The Attenuation Calculation of the Energy Signal of a Gaussian Pulse Propagating in the Human Body to Detect the Heart Beat


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Abstract


This work is part of a project whose goal is the study of abnormal attenuation and distortion of the Ultra Wide Band signal "UWB" during its propagation in the human body to detect heart beats. This paper describes a method to determine the attenuation of the signal energy through the region of the body in the heart area; this region is modelled like the superposition of four semi-infinite layers, each characterized by its thickness, conductivity and dielectric constant. This method consists in seeking attenuation in biological samples of the same type as the layers forming the human body. Hence we deduce the overall attenuation in the total model. A comparison is made with other work that exists in the literature to show the robustness of our method. We adopt the FDTD method "Finite Difference Time Domain" to simulate the propagation of a Gaussian pulse whose pulse width varies from 1 to 10 GHz in these biological media. These samples should not be too thin not to have any energy fluctuation area along the sample, or too large not to risk dampening the signal especially for very short pulses. For this, we select 2.5 cm wide samples located 1 cm from the source (antenna).
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Keywords


Attenuation; Finite Difference Time Domain (FDTD); Ultra Wide Band (UWB) Wave

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References


D. Gorinevsky, S. Boyd, and G. Stein, Design of Low-Bandwidth Spatially Distributed Feedback, IEEE Transactions on Automatic Control, Vol. 53(Issue 1):257-272, February 2008.

Lazaro A., Girbau D., and Villarino R., "Analysis of vital signs monitoring using an IR-UWB radar, Progress In Electromagnetics Research, Vol. 100, 265-284, 2010.

Staderini, M. UWB Radars in Medicine. IEE AESS Systems Magazine 2000, 1, 1-10.

Thiel, F.; Hein, M.. Schwarz, U.; Sachs, J.; Seifert, F. Combining magnetic resonance imaging and ultra wide band radar: A new concept for multimodal biomedical imaging REVIEW OF SCIENTIFIC INSTRUMENTS, 2009, 80, 014302

Bilich, C. G. UWB Radars for Bio-Medical Sensing: Attenuation Model for Wave Propagation in the Body at 4 GHz. Informatica e Telecomunicazioni, Technical Report DIT-06-051University of Trento.

Chang, Y.J, The NPAC Visible Human. Viewer, Syracuse University, NY.

Gabriel, C. Compilation of the Dielectric Properties of Body Tissues at RF and Microwave Frequencies, Physics Department, King’s College London, London WC2R2LS, UK; Armstrong Laboratory (AFMC), Occupational and Environmental Health Directorate, Radiofrequency Radiation Division. Report: AOE-TR- 1996-0037.

Balanis, C. Advanced Engineering Electromagnetics. John Wiley & Sons; USA, 1989; ch. 5.

Dennis M. Sullivan. Electromagnetic simulation using the FDTD method, IEEE Press Series on RF and Microwave Technology, Roger D, Pollard and Richard Booton, Series Editors, 2000.

Dennis M. S.; Jacek, N. A Z-Transform Matrix Formulation for a Tensor FDTD Method, Antennas and Propagation Society International Symposium, 2007 1-4244-0878-4/07

Mur, G. Absorbing boundary conditions for the finite-difference approximation of time domain electromagnetic field equations, IEEE Trans. Electromagen. 1981, 23, 377-384

Chaoui. M, Ketata. M, Lahiani. M, Ghariani. H,. FDTD Simulation Method Using Double Signals for Electromagnetic Field: Determination of the Tissue Biological Characteristics, International Review on Computers and Software (I.RE.CO.S.), 2011, 6,. 6

Dielectric Properties of Body Tissues,.http://niremf.ifac.cnr.it/tissprop/htmlclie/htmlclie.htm (acced18/12/2012)


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