Sökning: "diffusion-weighted imaging"

Visar resultat 1 - 5 av 16 uppsatser innehållade orden diffusion-weighted imaging.

  1. 1. Preprocessing for intravoxel incoherent motion analysis in the brain - Signal drift correction

    Master-uppsats,

    Författare :Amina Warsame; [2023-04-17]
    Nyckelord :Medical physics; Diffusion magnetic resonance imaging; dMRI; Intravoxel incoherent motion; IVIM;

    Sammanfattning : Diffusion magnetic resonance imaging (dMRI) is a diagnostic imaging technique that is sensitized to the movement of water molecules in tissues. Intravoxel incoherent motion (IVIM) analysis can be used to estimate blood flow in capillaries from weakly diffusion-weighted data. LÄS MER

  3. 2. Optimization of b-value Acquisition and Parameter Estimation of Intravoxel Incoherent Motion Measurements

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Ivan Rashid; [2023]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Radiotherapy is commonly used for cancer treatment, given to approximately half of all cancer patients in Sweden. Despite its widespread usage, there is currently no non-invasive and reliable imaging method that can identify regions of radiation resistance. LÄS MER

  4. 3. Deep Neural Networks for Noise Reduction and Bias Removal in MR Diffusion Signal

    Master-uppsats,

    Författare :Beqir Berisha; [2022-03-22]
    Nyckelord :Medical physics; Deep Neural network; Prostate cancer; noise; Diffusion-weighted imaging; Rician bias correction;

    Sammanfattning : The purpose of this study is to assess the potential of deep neural networks, trained by unsupervised learning, for diffusion weighted imaging (DWI) data modeling and denoising. DWI data were modeled by a biexponential model and Rician bias was corrected for. LÄS MER

  5. 4. Utvärdering av två olika diffusionsviktade sekvenser vid MR-prostata.

    Magister-uppsats, Umeå universitet/Institutionen för omvårdnad

    Författare :Jimmy Kyrk; [2022]
    Nyckelord :MRI; prostate; artifacts; comparative; diffusion; MRT; prostata; artefakter; jämförande; diffusion;

    Sammanfattning : Bakgrund: Protokollet som används för att underundersöka MR-prostata innehåller en uppsättning förutbestämda sekvenser enligt PI-RADS riktlinjer. Diffusionsviktade bilder används för att utröna om vattenmolekyler kan röra sig fritt eller inte. Begränsad rörlighet kan tyda på patologi. LÄS MER

  7. 5. The adolescent brain on social-media : A systematic review

    Kandidat-uppsats, Högskolan i Skövde/Institutionen för biovetenskap

    Författare :Michaela Åström; [2021]
    Nyckelord :Adolescence; neuroimaging; social brain; social rewards; social-media use SMU ;

    Sammanfattning : Adolescence is an exceptional period of life, not least in terms of social and brain development. Friends become increasingly important, susceptibility to peer rejection increases, and brain regions involved in social cognition are predicted to go through major changes. LÄS MER