Sökning: "PET MR"

Visar resultat 21 - 25 av 26 avhandlingar innehållade orden PET MR.

  1. 21. Enhanced block sparse signal recovery and bayesian hierarchical models with applications

    Författare :Jianfeng Wang; Jun Yu; Anders Garpebring; Jia Li; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magnetic resonance imaging; Bayesian hierarchical models; Weather Research and Forecasting; Compressive sensing; Block sparsity; Multivariate isotropic symmetric a-stable distribution; q-ratio block constrained minimal singular value;

    Sammanfattning : This thesis is carried out within two projects ‘Statistical modelling and intelligentdata sampling in Magnetic resonance imaging (MRI) and positron-emission tomography(PET) measurements for cancer therapy assessment’ and ‘WindCoE -Nordic Wind Energy Center’ during my PhD study. It mainly focuses on applicationsof Bayesian hierarchical models (BHMs) and theoretical developments ofcompressive sensing (CS). LÄS MER

  3. 22. Multimethodological imaging studies of pathophysiological mechanisms in human epilepsy

    Författare :Carolina Ciumas; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Although the pathophysiological mechanisms of human epilepsy are extensively investigated, many questions remain unanswered. One is whether idiopathic generalized epilepsies (IGE) have anatomical substrates. Another is if the functional integrity of the limbic networks in mesial temporal lobe epilepsy (MTLE) is impaired. LÄS MER

  4. 23. Ultrasound Contrast Agents Loaded with Magnetic Nanoparticles : Acoustic and Mechanical Characterization

    Författare :VeeraVenkata Satyanarayana Kothapalli; Lars-Åke Brodin; Jan Engvall; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultrasound contrast agents; SPION nanoparticles; harmonic oscillation; backscattering power; attenuation coefficient; phase velocity; nonlinear equation of motion;

    Sammanfattning : The current methodologies in body scanning diagnostic uses different simultaneous imaging modalities like Ultrasound (US), magnetic resonance imaging (MRI), single photon emission tomography (SPECT) and positron emission tomography (PET). The field requires combination of different modalities for effective use in clinical diagnostics. LÄS MER

  5. 24. Efficient Optimization Techniques for Localization and Registration of Images

    Författare :Linus Svärm; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis focuses on two problems in the field of computer vision and image analysis. The first part of the thesis deals with image localization. LÄS MER

  7. 25. Characterization and Clinical Application of Normoxic Polymer Gel in Radiation Therapy Dosimetry

    Författare :Anna Karlsson; Malmö Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; 3D dose verification; uncertainties; low-density gel; fractionation dependence; characterization; normoxic gel; polymer gel dosimetry; MRI; Physics; Fysik;

    Sammanfattning : Cancer is one of the main causes of death in the world, particularly in developing countries and is considered as a major public health problem. Radiation therapy has been an important modality for treatment of cancer for many decades. LÄS MER