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.
Results
Showing 1 to 17 of 17 for “"Parallel Imaging"”.
-
Fast Magnetic Resonance Imaging by Data Sharing: Generalized Series Imaging and Parallel Imaging
… and image reconstruction in data-sharing imaging. Specifically, two imaging techniques based on a generalized series (GS) model and a parallel data acquisition strategy are developed to improve imaging speed with a minimal concomitant loss of image quality. First, a new GS imaging method …
-
Accelerating magnetic resonance imaging by unifying sparse models and multiple receivers
Magnetic resonance imaging (MRI) is an increasingly versatile diagnostic tool for a variety of medical purposes. During a conventional MRI scan, samples are acquired along a trajectory in the spatial Fourier transform domain (called k-space) and the image is reconstructed using an inverse discrete …
-
A machine learning based method for sensitivity estimation for accelerated magnetic resonance spectroscopy imaging using phased array coils
Magnetic resonance spectroscopic imaging (MRSI) enables in-vivo analysis of the spatial distribution of chemicals within the human body. Through MRSI, one can infer the concentration of various metabolites in different regions throughout the body. While the medical implications of such an imaging …
-
Magnetic Resonance Imaging of the Heart and Vasculature at 3 Tesla: Novel Strategies for the Diagnosis and Risk Stratification of Cardiovascular Disease
… (1) To study the effects of field strength and parallel imaging on image contrast and the interstudy reproducibility of right and left ventricular (RV and LV) measurements using steady-state free precession (SSFP) cardiac magnetic resonance; (2) to explore the impact of 3T parallel imaging …
-
Methods for functional brain imaging
Magnetic resonance imaging (MRI) has demonstrated the potential for non-invasive mapping of structure and function (fMRI) in the human brain. In this thesis, we propose a series of methodological developments towards improved fMRI of auditory processes. First, the inefficiency of standard fMRI that …
-
Hyperpolarized Xenon-129 Magnetic Resonance Imaging of Functional Lung Microstructure
… contrast agent for lung magnetic resonance imaging (MRI), which upon inhalation follows the functional pathway of oxygen in the lung by dissolving into lung tissue structures and entering the blood stream. HXe MRI therefore provides unique opportunities for functional lung imaging of gas …
-
A subspace approach to accelerated cardiovascular magnetic resonance imaging
"Magnetic resonance imaging (MRI) is a uniquely flexible tool for imaging the heart, as it has the potential to perform a significant number of structural and functional cardiovascular assessments. However, the low imaging speed of MRI has limited its clinical application. The assessments that are …
-
Accelerated Quantitative Magnetization Transfer (qMT) Imaging
… transfer (qMT) is an advanced magnetic resonance imaging (MRI) technique with enhanced specificity to myelin. The acquisition of many images with unique magnetization transfer (MT) saturation results in a signal response curve known as the z-spectrum. The two-pool tissue model, which describes …
-
ADVANCED MRI FOR CARDIAC ASSESSMENT IN MICE
… experiments in mice, in vivo magnetic resonance imaging (MRI) can be used to evaluate heart anatomy and function at multiple levels. Volumetric measurements of ventricle size at each phase of the heart cycle (obtained with cine MRI) can be used as a sensitive measure for heart failure. Cine MRI …
-
Three-dimensional Quantitative Magnetic Resonance Imaging of Carotid Atherosclerotic Plaque
… resolution, multi-contrast magnetic resonance imaging (MRI) can qualitatively identify these features and monitor disease progression. Compared to traditional contrast weighted imaging, quantitative MRI could provide an objective assessment of disease. Therefore, the general hypothesis …
-
Bridging Mri Reconstruction Across Eras: From Novel Optimization Of Traditional Methods To Efficient Deep Learning Strategies
Magnetic Resonance Imaging (MRI) has been extensively used as a non-invasive modality for imaging the human body. Despite substantial advances over the past decades, scan duration remains as a principal issue for MRI scanning, requiring novel techniques to accelerate data acquisition. Such …
-
Acceleration of Subtractive Non-contrast-enhanced Magnetic Resonance Angiography
… (3D) femoral artery fresh blood imaging (FBI). The structure of the thesis is as follows: Chapter 1 describes the anatomy and physiology of the vascular system, including the characteristics of arteries and veins, and the MR properties and flow characteristics of blood. These …
-
High resolution 3D diffusion tensor imaging for delineating neuronal architectures
Diffusion tensor imaging (DTI) has long been an important tool for early diagnosis and monitoring of neuronal diseases as well as for understanding the connectivity of neuronal networks. However, the intrinsic problem of DTI is the partial volume effect, which worsens when the structure of interest …
-
Fundamentals of heat transfer and thermal-mechanical control for improved atomic force microscopy
… data storage, and thermal topography imaging. This work focuses on thermal topography imaging wherein the cantilever measures the surface topography by tracking changes in the cantilever heat flow. This work shows the experimental and numerical investigation of cantilever heat transfer …
-
Development of Fully Balanced Ssfp and Computer Vision Applications For Mri-Assisted Radiosurgery (Mars)
<p>Prostate cancer is the second most common cancer in men and the second-leading cause of cancer death in men. Brachytherapy is a highly effective treatment option for prostate cancer, and is the most cost-effective initial treatment among all other therapeutic options for low to intermediate risk …
-
Distortion-optimal parallel MRI with sparse sampling: from adaptive spatio-temporal acquisition to self-calibrating reconstruction
… sampling and reconstruction that pertain to parallel magnetic resonance imaging (pMRI). The first part of this dissertation addresses adaptive design of spatio-temporal acquisition and reconstruction in model-based pMRI wherein the signal model is a sparse support. We develop a …