Modeling with the FDTD method for microwave breast cancer detection

This paper addresses important issues related to finite-difference time-domain modeling for microwave breast cancer detection. We present a simple and efficient way of modeling dispersion for various types of biological tissue, in the range of 30 MHz-20 GHz. Propagation and absorbing boundary condit...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2004-08, Vol.52 (8), p.1890-1897
Main Authors: Kosmas, P., Rappaport, C.M., Bishop, E.
Format: Article
Language:English
Subjects:
Biological system modeling
Biological tissues
Boundary conditions
Breast cancer
Cancer detection
Finite difference methods
Microwave propagation
Microwave theory and techniques
Solid modeling
Time domain analysis
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Summary:This paper addresses important issues related to finite-difference time-domain modeling for microwave breast cancer detection. We present a simple and efficient way of modeling dispersion for various types of biological tissue, in the range of 30 MHz-20 GHz. Propagation and absorbing boundary conditions are modified accordingly. Results from three-dimensional simulations of a semiellipsoid geometric representation of the breast terminated by a planar chest wall illustrate the effect of certain important aspects of the detection problem including: 1) the pulse distorting effects of propagation in frequency-dependent tissue; 2) the choice of the surrounding medium; and 3) the transmitter location relative to the breast and chest wall. In particular, it is shown that the presence of the chest wall can affect greatly the system's detection abilities, even for tumors that are not located in the proximity of the chest wall.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2004.831985