Search for dissertations about: "laser Doppler flowmetry LDF"

Showing result 1 - 5 of 29 swedish dissertations containing the words laser Doppler flowmetry LDF.

  1. 1. Laser Doppler Flowmetry and Imaging: Methodological Studies

    Author : Siv Bornmyr; Malmö Institutionen för kliniska vetenskaper; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Clinical physics; digital photography.; cold intolerance; sympathetic nervous system; flow cessation external pressure; skin temperature; thermography; skin blood flow; laser doppler imaging; Laser doppler flowmetry; radiology; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

    Abstract : Laser Doppler flowmetry (LDF) and laser Doppler imaging (LDI) are modern methods for non-invasive and continuous assessment of skin blood flow. The techniques are based on the phenomenon that monochromatic light transilluminating a perfused tissue is spectrally broadened owing to scattering by moving blood cells. READ MORE

  2. 2. Quantitative Laser Doppler Flowmetry

    Author : Ingemar Fredriksson; Tomas Strömberg; Marcus Larsson; Weindelt Stenbergen; Linköpings universitet; []

    Abstract : Laser Doppler flowmetry (LDF) is virtually the only non-invasive technique, except for other laser speckle based techniques, that enables estimation of the microcirculatory blood flow. The technique was introduced into the field of biomedical engineering in the 1970s, and a rapid evolvement followed during the 1980s with fiber based systems and improved signal analysis. READ MORE

  3. 3. Laser doppler tissue flowmetry : fiberoptic methods in microvascular research

    Author : Göran Salerud; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : Laser Doppler flowmetry (LDF) constitutes a method for measuring the flux of blood cells in the microcirculatory bed. Photons are scattered in the moving blood cells, where they undergo a frequency shift according to the Doppler principle. READ MORE

  4. 4. Sampling depth in Laser Doppler flowmetry

    Author : Anneli Jakobsson; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : The influence of probe design on the measuring depth in laser Doppler flowmetry using a 632.8 nm light source has been investigated by in vivo models and Monte Carlo simulations. Five different probe configurations were used to measure perfusion in feline intestine to which a constant blood flow was applied. READ MORE

  5. 5. Influence of optical properties on Laser Doppler Flowmetry

    Author : Marcus Larsson; Stefan Andersson-Engels; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : Laser Doppler flowmetry (LDF) is based on the principle that a Doppler shift occurs when coherent light is scattered by a moving object, i.e. red blood cell (RBC). The magnitude of these frequency shifts affects the optical beating that occurs w hen shifted and non-shifted light is mixed. READ MORE