Search for dissertations about: "laser Doppler imaging"

Showing result 6 - 10 of 51 swedish dissertations containing the words laser Doppler imaging.

  2. 6. Laser Doppler Perfusion Monitoring and Imaging especially as regards testing for sympathetic nerve function

    Author : Carolin Freccero; Kirurgi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Physiology; wavelength; sympathetic vasodilatation; sympathetic vasoconstriction; sympathetic nerve function; parasympathetic nerve function; laser Doppler perfusion imaging; laser Doppler perfusion monitoring; finger skin blood flow; fibre separation; contralateral cooling; Concentration; Fysiologi; Cardiovascular system; Kardiovaskulära systemet; Diagnostik; Diagnostics;

    Abstract : The operating principle of all laser Doppler methods is based on the fact that incident photons shift in wavelength when interacting with moving blood cells passing through the microvascular network. After photodetection and further signal processing, the recorded parameter can be considered an arbitrary measure of tissue blood flow, and this is referred to as ?perfusion?. READ MORE

  4. 7. Microvascular inflammatory response in the skin

    Author : Vladimir Evilevitch; Lunds universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; tomografi; medicinsk instrumentering; Physiology; Fysiologi; radiologi; Klinisk fysiologi; medical instrumentation; tomography; radiology; Clinical physics; sodium nitroprusside; terbutaline; anandamide; TRPV1; skin prick test; vanilloid receptor; skin microcirculation; laser Doppler imaging; Plasma exudation; vasodilatation;

    Abstract : This thesis examines the microvascular inflammatory response in the skin. The microvascular response includes vasodilatation and plasma exudation. In the first three studies, the combined response was measured in guinea pig skin with a technique based on detection of radiolabelled protein. READ MORE

  5. 8. Multi-Dimensional Quantitative Laser-based Diagnostics - Development and Practial Applications

    Author : Rikard Wellander; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Post injection; Structured illumination; Mie scattering; Dense sprays; Extinction coefficient; Signal attenuation; Laser extinction; Multiple scattering; Scattering measurements; Planar laser induced fluorescence; Time resolved; Imaging through turbulent media; Three-dimensional image acquisition; Diesel particulate filter regeneration; Wall impingent; Biodiesel; LII; Large-bore gas Engine; Pre-chamber ignition; Fysicumarkivet A:2014:Wellander;

    Abstract : Laser based optical diagnostic methods are routinely used in combustion research. Many of the more common approaches are based on illuminating a cross-section of the sample with a thin laser sheet. For example, by targeting an electronic transition in a molecule, its concentration within the plane illuminated by the laser sheet can be deduced. READ MORE

  6. 9. High resolution laser doppler imaging for microvascular blood flow measurements

    Author : Maria Lindén; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : Techniques for functional assessment of blood flow dynamics in individual microvessels are likely to become tools of increasing importance, for example in the evaluation of new vasoactive drugs. Laser Doppler perfusion Imaging (LDI) is a non- contact method for visualization of spatial and temporal blood flow dynamics. READ MORE

  7. 10. Origin and processing of laser Doppler spectra

    Author : Mikael Arildsson; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : Laser Doppler Flowmetry (LDF) is a technique for studying microvascular blood flow. Laser light is guided to the tissue and the backscattered light, after being Doppler shifted by moving Red Blood Cells (RBCs), is detected using a heterodyne process. READ MORE