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 20 of 22 for “"Magnetic Resonance Image"”.
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Single magnetic resonance image super-resolution using generative adversarial network
… the process of converting given low-resolution images into corresponding high-resolution ones. The resolution enhancement process applied to medical images can potentially improve diagnostic accuracy for a variety of conditions and reduce imaging scan time. Recent improvements in computational …
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Polymer Gel Dosimetry in Magnetic Resonance-Image Guided Radiation Therapy
The integration of a magnetic resonance (MR) scanner with a radiation therapy treatment unit allows for adaptive radiotherapy guided by MR imaging (MR-IGRT) and has been proposed as an advanced radiotherapy treatment modality. The delineation of the tumor and adjacent organs is greatly improved by …
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Computational Magnetic Resonance Image Analysis of Brain Development in the Preterm Infant
… and behavioural disorders remain unclear.</p> <p>Magnetic resonance imaging provides the means to quantitatively assess cerebral growth and development and is being increasingly employed to study the developing preterm brain. Evidence from neonatal imaging studies has revealed a number of specific …
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Magnetic resonance image reconstruction from highly undersampled K-Space data using dictionary learning
… sensing (CS) utilizes the sparsity of MR images to enable accurate reconstruction from undersampled k-space data. Recent CS methods have employed analytical sparsifying transforms such as wavelets, curvelets, and finite differences. In this thesis, we propose a novel framework for …
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Sensors and System Integration for Magnetic Resonance Image (MRI)-Guided and Robot-Assisted Interventions
Demand for magnetic resonance image (MRI)-guided interventions and robot-assisted surgeries continues to increase in the field of medical robotics. MRI-guided interventions provide pre-/intra-operative MR images and intraoperative manipulations. Robot-assisted surgeries guarantee higher safety and …
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Volumetric, Magnetic Resonance-Visible, and Radiation-Sensitive Detectors For Magnetic Resonance Image-Guided Radiation Therapy
<h1>VOLUMETRIC, MAGNETIC RESONANCE-VISIBLE, AND RADIATION-SENSITIVE DETECTORS FOR MAGNETIC RESONANCE IMAGE-GUIDED RADIATION THERAPY</h1> <p>Hannah Jungeun Lee</p> <p>Advisory Professor: Geoffrey S. Ibbott, Ph.D.</p> <p>Due to the superior soft-tissue contrast of magnetic resonance imaging (MRI) …
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EVALUATION OF INTERPOLATION AND REGISTRATION TECHNIQUES IN MAGNETIC RESONANCE IMAGE FOR ORTHOGONAL PLANE SUPER RESOLUTION RECONSTRUCTION
… (SRR) combines several perspectives of an image (typically low resolution) in order to reconstruct a more complete and comprehensive (higher resolution) image. The aim is to use this concept on magnetic resonance imaging (MRI) data, for which the standard is to scan in several-plane …
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PROSPECTIVE HEAD MOVEMENT CORRECTION FOR HIGH-RESOLUTION MRI USING AN IN-BORE OPTICAL TRACKING SYSTEM
… human brain, subject motion is a major cause of magnetic resonance image quality degradation. To compensate the effects of head motion during data acquisition, an in-bore optical motion tracking system is proposed. The system comprises one or two MR compatible infrared cameras that are fixed on a …
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Development and characterization of methodology and technology for the alignment of fMRI time series
… an algorithm for the alignment of functional Magnetic Resonance Image (fMRI) time series. The algorithm assumes the human brain to be a rigid body and computes a head coordinate system on the basis of three reference points that lie on the directions correspondent to two of the eigenvectors of …
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Design of a 2D MRI compatible robot for performing prostate cancer treatment using therapeutic ultrasound
… many common cancers, including prostate cancer. Magnetic resonance image (MRI) guidance of therapeutic ultrasound permits targeting and monitoring of therapy. In this thesis a prototype MRI compatible positioning device for the treatment of prostate cancer using therapeutic ultrasound is …
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Comparison of transplantation modality of human mesenchymal stem cells expressing neurogenin1 in rat middle cerebral artery occlusion model: intra-arterial vs. intra-cerebral
… of transplanted cells labeled with superparamagnetic iron oxide (SPIO) labeling, and the serial changes of infarct volume in brain magnetic resonance image (MRI). MRI analysis with the SPIO-labeled cells indicated more even distribution in the animals with IA-MSCs/Ngn1 than the one with …
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A patient-specific FSI model for vascular access in haemodialysis
… low. The approach adopted here makes use of new magnetic resonance image (MRI) technology and computational modelling of blood flow, with a view to improving therapeutic strategies of disease requiring vascular interventions. This thesis presents the construction and development of a 3D finite …
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Hypnotizability and Corpus Callosum Morphology
… or medical disorders. They were in a functional Magnetic Resonance Image (fMRI) study examining the neurophysiology of pain and hypnotic analgesia (Crawford, Horton, Harrington, et al., 1998; Downs et al., 1998). As assessed by the group version (Crawford & Allen, 1982) of the Stanford Hypnotic …
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Synthesis, Characterization and Structure-Property Relationships of Polymer-Stabilized Nanoparticles Containing Imaging and Therapeutic Agents
The controllable design of magnetic nanocarriers is essential for advanced in vivo applications such as magnetic resonance image-guided therapeutic delivery and alternating magnetic field-induced remote release of drugs. This work describes the fabrication of polymer-stabilized nanoparticles …
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Factors affecting the Pain & Disability of the Low back pain patients
… patients who were proved the disease through MRI(magnetic resonance image)at the neurosurgery unit at A university Hospitals in S city, Korea, and were admitted to hospital with low back pain, radiating leg pain and lumbar spine lesion. The research data were collected from June 3, 2004 to march …
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The Clinical Analysis of Factors Predicting the Need for Shunting in Normal Pressure Hydrocephalus
… convexity in brain computed tomography or brain magnetic resonance image and performed radioisotope cisternography (RIC), 24 hours ICP monitoring and continuous external lumbar drainage. After decision of treatment modality we followed up patients with NPH during 3 months.The result of treatment …
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Transform learning based image and video processing
… from data. Numerous applications such as image denoising, magnetic resonance image (MRI), and computed tomography (CT) reconstruction have been shown to benefit from a good adaptive sparse model. Recently, the sparsifying transform model has received interest, for which sparse coding is …
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Characterizing Medial Temporal Lobe Neurodegeneration Due To Tau Pathology In Alzheimer's Disease Using Postmortem Imaging
… Disease (AD). Using in vivo structural magnetic resonance image (MRI) analysis, volumetric change in the MTL caused by neurodegeneration can be measured. While these measurements have been shown to be sensitive to structural change during the early stages of AD, the potential of these …
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Adaptive nonlocal and structured sparse signal modeling and applications
… and computer vision. Many applications such as image and video denoising, inpainting, demosaicing, super-resolution, magnetic resonance imaging (MRI), and computed tomography (CT) reconstruction have been shown to benefit from adaptive sparse signal modeling. However, synthesis dictionary …
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