Title :
An FDTD approach to the time-domain inverse scattering problem for a lossy cylindrical object
Author :
Takenaka, Takashi ; Jia, Hongting ; Tanaka, Toshiyuki
Author_Institution :
Dept. of Electr. & Electron. Eng., Nagasaki Univ., Japan
Abstract :
We present a time-domain propagation-backpropagation algorithm for computing images of the internal structure of a two-dimensional object with high-contrast electric properties. The algorithm is based on an optimization technique. In each iteration step of the algorithm one forward problem and one adjoint problem are solved efficiently by using the finite-difference time-domain method. A numerical calculation shows that the algorithm can image a malignant tumor in normal breast tissue
Keywords :
absorbing media; electromagnetic wave scattering; finite difference time-domain analysis; image reconstruction; inverse problems; medical image processing; microwave imaging; optimisation; tumours; FDTD approach; adjoint problem; finite-difference time-domain method; forward problem; high-contrast electric properties; internal structure images; iteration step; lossy cylindrical object; malignant tumor imaging; normal breast tissue; numerical calculation; optimization technique; time-domain inverse scattering problem; time-domain propagation-backpropagation algorithm; two-dimensional object; Breast tissue; Breast tumors; Electric variables measurement; Finite difference methods; Image reconstruction; Inverse problems; Permeability; Permittivity measurement; Propagation losses; Time domain analysis;
Conference_Titel :
Microwave Conference, 2000 Asia-Pacific
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6435-X
DOI :
10.1109/APMC.2000.925818
