Solusi Numerik Distribusi Spesific Absorption Rate (SAR) pada Kulit, Jaringan Lemak dan Otot menggunakan metode Finite Difference Time Domain (FDTD)

M.Arief Dian Ramadan, Tasrief Surungan, Eko Juarlin

Abstract


Studi numerik mengenai penjalaran gelombang elektromagnetik yang berinteraksi dengan  jaringan biologis tubuh manusia telah dilakukan. Tingkat energi gelombang elektromagnetik yang diserap oleh kulit, lemak dan otot dapat dihitung dari penjalaran dan interaksi gelombang terhadap medium tersebut yang dipresentasikan oleh distribusi Specific Absoption Rate (SAR). Penelitian ini bertujuan untuk menghitung distribusi Specific Absoption Rate (SAR) pada kulit,  jaringan lemak dan otot manusia menggunakan metode Finite Difference Time Domain satu dimensi ( FDTD 1-D) mode transfer magnetik (TM). FDTD adalah metode yang baik untuk menghitung penyerapan energi elektromagnetik , perhitungan SAR berdasarkan parameter konduktansi ,permitivitas dan permeabilitas setiap jaringan tubuh dengan urutan konfigurasi udara, kulit, jaringan lemak dan otot.  Penelitian ini menggunakan aplikasi SCILAB dan hasil simulasi menunjukkan bahwa distribusi SAR dari konfigurasi udara-kulit dan konfigurasi lemak-otot mengalami peningkatan,sedangkan distribusi SAR pada konfigurasi kulit-lemak mengalami pelemahan. Ketika gelombang elektromagnetik  mendekati medium berikutnya distribusi SAR meningkat akibat refleksi gelombang oleh medium kulit dan otot. Tingkat penyerapan gelombang elektromagnetik sebanding dengan distribusi SAR setiap jaringan tubuh manusia yang bergantung pada konduktansi dan densitas massa jaringan. Semakin besar konduktansi dan densitas massa suatu jaringan tubuh maka distribusi SAR pada jaringan tersebut semakin besar dan begitu pula sebaliknya.

Kata Kunci: Kulit, Jaringan Lemak, FDTD, Distribusi SAR

 

Numerical study obout propogation of electromagnetic waves that interact with biological tissue have been caried out. The energy of electromagnetic waves absorbed by the skin,fat and muscle can be calculated from the propagation and interaction of waves are shown Specific Absorption Rate (SAR) distribution. In this study, we propose calculated Specific Absorption Rate SAR distribution in the skin, human fat tissue and muscle using method Finite Difference Time Domain  (FDTD)  for the transverse magnetik (TM) mode of 1D-Maxwell’s equation. The FDTD method is employed in calculating  the absoption of electromagnetic energy, there is analises based of conductance, pemitivity, and permeabilty parameters for each human  tissue model skin, fat and muscle. In this work, simulation are carried out using SCILAB and numerical result are shown that SAR distribution  of air-skin configuration and fat-muscle cofiguration is increase of level SAR, while SAR distribution  of skin-fat is decrease of level SAR. When the elctromagnetic wave are close to interface of next medium, the SAR distribution are increase by effect reflection wave from medium skin and muscle. The level of electromagnetic absorption wave are proportional to SAR distribution in the human tissue that based of conductance and mass density. The greater of conductance and mass density of human tissue, the greater the distribution of SAR, and vice verca.

Keywords: Skin, Fat, FDTD, SAR Distribution


Full Text:

PDF

References


N. Kitzunezaki, and A. Okabe, High-order correction to The FDTD Method Based on Integral form Maxwell Equations, Computer Physics Communication, vol 185, 2014, pp. 1582-1588

M.J Jenkinson, and J.W Banks, High-Order Accurate FDTD Schemes for Dispersive Maxwell Equation in Second-Order Form Using Recursive Convlutions, Journal of Computationa and Applied Mathematics. vol. 336, 2018, pp. 192-218,.

H.Z. Alisoy, dan B. B Alagoz, An FDTD Based Numerical Analysis of Microwave Propogation Properties in A Skin-Fat Tissue Layer, Optik-International Journal for Light and Electron Optics. vol. 124, no. 21, 2014, pp. 5218-5224.

S.D. Gedney, Introduction to The Finite-Difference Time Domain (FDTD) Methode for Electromagnetics, Morgan & Claypool Publisher, 2010.

Y.Zhou, H. Liang, and J. Cai, Efficient Scheme for Maxwell’s Equation with PEC Boundary Condition, Optik. vol. 174, 2018, pp.339-346.

D. M. Sullivan. Electromagnetic Simulation Using The FDTD Methode. IEEE Press, 2000.

A. Taflove. Computatational Electrodynamics: The Finite-Difference Time-Domain Methode. Artech House, 1995.

D. M Sullivan, D. T Borup, and O. P. Gandhi, Use of The Finite Difference Time-domain Methode in Calculating EM Absorption in Human Tissues, IEEE, vol. BME-34, no. 2, 1987, pp. 146-157.

S. K Kamepally, B. P Kumar, and C. S Paidimarry, FDTD Estimation for Accurate Specific Absorption Rate in a Tumor, International Conference on Moicroelectronics, Comunication and Renewable Energy (ICMiRCR, 2013.


Article Metrics

Abstract view : 9 times | PDF view : 4 times

Refbacks

  • There are currently no refbacks.