Search for dissertations about: "MAGNETIC-RESONANCE-SPECTROSCOPY"

Showing result 1 - 5 of 99 swedish dissertations containing the word MAGNETIC-RESONANCE-SPECTROSCOPY.

  2. 1. Spectral analysis and magnetic resonance spectroscopy

    Author : Tomas Sundin; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nonparametric spectral analysis; magnetic resonance spectroscopy; parameter estimation; maximum likelihood estimation; nonlinear least squares; Signal processing; Signalbehandling; Signal Processing; Signalbehandling;

    Abstract : This dissertation is concerned with nonparametric approaches for spectral analysis (SA) and algorithms for magnetic resonance spectroscopy (MRS) data analysis.A method to obtain the optimal smoothing window for the class of SA methods based on local smoothing of the periodogram is proposed. READ MORE

  4. 2. Atomic-beam magnetic resonance spectroscopy : development of fast on-line techniques, studies of ground and metastable state, properties in short-lived nuclei

    Author : Gudmund Wannberg; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  5. 3. Proton Magnetic Resonance Spectroscopy in Brain Tumors - Clinical Applications

    Author : Isabella Björkman-Burtscher; Lund Diagnostisk radiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; radiology; Clinical physics; Localization; Abscess; Brain; Tumor; Spectroscopy; Magnetic Resonance; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

    Abstract : Aims: · to present a test phantom and test method for evaluation of proton magnetic resonance spectroscopy (1H-MRS) single volume localization techniques regarding signal contamination; · to describe the introduction of 1H-MRS in the daily routine of a standard MR-unit; · to evaluate the possibilities offered by 1H-MRS to improve preoperative diagnostic accuracy in patients scheduled for stereotactic biopsy of intracranial mass lesions; · to evaluate the possibilities offered by 1H-MRS to improve diagnostics and therapy control in patients with brain abscesses; · to test the hypothesis that 1H-MRS might be useful for differentiation of brain tumors, based on metabolic changes in tissue across brain lesions or surrounding tissue. Results and conclusions: · The test phantom and test method allow quality assessment with good reproducibility. READ MORE

  6. 4. Immunological Mechanisms and Natalizumab Treatment in Multiple Sclerosis : Studies on lymphocytes, inflammatory markers and magnetic resonance spectroscopy

    Author : Johan Mellergård; Magnus Vrethem; Jan Ernerudh; Charlotte Dahle; Sten Fredrikson; Linköpings universitet; []
    Keywords : ;

    Abstract : Background: Multiple sclerosis (MS) is a chronic inflammatory, demyelinating disease of the central nervous system (CNS), and a frequent cause of neurological disability among young adults. In addition to focal inflammatory demyelinated lesions, diffuse white matter pathology as well as a neurodegenerative component with accumulating axonal damage and gliosis have been demonstrated and contribute to MS disease characteristics. READ MORE

  7. 5. Neurotransmitter Imaging of the Human Brain : Detecting γ-Aminobutyric Acid (GABA) Using Magnetic Resonance Spectroscopy

    Author : Sofie Tapper; Peter Lundberg; Anders Tisell; Peter Zsigmond; Richard Edden; Linköpings universitet; []
    Keywords : ;

    Abstract : Introduction: In this thesis, MEGA-edited Magnetic Resonance Spectroscopy (MRS) has been used for the purpose of non-invasive detection of !- aminobutyric acid (GABA) within the brain. GABA is the main inhibitory neurotransmitter in the human central nervous system, and glutamate is the corresponding main excitatory neurotransmitter. READ MORE