Search for dissertations about: "Brain lesion"

Showing result 1 - 5 of 127 swedish dissertations containing the words Brain lesion.

  2. 1. 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

  4. 2. Gadodiamide injection for Enhancement of MRI in the CNS. Applications, dose, field and time dependence

    Author : Per Åkeson; Malmö Diagnostisk radiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Clinical physics; Phantom study.; Comparative study; Human; Time dependence; Dosage; Enhancement; Gadolinium; MRI contrast media; Contrast media; Magnetic resonance imaging; Spine; Brain neoplasms; secondary; Brain; radiology; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

    Abstract : Aims of the study The aims of this study using Gadodiamide injection were to investigate: · Whether Gadodiamide injection was comparable to Gd-DTPA for the enhancement of CNS lesions. · The contrast effect at different field strengths. · The effective time-window for the enhancement of blood-brain barrier damage. READ MORE

  5. 3. Impact of Tissue Characteristics on Radio-Frequency Lesioning and Navigation in the Brain : Simulation, experimental and clinical studies

    Author : Johannes Johansson; Karin Wårdell; Hans von Holst; Linköpings universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Brain; Radio frequency ablation; Finite element method; Monte Carlo simulation; light reflectance; Radiological research; Radiologisk forskning;

    Abstract : Radio-Frequency (RF) lesioning, or RF ablation, is a method that uses high frequency currents for thermal coagulation of pathological tissue or signal pathways. The current is delivered from an electrode, which also contains a temperature sensor permitting control of the current at a desired target temperature. In the brain, RF lesioning can e.g. READ MORE

  6. 4. Experimental Traumatic Brain Injury and Cell Death - in vivo and in vitro aspects

    Author : Gustav Mattiasson; Sektion IV; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; neurofysiologi; neuropsychology; Neurology; uncoupling protein; mitochondrial permeability transition; cerebral blood flow; functional outcome; cell death; mitochondria; hippocampus; preconditioning; trauma; Brain; ischemia; neuropsykologi; Neurologi; neurophysiology;

    Abstract : Traumatic and ischemic brain damage are major causes of disability and death. While much effort has been spent on developing pharmacological treatments for these conditions, no neuroprotective drugs are in clinical use. READ MORE

  7. 5. The Non-Invasive Brain Biopsy : Implementation and Application of Quantitative Magnetic Resonance Spectroscopy on Healthy and Diseased Human Brain

    Author : Anders Tisell; Peter Lundberg; Marcel Warntjes; Anne-Marie Landtblom; Örjan Smedby; Jan Weis; Linköpings universitet; []
    Keywords : ;

    Abstract : Introduction: In this thesis, one of the major objectives was to implement a method for (absolute) quantitative magnetic resonance spectroscopy (qMRS) of the human brain, intended for clinical use. The implemented method was based on standard spatially selective MRS sequences. READ MORE