Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/36263
Title: NEW METHODS OF FAST IMAGE RECONSTRUCTION IN X-RAY TOMOGRAPHY AND PHASE CONTRAST IMAGING
Authors: VO TRONG NGHIA
Keywords: tomographic reconstruction, phase retrieval, image reconstruction, phase contrast imaging, X-ray tomography, X-ray phase contrast tomography
Issue Date: 8-Aug-2012
Source: VO TRONG NGHIA (2012-08-08). NEW METHODS OF FAST IMAGE RECONSTRUCTION IN X-RAY TOMOGRAPHY AND PHASE CONTRAST IMAGING. ScholarBank@NUS Repository.
Abstract: The thesis presents author's contributions on developing reconstruction algorithms in two areas of imaging techniques: X-ray tomography and X-ray phase contrast imaging. These techniques are based on the theory of inverse Radon transform and phase retrieval, respectively. They provide information about the internal structure of a sample and its refractive index which are very important in material science, biology, and medicine. Although methods of implementing these theories have been developing intensively for many decades, there are still rooms for further developments. The author proposed three new contributions in three different areas of tomography and phase retrieval including: local tomography, iterative tomographic reconstruction and phase retrieval in the Fresnel region. Particularly, these contributions are: a pre-calculated intersection lengths array (PILA) approach for simulated annealing tomography, an approximate formula for numerical implementation of pseudolocal tomography and an accelerator, named random signed feedback (RSF), for enhancing the convergence speed of iterative phase retrieval.
URI: http://scholarbank.nus.edu.sg/handle/10635/36263
Appears in Collections:Ph.D Theses (Open)

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