Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/62104
Title: Constrained magnetic resonance image reconstruction from incomplete frequency measurements
Authors: Deng, Jun
Keywords: DRNTU::Engineering::Computer science and engineering::Computing methodologies::Image processing and computer vision
Issue Date: 2014
Source: Deng, J. (2014). Constrained magnetic resonance image reconstruction from incomplete frequency measurements. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: In this thesis, we develop constrained reconstructions methods to reconstruct high quality MR images from down-sampled k-space data by exploiting sparsity of MR images under the theory of Compressed Sensing. In the first work, we present an orthonormal-expansion L1 optimization technique to improve computational efficiency of existing methods without sacrificing the reconstruction accuracy. In order to achieve more accurate reconstructions especially in high under-sampling ratios, a novel method for motion-compensated reference-driven MR image reconstruction is presented in the second work with two sources of constraints: sparsity and prior information from a reference image. In the third work, we focus on reconstructions of MR images that have metallic implants. In order to reduce scan time incurred to fully correct metal artefacts and meanwhile improve SNR of results brought by the state-of-the-art methods, we propose a projection on convex set reconstruction technique to combine CS denoising and parallel MRI.
URI: https://hdl.handle.net/10356/62104
DOI: 10.32657/10356/62104
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Theses

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