Near electromagnetic fields in medical and radar imaging

• Main Author: Thiyagarajah Sudharshan Naveendra.
• Other Authors: School of Electrical and Electronic Engineering
• Format: Theses and Dissertations
• Language: English
• Published: 2008
• Subjects: DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing; DRNTU::Engineering::Computer science and engineering::Theory of computation::Analysis of algorithms and problem complexity
• Online Access: http://hdl.handle.net/10356/13296
• Institution: Nanyang Technological University

This thesis addresses the impact of the near electromagnetic fields in the areas of Radar imaging, biomedical imaging and signal processing. In Radar imaging the conventional point scatterer model is replaced by a collection of infinitesimal electric dipole model which is used to formulate a near-field electromagnetic signal model for image synthesis. Two new factors, namely a Magnitude Modifying Factor and a Phase Modifying Factor have been introduced. An algorithm to perform imaging in the near field region has been proposed and the inherent image intensity artifacts have been removed by incorporating the two aforementioned factors. The corrected image domain data is shown to yield accurate Radar images in the near field region.