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 16 of 16 for “"NMR imaging"”.
-
NMR imaging of tumor angiogenesis
… two times those of normal tissue vessels. NMR techniques based on magnetic susceptibility mechanisms are sensitive to varying sizes of blood vessels. By using gradient echo (GE) and spin echo (SE) pulse sequences and different concentrations of an exogenous contrast agent, it is possible to …
-
Studies of corn kernel steeping using microscopic NMR imaging
… Fourier transform and projection reconstruction imaging methods.
-
Fluid flow in porous media : NMR imaging and numerical simulation
We use nuclear magnetic resonance (NMR) imaging to obtain a three-dimensional image of the pore structure in a limestone core, 4.5 mm in diameter and 10 mm in length, with a resolution of 40 [mu]m. This image is converted into boundary conditions for simulation of fluid flow through the rock using …
-
Non-invasive measurement of physiology using dynamic susceptibility contrast NMR imaging
Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1995.
-
Hyperpolarized Nuclei for NMR Imaging and Spectroscopy – Methodology and model studies of lung and vascular function
… on the principle of nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) are widely used methods in medical diagnostic imaging and biological research. Clinical MRI has been restricted to imaging of protons, for reasons of sensitivity. In …
-
Magnetic resonance imaging via radio frequency gradient with examples from NMR and pure NQR
… thesis, we explore the use of RF gradients in NMR imaging. RF gradients have advantages over gradients of the static magnetic field in that they are non-secular and offer more experimental freedom (for example they permit amplitude, phase and frequency variations). In the case of pure NQR …
-
Magnetic Resonance Microscopy: 1. Four-Dimensional Spectral-Spatial Imaging. 2. Diffusional Effects in Magnetic Resonance Microscopy
… is a new method for nuclear magnetic resonance (NMR) microscopy which couples a spatially localized region of saturated magnetization to the surrounding medium via translational diffusion of spins, resulting in amplification of the total saturated magnetization by several orders of magnitude over …
-
Magnetic resonance characterization of gadolinium-based contrast agents
… gadolinium-based contrast agents in NMR Imaging in this thesis. Many Gd-based contrast agents were studied including Gd DTPA(dimethylenetriaminepentaacetic acid). The zero field splitting energies and g values of Gd complexes were obtained in frozen solutions by the EPR technique. …
-
Accurate monitoring of x, y, and z magnetization for analysis of hardware and pulse sequence performance in NMR spectroscopy
<p>"A new nuclear magnetic resonance (NMR) imaging protocol has been developed to independently record the x, y, and z components of the nuclear net magnetization at any point in a pulse sequence while eliminating the observation of the other components. This protocol provides an experimental …
-
Magnetic resonance microscopy
… of 4D spectral-spatial magnetic resonance imaging (MRI) data. The algorithm uses n-1 successive stages of 2D filtered backprojection to reconstruct an nD image. This approach results in a reduction in computational time on the order of Nn-2 relative to the single stage technique, where Nn …
-
A Multiscale Study of Foam: The Phase Behavior, Transport, and Rheology of Foam in Porous Media
… oil was probed using nuclear magnetic resonance (NMR) imaging technique. Manganese (II) was doped into the surfactant solution to reduce the T_2 relaxation time of water in order to differentiate the NMR response from the oil. The measured apparent viscosity was mapped out with respect to …
-
Dichte-gewichtete Phasenkodierung zur effizienten k-Raumabtastung in der NMR-Bildgebung
Die spektroskopische NMR-Bildgebung (Chemical Shift Imaging, CSI) kombiniert die Lokalisationstechniken der NMR-Tomographie mit der NMR-Spektroskopie und bietet so eine ortsaufgelöste metabolische Information über das untersuchte Gewebe. Mit dieser Technik können Stoffwechselvorgänge direkt und …
-
Dextran Magnetite as an NMR Contrast Agent
Made available in DSpace on 2017-07-06T18:42:13Z (GMT). No. of bitstreams: 3 Alameda_Jay_C_Jr_MS.pdf: 36399097 bytes, checksum: a08d9d029c3e486ed573a217b4bbf5e2 (MD5) Alameda_Jay_C_Jr_MS_ABS.pdf: 1261364 bytes, checksum: e54d7b39be48ea31cc1b6086ec21f499 (MD5) license.txt: 4813 bytes, checksum: …
-
Untersuchungen zum Mechanismus des Wassertransportes in Höheren Pflanzen mit Hilfe der Druckmeßsonden- und NMR-Bildgebungstechnik
… wurden mit Hife der Druckmeßsonden- und NMR-Bildgebungstechnik durchgeführt. Dabei wurden Experimente zum Einfluß der Schwerkraft auf den Wasserferntransport an einer Liane bei unterschiedlicher Orientierung der Pflanze durchgeführt. Der zweite Teil der Arbeit beschäftigte sich mit der …