الفهرس 
Chapter One: IntroductionOnly 14 pages are availabe for public view
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Abstract
Tomographic image of biological object in Terahertz and Microwaves image are of great interest in allowing the image of a biological object to be achieved. The inverse scattering problem of three-dimensional terahertz medical imaging is investigated. The inverse scattering investigates the problem of image reconstruction of biological object bodies and determining the relation between the electromagnetic scattered field and the volumic current distribution in all directions. Dielectric object of known permittivity is located in situated medium around the object and illuminated by a group of unrelated incident Terahertz waves and Microwaves. The scattered field is received in a plain situated behind the biological object. The theoretical analysis is based on the principle that the scattered electromagnetic field is function of the volumic distribution of equivalent currents inside the biological object. Numerical results are given to demonstrate the capability of the inverse scattered problem algorithm. To realize this method the tomographic image reconstruction of cylindrical objects and dielectric sphere and cylindrical objectare obtained from calculated scattered electric field. Moreover, the effect of sampling and quantization on tomographic image fidelity is reviewed. The numerical assessment based on the transmission line matrix method is used to obtain the form of the biological object. The effect of various discretization parameters on the convergence of the transmission line matrix method is studied in detail. Exact and efficient dielectric profile image reconstructions of three dimensions lossy scatterers from different complex cross sections using synthetic scattered field data are presented. The influence of antenna spacing and the suitability of simplified transmission line matrix models for system evaluation are examined.
The possibility of Terahertz and microwave imaging in medical applications is investigated by design and implementation electromagnetic system. Experiments set are carried out with dielectric object immersed in water. The scattered field distribution is measured in a plane situated behind the object. They show that this field distribution depends on the object shape. The results of scattered electromagnetic field measurements carried out on different material objects are
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given. Good reconstruction is obtain from measured data even the results of scattered electromagneticfield measurements carried out on different material objects are given.