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1 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 16 Jul.; 27(7), ISSN (Print)ISSN (Online) 2D Microwave Image Reconstruction of Breast Cancer Detection for Breast Types 김기채 김태홍 이종문 전순익 백정기 Ki-Chai KimTae-Hong Kim*Jong-Moon Lee**Soon-Ik Jeon**Jeong-Ki Pack*** 요약 2. 16/, 1,7 MHz 4 (ED-, HD-, SC-, FT-type)., simplex., ED HD, SC FT. Abstract This paper presents a tumor detection for breast cancer that utilizes two-dimensional(2d) image reconstruction with microwave tomographic imaging. The breast cancer detection system under development consists of 16 transmit/receive antennas, and the microwave tomography system operates at 1,7 MHz. The four types of breast(ed-, HD-, SC-, and FT-type) are used for image reconstruction. To solve a 2D inverse scattering problem, the method of moments(mom) is employed for forward problem solving, and the simplex method employed as an optimization algorithm. The results of the reconstructed image show that the ED- and HD-types of breasts are well reconstructed, but SC- and FT-type breasts are not well because of the error including. Key words: Breast Cancer Detector, Microwave Tomography, Image Reconstruction. 서론,.. [1][8], 2 [ , MT ]. (Department of Electrical Engineering, eungnam University) *(School of Mechanical Engineering, GIST) **(Radio Technology Research Department, ETRI) ***(Department of Radio Science & Engineering, Chungnam University) Manuscript received May 9, 16 ; Revised June 21, 16 ; Accepted July 18, 16. (ID No. 9-) Corresponding Author: Ki-Chai Kim ( 646 c Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved.

2 9 MHz [9]. MHz3 GHz,,.,.,. [9] 4, (1) ED-type(Extremely Dense- type), (2) HD-type(Heterogeneously Dense-type), (3) SC- type(scattered-type), (4) FT-type(Fatty-type), 1,7 MHz. 2,, 4.. 순방향및역방향문제해석 1 2., 1 [9]. 그림 1. Fig. 1. Incident electric fields and scattered fields for the inverse scattering problem. (2),, 2 Hankel. 1,, ( L M),.. (3) (4) (1) (),. (1), (2), [9]. 647

3 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 7, Jul. 16. min (6),.. 순방향및역방향문제해석 ED, HD, SC, FT 4, 1,7 MHz 1. ETRI 그림 Fig. 2. Layout of 16 antennas and tissues. ED-Type 17 MHz, Permittivity 7 ED-Type 17 MHz, Permittivity 8 y Permittivity x (a-1) Permittivity y x (a-2) Permittivity ED-Type 17 MHz, Conductivity.8 ED-Type 17 MHz, Conductivity Conductivity (b-1) Conductivity.2.1 (b-2) Conductivity 그림 3. ED-type (1,7 MHz). Fig. 3. Reconstructed permittivity and conductivity of ED-type breast at 1,7 MHz. 648

4 표 1. Table 1. Electrical properties of tissues used for image reconstruction. Relative permittivity Conductivity (S/m) Bath Fat Tumor(water) ED-type HD-type SC-type.9.94 FT-type , 8-mm Tumor 2. /() cm 16, 1,7 MHz cm 18(: cm). 3.. (reflection), (expansion), (contraction), (reduction),. 3 ED- HD-Type 17 MHz, Permittivity 8 HD-Type 17 MHz, Permittivity 7 Permittivity 8 (a-1) Permittivity (a-2) Permittivity HD-Type 17 MHz, Conductivity.6 HD-Type 17 MHz, Conductivity Conductivity (b-1) Conductivity (b-2) Conductivity 그림 4. HD-type (1,7 MHz) Fig. 4. Reconstructed permittivity and conductivity of HD-type breast at 1,7 MHz. 649

5 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 7, Jul. 16. type, 4 HD-type, SC-type (a-1, a-2) (b-1, b-2). 3 4, ED-type HD- type.,, SC-type fat tumor, tumor., FT-type SC-type fat tumor, tumor. 3, ED-type tumor. SC-type FT-type tumor, FTtype ED-type,., (a-1) Permittivity (a-2) Permittivity (b-1) Conductivity (b-2) Conductivity 그림. SC-type (1,7 MHz) Fig.. Reconstructed permittivity and conductivity of SC-type breast at 1,7 MHz. 6

6 .. 결론 4 1,7 MHz., ED-type HD-type, ED-type SC-type FT-type. References [1] P. M. Meaney, K. D. Paulsen, and T. P. Ryan, "Twodimensional hybrid element image reconstruction for TM illumination", IEEE Trans. Ant. and Prop., vol. 43, pp , 199. [2] S. C. Hagness, A. Taflove, and J. E. Bridges, "Twodimensional FDTD analysis of a pulsed microwave confocal system for breast cancer detection: Fixed-focus and antenna-array sensors", IEEE Trans. Biomed. Eng., vol. 4, no. 12, pp , Dec [3] P. M. Meaney, K. D. Paulsen, M. W. Fanning, and A. Hartov, "Nonactive antenna compensation for fixed-array microwave imaging: Part II-Imaging results", IEEE Trans. Med. Imag., vol. 18, pp. 8-18, Jun [4] P. M. Meaney, M. W. Fanning, D. Li, S. P. Poplack, and K. D. Paulsen, "A clinical prototype for active microwave imaging of the breast", IEEE Trans. Microwave Theory Tech., vol. 48, pp , Nov.. [] E. C. Fear, M. A. Stuchly, "Microwave detection of breast cancer", IEEE Trans. Microwave Theory Tech., vol. 48, pp , Nov.. [6]. Chen, E. Gunawan, K. S. Low, S. C. Wang, C. B. Soh, and L. L. Thi, "Time of arrival data fusion method for two-dimensional ultrawideband breast cancer detection", IEEE Trans. Antennas Propag., vol., no., pp , Oct. 7. [7],,,, " ",, (8), pp , 9 8. [8],,,,, "LMA FDTD",, 22(12), pp , [9] K. -C. Kim, B. -D. Cho, T. -H. Kim, J. -M. Lee, S. -I. Jeon, and J. -K. Pack, "2D microwave image reconstruction of breast cancer detector using a simplex method and method of moments", Journal of KIEES, vol., no. 4, pp. 1-9, Dec.. 61

7 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 7, Jul : ( ) : Keio University () : Keio University () : : 199 9: : 1988: IEICE Japan, oung Scientist Awards 1994: IEE Japan, Paper Presentation Awards [ 주관심분야 ] EMC/EMI, : ( ) : ( ) 3 8: ( ) 199 9: [ 주관심분야 ],, : ( ) : ( ) 2: () 2 6 2: : 12 6: Research Fellow [ 주관심분야 ], : ( ) 198 9: Virginia Tech. ( ) : Virginia Tech. ( ) : : : : 199 2: : (EMERC) [ 주관심분야 ],, : ( ) : ( ) 2: ( ) 4: [ 주관심분야 ], RF, RF, 62

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