Search for dissertations about: "Doppler ultrasound ."

Showing result 6 - 10 of 82 swedish dissertations containing the words Doppler ultrasound ..

  2. 6. Testing of Doppler Ultrasound Systems

    Author : Andrew Walker; Per Ask; Ivar Ringqvist; Bengt Wranne; Birger Wandt; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : Blood and tissue velocities are measured and analyzed in cardiac, vascular, and other applications of diagnostic ultrasound. Errors in system performance might give invalid measurements.We developed two moving string test targets and a rotating cylinder phantom (Doppler phantoms) to characterize Doppler ultrasound systems. READ MORE

  4. 7. Ultrasound in the management of women with post-menopausal bleeding

    Author : Elisabeth Epstein; gynekologisk och prenatal ultraljudsdiagnostik Obstetrisk; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; gynaecology; Obstetrics; observer variation; reproducibility; vascularity index; power Doppler; hydrosonography; biopsy; ultrasound; post-menopausal bleeding; malignancy; Endometrium; andrology; reproduction; sexuality; Obstetrik; gynekologi; andrologi; reproduktion; sexualitet;

    Abstract : The aim of this thesis was to investigate how ultrasound can be used in the diagnostic work-up of women with post-menopausal bleeding (PMB) to optimise and individualise their management. The thesis is based on six studies comprising post-menopausal women with (Study I-VI) and without (Study VI) abnormal bleeding. READ MORE

  5. 8. Fetal surveillance and outcome in postterm pregnancy

    Author : Margareta Kitlinski; gynekologisk och prenatal ultraljudsdiagnostik Obstetrisk; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; sexuality; Obstetrik; gynekologi; andrologi; reproduktion; sexualitet; reproduction; andrology; gynaecology; Obstetrics; Ultrasound.; Umbilical cord artery; Prolonged; Postterm; pH; Mortality; Morbidity; Gender; Fetal surveillance; Brain-sparing; Doppler; Blood gases; Acid-base;

    Abstract : To minimize the risk of short-term and long-term morbidity and mortality among children born postterm, studies were performed to evaluate the fetal surveillance program. (1) Male-fetus pregnancies were at an increased risk... READ MORE

  6. 9. Quantification and Visualization of Cardiovascular Function using Ultrasound

    Author : Matilda Larsson; Lars-Åke Brodin; Hans Torp; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultrasound; Tissue Doppler imaging; Speckle tracking imaging; cardiovascular function; visualization; quantification; Medical engineering; Medicinsk teknik;

    Abstract : There is a large need for accurate methods detecting cardiovascular diseases, since they are one of the leading causes of mortality in the world, accounting for 29.3% of all deaths. READ MORE

  7. 10. Power Doppler - Principles and Potential Clinical Applications

    Author : Anders Nilsson; PG Lindgren; Torbjörn Andersson; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; Ultrasonography; Doppler studies; Power Doppler; Volume flow; Radiologisk forskning; Radiological research; Radiologisk forskning;

    Abstract : The purpose of this work was to: a) Determine whether the amount of colour in a power Doppler image is dependent on the angle between the examined vessel and the soundbeam and/or on the velocity of the flow within the vessel; b) Investigate if a dependency on flow velocity could be used for the detection of volume flow differences and c) Define clinical applications utilising the improved sensitivity to low flow of PD.In the experimental studies (study I and II) a silicon tube in a water bath was insonated, the insonation angle and the volume flow changed and the resulting images stored, transferred to a personal computer and analysed with regard to the amount of colour present in the image. READ MORE