Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Colour Doppler"”.
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Quantification of left-to-right shunt through Patent Ductus Arteriosus by colour Doppler
… in the ascending aorta and in the ductus and a colour Doppler image was obtained simultaneously over the main pulmonary artery longitudinal cross-section including ductal inflow. The percentage of colour pixels representing ductal flow was quantified in the main pulmonary artery outlined by …
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Full 3D Blood Velocity Mapping and Flow Quantification from Doppler Echocardiographic Images
… velocity and flow within the heart using 3D colour Doppler images. The<br/>principal goal of both methods was to overcome the main limitation of Doppler<br/>systems which is that the Doppler effect only measures one component of the velocity<br/>(parallel to the beam direction). For that …
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Single Crystal Based Ultrasound Actuated Needle For Regional Anaesthesia and Biopsy
… the visibility of needle can be enhanced under colour Doppler ultrasound imaging.<br/><br/>Characterization of single crystals was first carried out to obtain the full elasto-electric matrix under ambient conditions and to determine the change in material behaviour when subject to a range of …
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Measurement of sacroiliac joint stiffness with Doppler imaging of vibrations – A reliability study
… contentious with regard to their reliability. Doppler Imaging of Vibrations (DIV) has been advocated as one alternative adjunct method of evaluating SIJ dysfunction. Purpose: The aim of this research was to test reliability of the DIV technique to assess SIJ stiffness within a normal population …
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Resonance Tracking and Vibration Stabilisation of Ultrasonic Surgical Instruments
… the visibility of standard medical needles in colour Doppler imaging. <br/>
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Enhanced biopsy and regional anaesthesia through ultrasound actuation of a standard needle
… of needle can be enhanced when observed under colour Doppler mode of ultrasound imaging. This will make the needle procedures efficient through accurate needle placement while reducing the overall procedure duration. <br/><br/>The research reported in this thesis provides an insight into the …
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Dendritische Zellen bei der Intra- und Extrauteringravidität : mögliche Bedeutung für die feto-maternale Toleranz
… gestation, ten specimens of VTP (identified by colour Doppler sonography) and five specimens of TA. VTP and TA were of the same gestational age as the IUP. Immunohistochemical staining protocols were established on paraffin sections. The following surface markers were examined on serial …
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The aetiology of pain in chronic midportion Achilles tendinopathy
… tendon pain, the grey scale ultrasound and colour Doppler characteristics in chronic AT (Chapter 3). • Evaluate the relationship between conditioned pain modulation and chronic AT (Chapter 4). • Explore and evaluate if variants in genes [COMT rs4818 (C/G), COMT rs4633 (C/T), TAC1 rs2072100 …
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Acute achilles tendon rupture. Evaluation of treatment and complications
… were screened for deep venous thrombosis using Colour Doppler Sonography (CDS). Results: The ATRS was found to be a valid and reliable patient-reported instrument with good responsiveness to measure outcome in terms of symptoms and physical activity in patients with an Achilles tendon rupture. …
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An investigation of liver blood flow in systemic inflammation
… Advances in ultrasound technology have allowed colour Doppler/ duplex scanning of the hepatic artery and portal vein trans-abdominally and allow non-invasive measurement of not only total liver blood flow but also its individual components. This technique has been shown to be reliable and …
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Fluid Dynamic Assessments of Spiral Flow Induced by Vascular Grafts
… distortion. A dual-beam two-dimensional vector Doppler technique was developed to visualise and quantify vortical structures downstream of each graft outflow in the cross-flow direction. Vorticity mapping and measurements of circulation were acquired based on the vector Doppler data. The flow …