Sökning: "phase contrast"

Visar resultat 6 - 10 av 417 avhandlingar innehållade orden phase contrast.

  1. 6. Polymer-shelled Ultrasound Contrast Agents : Characterization and Application

    Detta är en avhandling från Stockholm : KTH

    Författare :Dmitry Grishenkov; KTH.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ultrasound; contrast agents; microbubbles; polymer; perfusion; TECHNOLOGY Engineering physics Acoustics; TEKNIKVETENSKAP Teknisk fysik Akustik; TECHNOLOGY Engineering physics Material physics with surface physics; TEKNIKVETENSKAP Teknisk fysik Materialfysik med ytfysik; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Internal medicine Cardiovascular medicine; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Invärtesmedicin Kardiovaskulär medicin; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Internal medicine Cardiology; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Invärtesmedicin Kardiologi;

    Sammanfattning : Ultrasound-based imaging technique is probably the most used approach for rapid investigationand monitoring of anatomical and physiological conditions of internal organs and tissues.Ultrasound-based techniques do not require the use of ionizing radiation making the tests anexceptionally safe and painless. LÄS MER

  2. 7. Phase-Contrast X-Ray Carbon Dioxide Angiography

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Ulf Lundström; KTH.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Phase-contrast x-ray imaging is an emerging technology, which allows for imaging of smaller features than conventional absorption-based x-ray imaging, with lower radiation dose. Instead of the attenuation that is normally used in x-ray imaging, it utilizes the phase shift introduced by an object to the transmitted x-rays. LÄS MER

  3. 8. Flow quantification using MRI techniques : evaluation and correction of errors in phase-contrast angiography, and development of a method using balanced steady-state free procession sequences

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Kerstin M Lagerstrand; Göteborgs universitet.; Gothenburg University.; [2005]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; phase-contrast; balanced steady-state free precession; test object; computer simulation; accuracy;

    Sammanfattning : .... LÄS MER

  4. 9. First-Principles Studies of Materials Properties Pressure-Induced Phase Transitions & Functional Materials

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Thanayut Kaewmaraya; Uppsala universitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Density functional theory; Pressure-induced phase transitions; Ab-initio molecular dynamic; hybrid functional; Ab-initio random structure searching; Phase change material; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : This thesis presents the first-principles studies of materials properties within the framework of the density functional theory (DFT). The thesis constitutes three main parts, i. e., pressure-induced phase transitions in solids, data-storage and clean-energy materials. LÄS MER

  5. 10. Accuracy and reproducibility in phase contrast magnetic resonance imaging

    Detta är en avhandling från Linköping : Linköpings universitet

    Författare :Per Thunberg; Linköpings universitet.; Linköpings universitet.; Linköpings universitet.; [2004]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICINE; MEDICIN;

    Sammanfattning : Magnetic resonance imaging (MRI) is an imaging modality which provides good conditions for studies of flow and motion in the cardiovascular system. When using the phase contrast imaging technique, it is possible to perform velocity measurements in moving tissues and in blood. LÄS MER