Sökning: "qMRI"
Visar resultat 1 - 5 av 7 uppsatser innehållade ordet qMRI.
1. Implementation and verification of a quantitative MRI method for creating and evaluating synthetic MR images
Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)Sammanfattning : The purpose of this thesis was to implement and quantitatively test a quantitative MRI (qMRI) method, from which synthetic MR images are created and also evaluated. The parameter maps of T1, T2*, and effective proton density (PD*) were tested with reference tubes containing different relaxation times, and concentrations of water (H2O) and heavy water (D2O). LÄS MER
2. Automatic Segmentation and Classification of Multiple Sclerosis Lesions Using Quantitative Magnetic Resonance Imaging
Master-uppsats, Linköpings universitet/Institutionen för medicinsk teknikSammanfattning : Multiple sclerosis is a neurological disease causing a degeneration of myelin around the axons in the central nervous system. This process leaves traces in the form of lesions, which can be distinguished in an MRI examination. It is important to detect these at an early stage to state diagnosis and initiate medication. LÄS MER
3. Automatic Segmentation of Knee Cartilage Using Quantitative MRI Data
Master-uppsats, Linköpings universitet/DatorseendeSammanfattning : This thesis investigates if support vector machine classification is a suitable approach when performing automatic segmentation of knee cartilage using quantitative magnetic resonance imaging data. The data sets used are part of a clinical project that investigates if patients that have suffered recent knee damage will develop cartilage damage. LÄS MER
4. Image Registration and Analysis within quantitative MRI to improve estimation of brain parenchymal fraction
Master-uppsats, Linköpings universitet/Institutionen för medicinsk teknikSammanfattning : In certain neuro-degenerative diseases likemultiple sclerosis (MS), the rate of brain atrophy can be measured by monitoring the brain parenchymal fraction (BPF) in such patients. The BPF is defined as the ratio of brain parenchymal volume (BPV, defined as the total volume of gray matter tissue, white matter tissue and other unidentified tissue) and intracranial volume (ICV, the total volume of the skull). LÄS MER
5. Automatic Brain Segmentation into Substructures Using Quantitative MRI
Master-uppsats, Linköpings universitet/DatorseendeSammanfattning : Segmentation of the brain into sub-volumes has many clinical applications. Manyneurological diseases are connected with brain atrophy (tissue loss). By dividingthe brain into smaller compartments, volume comparison between the compartmentscan be made, as well as monitoring local volume changes over time. LÄS MER