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Visar resultat 1 - 5 av 55 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Extending MRI to the Quantification of Turbulence Intensity

    Författare :Petter Dyverfeldt; Tino Ebbers; Krishna Nayak; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbulence intensity; cardiovascular disease; blood flow; hemodynamics; magnetic resonance imaging; generalized phase-contrast MRI; turbulent flow; Medical technology; Medicinsk teknik; Fluid mechanics; Strömningsmekanik;

    Sammanfattning : In cardiovascular medicine, the assessment of blood flow is fundamental to the understanding and detection of disease. Many pharmaceutical, interventional, and surgical treatments impact the flow. The primary purpose of the cardiovascular system is to drive, control and maintain blood flow to all parts of the body. LÄS MER

  3. 2. On drug use, multiple medication and polypharmacy in a national population

    Författare :Bo Hovstadius; Göran Petersson; Sven Tågerud; Bengt Åstrand; Björn Wettermark; Linnéuniversitetet; []
    Nyckelord :drug use; multiple medication; polypharmacy; register; prevalence; therapeutic intensity; acquisition cost.; NATURAL SCIENCES; NATURVETENSKAP; Biomedical Sciences; Biomedicinsk vetenskap;

    Sammanfattning : The application of multiple medications has successively increased during a number of years and has thereby increased the potential risks of adverse drug reactions, interactions and non-adherence to drug therapy. This may result in unnecessary health expenditure, directly due to redundant drug sales, and indirectly due to the increased hospitalization caused by drug-related problems. LÄS MER

  4. 3. Therapeutic applications of acoustic and electromagnetic energy

    Författare :Vilhelm Ekstrand; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : This thesis focuses on techniques based on electromagnetic and acoustic energy for treatment of a variety of diseases, including development of new techniques as well as improvement and evaluation of existing techniques. The subjects treated are: Provocation of heat generated thrombi in pigs. LÄS MER

  5. 4. Towards nanodosimetry: therapeutic radiation measurements using the variance method

    Författare :Linda Eliasson; Ayse Nyberg; Torbjörn Bäck; Jan Lillhök; Anja Almén; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atomic; Subatomic and Astrophysics; Atomär fysik; subatomär fysik och astrofysik;

    Sammanfattning : Understanding how radiation damage occurs in human tissue seems to lie in the knowledge of energy depositions in DNA-size volumes, with diameters typically around a few nanometres. In such small volumes the energy transfers are stochastic and described using distributions of events along a particle track and relevant mean values. LÄS MER

  7. 5. Improving the therapeutic ratio of stereotactic radiosurgery and radiotherapy

    Författare :Bahram Andisheh; Bengt Lind; John Hopewell; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optimization; stereotactic radiosurgery; stereotactic radiotherapy; radiobiology; modeling; Medical Radiation Physics; medicinsk strålningsfysik;

    Sammanfattning : New methods of high dose delivery, such as intensity modulated radiation therapy (IMRT), stereotactic radiation therapy (SRT) or stereotactic radiosurgery (SRS), hadron therapy, tomotherapy, etc., all make use of a few large fractions. LÄS MER