zastosowania elektromagnetyzmu w nowoczesnych ... - PTZE

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28 XVIII Sympozjum <strong>PTZE</strong>, Zamość 2008 4. de Munk J.C., Faes T.J.C., Heethaar R.M., The Boundary Element Method in the Forward and Inverse Problem of Electrical Impedance Tomography, IEEE Transactions on Biomedical Engineering, Vol. 47, No. 6, pp.792-800, June 2000. 5. Osher S., Santosa F., Level set methods for optimization problems involving geometry and constraints, Journal of Comput. Physics 171, pp.272-288, 2001 6. Saulnier G.J., Blue R. S., Newell J. C., Isaacson D., Edic P. M., Electrical Impedance Tomography, IEEE Signal Processing Magazine, pp.31-43, November 2001. 7. Sethian J.A., Level Set Methods and Fast Marching Methods. Cambridge University Press, 1999
XVIII Sympozjum <strong>PTZE</strong>, Zamość 2008 CALCULATION OF SAR IN BIOLOGICAL OBJECTS WITH DIFFERENT PARAMETERS Introduction Katarzyna Ciosk Kielce University of Technology, Poland The use of wireless personal communication devices, especcialy cellular telephones has increased rapidly during last decade. Cellular communication systems require the use of many base stations located throughout a service area and it is necessary to install antenas on residential and public buildings. Hence, a general public concern about possible electromagnetic hazards coming from these wireless communication sources has emerged in the last years. The SAR (Specific Absorption Rate) coefficient is recommended as parameter to determine the energy absorbed by the body exposed to electromagnetic field. The SAR takes into account the incient electromagnetic field parameters and also parameters of the body subjected to electromagnetic field. Value of SAR depends on the incident field parameters such the intensity, polarization [1] and frequency [2]. The absorption of electromagnetic field depends also on parameters of object such as size, shape and orientation. SAR is higher when the body is more perpendicular than parallel to an incident field. It is also higher when the cross section of the body perpendicular to the incident magnetic field is larger. The aims of this study is to analyse the influence of the body shape and electrical properties on whole body SAR in spheroidal biological object shown in Fig.1. Method of calculation E H Fig. 1. Schematic diagram of spheroidal model To trace the influence of body properties on the value of the whole-body SAR the calculations were made. The values of the SAR were calculated based on the calculating of the electric field strength distribution inside the body. The model as a prolate spheroid with major axis x k z y 29
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