Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Regularized Reconstruction"”.
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SEARCHLIGHT CT: A NEW REGULARIZED RECONSTRUCTION METHOD FOR HIGHLY COLLIMATED X-RAY TOMOGRAPHY
This thesis introduces a new method for image reconstruction in collimated Computed Tomography called Searchlight CT. The method significantly reduces the overall radiation exposure when primarily the reconstruction of a specified region of interest is required. To achieve this, the Searchlight CT …
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Techniques for Approximating Optimal Linear Estimators of Multidimensional Data
… estimation framework are used to illustrate how regularized reconstruction of noisy projection data can be improved by exploiting the angular correlation of the true data. In the setting of a filtered back-projection (FBP) reconstruction scheme, this corresponds to performing the filtering step …
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Development and implementation of efficient noise suppression methods for emission computed tomography
<p>In PET and SPECT imaging, iterative reconstruction is now widely used due to its capability of incorporating into the reconstruction process a physics model and Bayesian statistics involved in photon detection. Iterative reconstruction methods rely on regularization terms to suppress image noise …
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Photonic design for chemical analysis
… the scatterer. For smooth spectra, we devise a regularized reconstruction algorithm based on Chebyshev interpolation, which yields higher accuracy compared with conventional treatment in which the spectra are sampled at equally spaced frequencies or wavelengths with equal weights. Our approaches …
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High-dimensional MR spectroscopic imaging integrating physics-based modeling and machine learning
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01