Sökning: "elasticity imaging technique"

Hittade 5 avhandlingar innehållade orden elasticity imaging technique.

  1. 1. Ultrasound based shear wave elastography of the liver : a non-invasive method for evaluation of liver disease

    Författare :Marie Byenfeldt; Anders Elvin; Per Fransson; Odd Helge Gilja; Umeå universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Anthropometric measurement; diagnostic imaging; elasticity imaging technique; blood supply; BMI; body position; fatty liver; liver disease; hepatic steatosis; liver fibrosis; liver stiffness; obesity; postural change; pressure; probe; sex characteristic; shear wave elastography; skin-to-liver capsule distance; transducer and ultrasonography; Radiography; radiografi;

    Sammanfattning : Background: Detecting liver disease at an early stage is important, given that early intervention decreases the risk of developing cirrhosis and subsequently hepatocellular cancer (HCC). The non-invasive ultrasound-based shear wave elastography (SWE) has been used clinically for a decade to assess liver stiffness. LÄS MER

  2. 2. Development and evaluation of non-invasive ultrasonic methods for arterial characterization

    Författare :Anders Eriksson; Avdelningen för Biomedicinsk teknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Instrumentation technology; TDI; Tissue Doppler imaging; Arterial characterization; Non-invasive; Flow generation; PWV; Pulse wave velocity; Mät- och instrumenteringsteknik; Ultrasound; Vascular impedance;

    Sammanfattning : As cardiovascular diseases have been the most common cause of mortality in the western world for decades, the demand for appropriate diagnostic methods is obvious. To facilitate the examination non-invasive methods are preferable since they do not require sensors within the circulation system. LÄS MER

  3. 3. Methods for measurement of vocal fold vibration and viscoelasticity

    Författare :Hans Larsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; High-speed video imaging; kymography; acoustic analysis; vocal fold vibration; glottal edge; glottal area; laser; mucosal wave; triangulation; vocal fold; vocal fold length; vocal fold width; vocal fold strain; non-invasive; vocal fold scarring; air pulse stimulation;

    Sammanfattning : The overall aim of the thesis was to develop new methods for analysis of vocal fold vibrations and viscoelasticity and to test them in human subjects. In Study I the onset of vibration and irregular vocal fold vibration was examined with laryngoscopy using a high-speed camera at a frame rate of about 2000 images/sec. LÄS MER

  4. 4. The role of new ultrasound modalities to refine the diagnostic workup on women with cervical carcinoma

    Författare :Kolbrún Pálsdóttir; Karolinska Institutet; Karolinska Institutet; []

    Sammanfattning : Background: Cervical cancer is the fourth most common female cancer in the world and has traditionally been clinically staged not including imaging. Despite that, clinicians depend on diagnostic imaging in the management of patients to triage them to treatment. LÄS MER

  5. 5. Vascular function in bicuspid aortic valve disease

    Författare :Johan Petrini; Karolinska Institutet; Karolinska Institutet; []

    Sammanfattning : The aortic valve normally consists of three cusps (tricuspid aortic valve, TAV), but in 0.5-2% of the population it consists of only two cusps (bicuspid aortic valve, BAV), which is the most common congenital cardiac malformation. LÄS MER