Sökning: "perfusion"

Visar resultat 1 - 5 av 463 avhandlingar innehållade ordet perfusion.

  1. 1. On perfusion estimation using ultrasound

    Detta är en avhandling från Department of Electrical Measurements, Lund University

    Författare :Tomas Jansson; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Instrumentation technology; Speckle; Artifacts; Perfusion; Ultrasound; Doppler; Mät- och instrumenteringsteknik;

    Sammanfattning : This thesis has the main focus on ways to improve the blood perfusion estimate, as obtained from a continuous wave Doppler system. Earlier studies have shown large temporal variations in the detected perfusion estimate, due to speckle. LÄS MER

  2. 2. Quantitative Tracer Based MRI Perfusion Potentials and Limitations

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Arvid Morell; Atle Bjørnerud; Håkan Ahlström; Linda Knutsson; [2012]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MRI; Perfusion; Contrast agent; Relaxivity; Radiology; Radiologi;

    Sammanfattning : Tracer based MRI perfusion measurements is a clinically useful tool to assess regional distributions of tissue blood flow and volume. The method may be based on any of the three relaxation mechanisms T1, T1 and T2*, the latter denoted DSC-MRI being the most common. LÄS MER

  3. 3. The effect of mechanical ventilation on abdominal organs : Analysing the role of PEEP and perfusion

    Detta är en avhandling från Uppsala : Acta Universitatis Uppsaliensis

    Författare :Silvia Marchesi; Miklós Lipcsey; Anders Larsson; Göran Hedenstierna; Torbjörn Karlsson; Anders Oldner; Ragnvi Hagman; [2019]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ARDS; sepsis; abdominal inflammation; edema; perfusion; Anestesiologi och intensivvård; Anaesthesiology and Intensive Care;

    Sammanfattning : Background: The effect of mechanical ventilation on abdominal organs is not well understood and investigated yet. Previous studies, using an animal sepsis-like model, found an association between mechanical ventilation (MV) and abdominal edema and inflammation. LÄS MER

  4. 4. Movement artifact reduction in laser Doppler blood flowmetry : myocardial perfusion applications

    Detta är en avhandling från Linköping : Linköpings universitet

    Författare :MG Daniel Karlsson; Karin Wårdell; Knut Kvernebo; [2005]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICINE; MEDICIN;

    Sammanfattning : Laser Doppler perfusion monitoring (LDPM) and imaging (LDPI) enable assessment of tissue microvascular perfusion. The techniques are based on the Doppler broadening of the optical spectrum occurring when coherent laser light is scattered by moving red blood cells (RBC). LÄS MER

  5. 5. On potentials and limitations of perfusion MRI in neurological disorders

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Markus Fahlström; Mark Lubberink; Adam Espe Hansen; [2020]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurological disease; MRI; Perfusion; 15O-water PET; Medicinsk radiofysik; Medical Radiophysics;

    Sammanfattning : Cerebral perfusion outlines several parameters which describe the status of cerebral haemodynamics. Numerous neurological diseases affect cerebral perfusion, thus the importance of diagnostic measurements. LÄS MER