incident power was fully transmitted throughout the waveguide, and less than 1% reflections were observed from the simulation. The minimum reflected power near the sample under investigation was found to be with negligible reflected field strengths. The temperature profile resulting from the COMSOL simulation was found to be near 0.25 m°K, indicating no change in temperature on the neuro cells under the EM exposure. The paper details the simulation results for the EM response determined by HFSS, and temperature profile simulated by COMSOL.
Cite this paper: Perez, F. , Millholland, G. , Peddinti, S. , Thella, A. , Rizkalla, J. , Salama, P. , Rizkalla, M. , Morisaki, J. and Rizkalla, M. (2016) Electromagnetic and Thermal Simulations of Human Neurons for SAR Applications. Journal of Biomedical Science and Engineering, 9, 437-444. doi: 10.4236/jbise.2016.99039.
References

[1]   Aitken, R.J., et al. (2005) Impact of Radio Frequency Electromagnetic Radiation on DNA Integrity in the Male Germline. International Journal of Andrology, 28, 171-179.
http://dx.doi.org/10.1111/j.1365-2605.2005.00531.x

[2]   Rosch, P.J. and Markov, M.S. (2004) Bioelectromagnetic Medicine. Informa Healthcare, New York.

[3]   Kovacs, G. and Sorger, J. (2005) Interactions of Electromagnetic Waves with Biological Tissue. BIOE 200C Spring.
http://personal.stevens.edu/~bmcnair/BME322-S10/Class%2012.pdf

[4]   Kesari, K.K., et al. (2013) Cell Phone Radiation Exposure on Brain and Associated Biological Systems. Indian Journal of Experimental Biology, 51, 187-200.

[5]   Bernardi, P., et al. (2000) Specific Absorption Rate and Temperature Increases in the Head of a Cellular-Phone User. IEEE Transactions on Microwave Theory and Techniques, 48, 1118-1126.
http://dx.doi.org/10.1109/22.848494

[6]   Pickard, W.F., Straube, W.L. and Moros, E.G. (2000) Experimental and Numerical Determination of SAR Distributions within Culture Flasks in a Dielectric Loaded Radial Transmission Line. IEEE Transactions on Biomedical Engineering, 47, 202-208.
http://dx.doi.org/10.1109/10.821756

[7]   Krawczyk, A., Sobiech, J. and Sedek, E. (2008) Model for Investigation of Microwave Energy Absorbed by Young and Mature Living Animals. Electromagnetic Field, Health and Environment, 29, 126-132.

[8]   Brenner, D.J., et al. (2003) Cancer Risks Attributable to Low Doses of Ionizing Radiation: Assessing What We Really Know. Proceedings of the National Academy of Sciences, 100, 13761-13766.
http://dx.doi.org/10.1073/pnas.2235592100

[9]   Vecchia, P., et al. (2009) Exposure to High Frequency Electromagnetic Fields, Biological Effects and Health Consequences (100 kHz - 300 GHz). International Commission on Non-Ionizing Radiation Protection.
http://www.emf.ethz.ch/archive/var/ICNIRP_effekte_RFReview.pdf

 
 
Top