Show simple item record

dc.contributor.supervisor Noghanian, Sima (Electrical and Computer Engineering) Shafai, Lotfollah (Electrical and Computer Engineering) en_US
dc.contributor.author Sabouni, Abas
dc.date.accessioned 2011-09-02T17:24:11Z
dc.date.available 2011-09-02T17:24:11Z
dc.date.issued 2011-09-02
dc.identifier.uri http://hdl.handle.net/1993/4834
dc.description.abstract This thesis presents the research results on the development of a microwave tomography imaging algorithm capable of reconstructing the dielectric properties of the unknown object. Our focus was on the theoretical aspects of the non-linear tomographic image reconstruction problem with particular emphasis on developing efficient numerical and non-linear optimization for solving the inverse scattering problem. A detailed description of a novel microwave tomography method based on frequency dependent finite difference time domain, a numerical method for solving Maxwell's equations and Genetic Algorithm (GA) as a global optimization technique is given. The proposed technique has the ability to deal with the heterogeneous and dispersive object with complex distribution of dielectric properties and to provide a quantitative image of permittivity and conductivity profile of the object. It is shown that the proposed technique is capable of using the multi-frequency, multi-view, and multi-incident planer techniques which provide useful information for the reconstruction of the dielectric properties profile and improve image quality. In addition, we show that when a-priori information about the object under test is known, it can be easily integrated with the inversion process. This provides realistic regularization of the solution and removes or reduces the possibility of non-true solutions. We further introduced application of the GA such as binary-coded GA, real-coded GA, hybrid binary and real coded GA, and neural-network/GA for solving the inverse scattering problem which improved the quality of the images as well as the conversion rate. The implications and possible advantages of each type of optimization are discussed, and synthetic inversion results are presented. The results showed that the proposed algorithm was capable of providing the quantitative images, although more research is still required to improve the image quality. In the proposed technique the computation time for solution convergence varies from a few hours to several days. Therefore, the parallel implementation of the algorithm was carried out to reduce the runtime. The proposed technique was evaluated for application in microwave breast cancer imaging as well as measurement data from university of Manitoba and Institut Frsenel's microwave tomography systems. en_US
dc.subject Microwave imaging en_US
dc.subject Microwave tomography en_US
dc.subject Breast cancer detection en_US
dc.subject finite difference time domain en_US
dc.subject Genetic algorithm en_US
dc.subject Global optimization en_US
dc.subject Breast imaging en_US
dc.subject Frequency dependence finite difference time domain en_US
dc.subject Real genetic algorithm en_US
dc.subject Binary genetic algorithm en_US
dc.subject Hybrid genetic algorithm en_US
dc.subject Maxwell's equations en_US
dc.subject Inverse scattering problem en_US
dc.title Ultra-WideBand (UWB) microwave tomography using full-wave analysis techniques for heterogeneous and dispersive media en_US
dc.degree.discipline Electrical and Computer Engineering en_US
dc.contributor.examiningcommittee Thomas, Gabriel (Electrical and Computer Engineering) Pistorius, Stephen (Physics and Astronomy) Elsherbeni, Atef (Electrical Engineering, University of Mississippi) en_US
dc.degree.level Doctor of Philosophy (Ph.D.) en_US
dc.description.note October 2011 en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

View Statistics