Sökning: "Diffusion Weighted Imaging"

Visar resultat 16 - 20 av 20 uppsatser innehållade orden Diffusion Weighted Imaging.

  1. 16. Orientation of Sticks and Spheres - Estimating Tensor Shape and Orientation Distribution using Diffusion NMR

    Master-uppsats, Lunds universitet/Biofysikalisk kemi

    Författare :Mikael Leveau Novén; [2015]
    Nyckelord :Diffusion NMR; ODF; NMR; Diffusion; biophysical chemistry; biofysikalisk kemi; Chemistry; Technology and Engineering;

    Sammanfattning : The diffusion characteristics of water can be measured by using NMR methods. Specifically, the diffusion profiles in samples containing domains of water barriers are of major importance to be able to describe in applications such as diffusion tensor imaging or diffusion MRI-sequences. LÄS MER

  3. 17. Optimization of Magnetic Resonance Diffusion Tensor Imaging for Visualization and Quantification of Periprostatic Nerve Fibers

    Master-uppsats, KTH/Skolan för teknik och hälsa (STH)

    Författare :Mats Nordbrøden; [2015]
    Nyckelord :Diffusion tensor imaging; Diffusion-weighted imaging; Magnetic resonance imaging; Nerve-sparing prostatectomy; Prostate cancer; Quantitative analysis; Tractography;

    Sammanfattning : Prostatectomy, surgical resection of the whole prostate is a common treatment for high- risk prostate cancer. Common side effects include long-time urinary and or erectile dysfunction due to damage inflicted to periprostatic nerves. LÄS MER

  4. 18. Protocol optimization of the filter exchange imaging (FEXI) sequence and implications on group sizes : a test-retest study

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för informationsteknologi

    Författare :Björn Lampinen; [2012]
    Nyckelord :DWI; diffusion; FEXI; MRI; fisher information; CRLB; active imaging;

    Sammanfattning : Diffusion weighted imaging (DWI) is a branch within the field of magnetic resonance imaging (MRI) that relies on the diffusion of water molecules for its contrast. Its clinical applications include the early diagnosis of ischemic stroke and mapping of the nerve tracts of the brain. LÄS MER

  5. 19. Diffusion Tensor Imaging in the Cervical Spinal Cord: Implementing methods for acquisition, processing and evaluation

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Filip Szczepankiewicz; [2011]
    Nyckelord :MRI; Medicine and Health Sciences;

    Sammanfattning : Diffusion tensor magnetic resonance imaging (DT-MRI or DTI) is an imaging technique that is sensitive to the diffusion movement of water contained in tissue. It is used to quantify parameters such as the diffusivity and its directionality. LÄS MER

  7. 20. Denoising of Complex MRI Data by Wiener-like Filtering in the Wavelet Domain - Application to High b-value Diffusion Weighted Imaging

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Adnan Bibic; [2006]
    Nyckelord :MRI; Medicine and Health Sciences;

    Sammanfattning : Noise is a well-known problem in many imaging modalities. In magnitude magnetic resonance images, obtained by quadrature detection, the associated Rician distribution of noise constitutes a further complication. This type of noise is especially problematic at low signal-to-noise ratio (SNR) regions. LÄS MER