Search for dissertations about: "Diffusion Tensor Imaging"

Showing result 11 - 15 of 50 swedish dissertations containing the words Diffusion Tensor Imaging.

  2. 11. Variational Tensor-Based Models for Image Diffusion in Non-Linear Domains

    Author : Freddie Åström; Michael Felsberg; George Baravdish; Reiner Lenz; Christoph Schnörr; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; image diffusion; variational formulation; denoising; tensor; non-linear;

    Abstract : This dissertation addresses the problem of adaptive image filtering.Although the topic has a long history in the image processing community, researchers continuously present novel methods to obtain ever better image restoration results. READ MORE

  4. 12. Optimisation in strategies in diffusion tensor MR imaging

    Author : Stefan Skare; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Diffusion tensor; magnetic resonance imaging; optimisation; artefacts;

    Abstract : With diffusion MR imaging, the Brownian motion (or self-diffusion) of water molecules is measured. In the corresponding ADC (Apparent Diffusion Coefficient) image, each image element (voxel) represents the average diffusion. In MRI, the diffusion is measured with diffusion gradients along certain directions in space. READ MORE

  5. 13. Developing novel diffusion MRI methods for comprehensive analysis of restricted and anisotropic self-diffusion system

    Author : Hong Jiang; Fysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MRI; diffusion; tissue microstructure; heterogeneity; diffusion encoding; q-vector; ;

    Abstract : Diffusion MRI is a non-invasive imaging technique used to study the microstructural properties of biological tissues by observing the self-diffusion of water molecules. Traditional diffusion MRI methods, based on the pulsed gradient spin-echo sequence, employ magnetic field gradients to encode information about translational motion. READ MORE

  6. 14. Brain Tumor Imaging and Treatment Effects. Imaging findings and cognitive function in glioblastoma patients

    Author : Anna Rydelius; Lund Neurologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Glioblastoma; Imaging finding; Quantitative volumetry; Cognitive function; Diffusion tensor imaging DTI ; Treatment effect; Radiotherapy; VMAT; Parametric response maps PRM ; Treatment responce prediction;

    Abstract : AbstractBackground: Glioblastoma is the most common malignant brain tumor. Operation with maximal resection, if feasible, otherwise biopsy followed by radiotherapy and chemotherapy with temozolomide is standard therapy. The prognosis remains poor, with median overall survival being 15 months despite therapy. READ MORE

  7. 15. Probing brain microstructure with multidimensional diffusion MRI: Encoding, interpretation, and the role of exchange

    Author : Björn Lampinen; Lund Medicinsk strålningsfysik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MRI; Diffusion; Human; Brain; Microstructure; Fysicumarkivet A:2021:Lampinen;

    Abstract : Diffusion MRI (dMRI) is a non-invasive probe of human brain microstructure. It is a long-standing promise to use dMRI for ‘in vivo histology’ and estimate tissue quantities. However, this faces several challenges. First, the microstructure models used for dMRI data are based on assumptions that may cause erroneous interpretations. READ MORE