Sökning: "Doppler ultrasound"

Visar resultat 1 - 5 av 78 avhandlingar innehållade orden Doppler ultrasound.

  1. 1. Ultrasound as predictor of perinatal outcome

    Detta är en avhandling från Department of Clinical Sciences, Lund University

    Författare :Gisela Ghosh; Lund University.; Lunds universitet.; [2009]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Doppler; Ultrasound; fetus; amniotic fluid index; nuchal cord; uterine artery; umbilical vein; fetal growth restriction; umbilical artery; pulsation; pregnancy;

    Sammanfattning : The aim of the work described in this thesis was to evaluate the value of ultrasound examinations of the amniotic fluid, umbilical cord and blood flow velocity waveform of the fetal and placental vessels as predictors of the perinatal outcome. In the first study, the amniotic fluid index (AFI) measured on admission to the labour ward was evaluated in low-risk pregnancies. LÄS MER

  2. 2. Postpartum Ultrasound

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Ajlana Mulic-Lutvica; Uppsala universitet.; [2007]
    Nyckelord :Medicine; Postpartum ultrasound; Uterine artery Doppler; Retained placental tissue; Secondary postpartum hemorrhage; Puerperium; Endometritis postpartum; Cesarean section; Medicin;

    Sammanfattning : This study was undertaken to investigate the involutional changes of the uterus and uterine cavity by ultrasound (US), gray-scale and Doppler, after normal delivery, and to compare with the corresponding findings from women with puerperal complications, particularly retained placental tissue (RPT). The overall design was exploratory and prospective, with the use of descriptive statistics for analysis. LÄS MER

  3. 3. On perfusion estimation using ultrasound

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

    Författare :Tomas Jansson; Lund University.; Lunds universitet.; [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

  4. 4. Ultrasound Doppler Based In-Line Rheometry - Development, Validation and Application

    Detta är en avhandling från SIK - Svenska Livsmedelsinstitutet

    Författare :Johan Wiklund; Lund University.; Lunds universitet.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknik; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Food and drink technology; Livsmedelsteknik; Technological sciences; non-Newtonian; Chemistry; Kemi; process control; In-line rheometry; Doppler; process monitoring; ultrasound;

    Sammanfattning : The trend within fluid industry is towards continuous production, leading to an increasing demand for new and improved methods that allow real-time monitoring of quality parameters and fast process control. The consistency and viscosity can be described by fluid rheology and are frequently used as quality control parameters. LÄS MER

  5. 5. Experimental verification of tomographic measurement methods in ultrasound

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

    Författare :Monica Almqvist; Lund University.; Lunds universitet.; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; airborne.; high resolution; characterization; tomography; light diffraction; doppler; ultrasound; vector tomography; Instrumentation technology; Mät- och instrumenteringsteknik;

    Sammanfattning : This thesis describes two different measurement methods applied to ultrasound. The first method, Ultrasound doppler vector tomography, uses ultrasound to measure blood flow and the second method, Light diffraction tomography, measures the pressure field in an ultrasound beam with laser light. LÄS MER