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 75 for “"Magnetic resonance (MR)"”.
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Deep Learning for Semi-Automated Brain Claustrum Segmentation on Magnetic Resonance (MR) Images
… becomes a challenging task, especially for Magnetic Resonance Images (MRI). In reality, it is a time- consuming procedure that requires trained biomedical experts to manually segment or annotate such MRI datasets. The need for automated segmentation or annotation is what motivates our work. …
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Multi-class segmentation of brain tumor using Convolution Neural Network
… is used to segment multi-modal Brain Tumors from Magnetic Resonance (MR) images. Due to the challenges in manual segmentation, computerized brain tumor segmentation is one of the most important challenges in medical imaging. The fully convolutional structure of the network makes it faster than any …
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Biochemistry of the uterus studied by magnetic resonance techniques
Magnetic resonance (MR) is a rapidly growing versatile and non-destructive tool for investigation of various aspects of biochemistry, physiology and disease. It is valuable to evaluate the new MR techniques and apply them to the most important problems for which they are best suited. This study …
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Portable magnetic resonance sensors and methods for noninvasive disease diagnostics
… clinical management of these disorders. Proton magnetic resonance is exquisitely sensitive to the local physical and chemical environment of water molecules within the body. Therefore, we hypothesized that localized magnetic resonance (MR) measurements could interrogate local tissue fluid …
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Injectable polymer for in vivo oxygen sensing
… oxygen sensitive and can be interrogated using Magnetic Resonance Imaging (MRI) or Magnetic Resonance (MR) technology to report the oxygen tension in vivo at the site of implant. The polymer was tested for its sensitivity in response to oxygen, and the specificity of response to oxygen was …
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A Complete Dosimetric Model of the Gamma Knife Perfexion Using Penelope Monte Carlo Codes
… images from computed tomography (CT) and/or magnetic resonance (MR) imaging, as well as manual skull measurements. The manufacturer's software used to plan the delivery of these treatments uses a simplistic set of assumptions that do not consider heterogeneous tissue structures.
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Quantitative lactate-specific magnetic resonance imaging and proton spectroscopy of muscle and brain
The techniques of magnetic resonance (MR) imaging and spectroscopy have recently garnered much attention as tools for detecting and localizing metabolic changes in living tissues in various pathologic states and during physiologic activation. For example, in studies employing localized MR …
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Performance analysis of automatic techniques for tissue classification in magnetic resonance images of the human brain
Classification of Magnetic Resonance (MR) images of the human brain into anatomically meaningful tissue labels is an important processing step in many research and clinical studies in neurology. The medical imaging research community is presented with a wide choice of classification algorithms from …
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Magnetic resonance diffusion imaging and spectral localization: New methods and their quantitative applications
… of water and metabolites in living systems by magnetic resonance (MR) techniques. Knowledge of the diffusion coefficients of the molecules can yield unique information about microstructure and function of tissue. We have developed a method for the measurement of anisotropic diffusion by MR …
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T2 Characterization of Oil-In-Water Emulsions for NMR Sensor Applications
… approach through a portable single-sided magnetic resonance (MR) sensor. We are developing a more accurate and clinically relevant hydration metric through measuring localized skeletal muscle. Phantoms are used as stand-ins for a human subject to calibrate and ensure system functionality. …
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Cerebrospinal fluid flow quantification in the brain using magnetic resonance imaging
… flow enhanced signal intensity (FENSI), uses magnetic resonance (MR) to gain a quick and accurate measurement. By adjusting imaging parameters from quantitative FENSI (qFENSI), we can optimize this sequence to be sensitive to CSF flow. We demonstrate the sensitivity of our technique down to …
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Image guidance in cardiac electrophysiology
… integration of pre-operative, patient-specific magnetic resonance (MR) or computed tomography (CT) imaging data with real-time electroanatomical mapping (EAM) information.
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Gradient characterization in magnetic resonance imaging
Special magnetic resonance (MR) scans, such as spiral imaging and echo-planar imaging, require speed and gradient accuracy while putting high demands on the MR gradient system that may cause gradient distortion. Additionally, high field MR scans are prone to inhomogeneities that disturb the …
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Stabilization of liposomal functional anchors by cross-linkable lipids
… conjugated with a hydrophobic anchor and the magnetic resonance (MR) contrast agent, gadolinium, as a model functionality. This strategy served to stabilize the thermodynamically favorable association between liposome and modified functional chitosan. Furthermore, the chitosan-coated, …
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Catheter based magnetic resonance compatible perfusion probe
… perfusion measurement taken with the TDP, with magnetic resonance (MR) perfusion imaging. MR perfusion imaging provides an excellent, but relative, global assessment of compromised tissue perfusion. Due to the many clinical and diagnostic benefits of real-time, absolute quantification of blood …
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Detecting open surfaces in three dimensions
… their utility on challenging structural magnetic resonance (MR) datasets and seismic-reflection volumes.
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Nuclear magnetic resonance readable sensors
… of molecular sensors which can be read by magnetic resonance (MR) relaxometry. MR is an advantageous bio-sensor readout because it can be determined from opaque samples and through intervening layers of matter. Wash steps can therefore be avoided in in vitro MR assays and non-invasive …
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Magnetic resonance imaging and surface-based analysis techniques to quantify growth of the developing brain
… brain can be imaged conveniently in small-animal magnetic resonance: MR) scanners. Here, MR imaging was used to acquire three-dimensional image volumes of the ferret brain in vivo at different stages during the period of cortical folding. Through segmentation of these volumes, surface …
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Correlation of Tooth Length Measurements made on CBCT and 3T MR Images
… tomography (CBCT) scans and 3-Tesla (3T) magnetic resonance (MR) scans performed with and without an alginate bite registration surrounding the crowns of the teeth. Materials and Methods. One CBCT scan, one MR scan with alginate bite registration, and one MR scan without bite registration …
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