Sökning: "nuclear dynamic"

Visar resultat 1 - 5 av 172 avhandlingar innehållade orden nuclear dynamic.

  1. 1. Optimisation and Validation of Dynamic Susceptibility Contrast MRI Perfusion Measurements

    Författare :Linda Knutsson; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nukleärmedicin; radiobiologi; Nuclear medicine; radiobiology; radiologi; tomografi; medicinsk instrumentering; tomography; medical instrumentation; Clinical physics; cerebral blood volume; mean transit time; cerebral blood flow; perfusion; dynamic susceptibility contrast MRI arterial input function; Klinisk fysiologi; radiology;

    Sammanfattning : The studies presented in this thesis concern the optimisation and evaluation of the dynamic susceptibility contrast magnetic resonance imaging (DSC-MRI) technique for the assessment of perfusion-related parameters of the brain, such as cerebral blood flow (CBF), cerebral blood volume (CBV) and mean transit time (MTT). Several methodological factors influence these measurements, for example, contrast-agent administration, arterial input function (AIF) registration, choice of deconvolution algorithm and the choice of pulse-sequence parameters. LÄS MER

  3. 2. Electrophysiological effects of contrast media. Dynamic vectorcardiographic monitoring of patients during coronary angiography

    Författare :Agneta Flinck; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Dynamic vectorcardiography; electrophysiology; contrast media; cardioangiography; adverse events;

    Sammanfattning : Objective: The aims of this work were to study, by means of dynamic vectorcardiography (VCG), the electrophysiological effects of contrast media (CM) injected into the coronary arteries and to evaluate which VCG variables are most suitable for comparing different CM. We also studied if CM-induced VCG changes differ from those seen after myocardial ischaemia. LÄS MER

  4. 3. Perfusion measurements by dynamic susceptibility MRI

    Författare :Arvid Morell; Atle Bjørnerud; Håkan Ahlström; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Diagnostic radiology; Diagnostisk radiologi; Radiology; Radiologi;

    Sammanfattning : .... LÄS MER

  5. 4. Computational patient models for simulation of dynamic gamma-camera imaging : Application to renography and peptide receptor radionuclide therapy

    Författare :Gustav Brolin; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nuclear medicine; Gamma camera; Renography; Radionuclide therapy; Internal dosimetry; Pharmacokinetics;

    Sammanfattning : Many nuclear medicine investigations rely on gamma-camera imaging to study and quantify the distribution of radiopharmaceuticals or radionuclides in the patient as a function of time. This is typically used for diagnostic studies of physiological functions or for calculation of absorbed doses following radionuclide therapy. LÄS MER

  7. 5. Protein Quality Control at the Inner Nuclear Membrane – The Asi complex in Saccharomyces cerevisiae

    Författare :Marina Pantazopoulou; Per Ljungdahl; Jaspersen Sue; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nuclear envelope; nuclear quality control NQC ; ubiquitin; proteasome; inner nuclear membrane-associated degradation INMAD ; Cell Biology; cellbiologi;

    Sammanfattning : The nuclear envelope is a barrier comprised of outer and inner membranes that separate the cytoplasm from the nucleoplasm. The outer (ONM) and inner (INM) membranes have different physical characteristics and protein compositions. LÄS MER