Sökning: "Diffusion Tensor Imaging"

Visar resultat 31 - 35 av 50 avhandlingar innehållade orden Diffusion Tensor Imaging.

  1. 31. Manifolds in Image Science and Visualization

    Författare :Anders Brun; Hans Knutsson; Magnus Herberthson; Carl-Fredrik Westin; Roland Wilson; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; manifold learning; image analysis; signal processing; diffusion tensor mri; Medical engineering; Medicinsk teknik;

    Sammanfattning : A Riemannian manifold is a mathematical concept that generalizes curved surfaces to higher dimensions, giving a precise meaning to concepts like angle, length, area, volume and curvature. A glimpse of the consequences of a non-flat geometry is given on the sphere, where the shortest path between two points – a geodesic – is along a great circle. LÄS MER

  3. 32. Manifold learning and representations for image analysis and visualization

    Författare :Anders Brun; Hans Knutsson; Magnus Herberthson; Carl-Fredrik Westin; Reiner Lenz; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; manifold learning; image analysis; signal processing; diffusion tensor mri; Medical informatics; Medicinsk informatik;

    Sammanfattning : We present a novel method for manifold learning, i.e. identification of the low-dimensional manifold-like structure present in a set of data points in a possibly high-dimensional space. The main idea is derived from the concept of Riemannian normal coordinates. LÄS MER

  4. 33. Brain imaging and outcome in extremely preterm infants

    Författare :Béatrice Skiöld; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : In parallel to the dawn of modern neonatal intensive care, the survival after extremely preterm birth has greatly improved. These very immature children are born during a vulnerable phase of brain maturation, and are at high risk of brain injury and subsequent neurodevelopmental impairments. LÄS MER

  5. 34. Magnetic resonance imaging and advanced imaging assessment of the growth plate in the adolescent and young adult

    Författare :Ola Kvist; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The growth plate is a cartilaginous structure located between the metaphysis and epiphysis in long bones. It is the centre for longitudinal growth. Longitudinal growth has a biphasic pattern with a peak during foetal and early postnatal life and another peak during puberty. LÄS MER

  7. 35. Tracking and predicting cognitive development using magnetic resonance imaging

    Författare :Henrik Ullman; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Neuroimaging of the developing brain has helped describing and quantifying many of the biological processes underlying cognitive development. The protracted development of higher order cognitive functions has allowed detailed description of their neural correlates. LÄS MER