Sökning: "IMRT"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet IMRT.

  1. 1. Nasopharyngeal carcinoma: past, present and future directions

    Författare :Zahra Taheri-Kadkhoda; Göteborgs universitet; []
    Nyckelord :Nasopharyngeal carcinoma; radiotherapy; side effects; 3DCRT; Intracavitary brachytherapy; IMRT; IMPT; LMP1; EGFR.; radiotherapy; side effects; 3DCRT; Intracavitary brachytherapy; IMRT; IMPT; LMP1; EGFR;

    Sammanfattning : Nasopharyngeal carcinoma (NPC) is a rare disease in Sweden. The purpose of this thesis was to investigate the clinicopathological manifestations of the disease and its treatment outcomes in a cohort of Swedish NPC patients to identify key features for future improvements in patient care. LÄS MER

  3. 2. On Quality in Radiotherapy Treatment Plan Optimisation

    Författare :Hunor Benedek; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Pareto optimisation; Pareto fronts; Dose prediction; Machine learning; Deliverable treatment plans; Volumetric modulated arc therapy; IMRT; patient-specific plan quality; plan quality; Multi Criteria Optimisation; Automated Treatment Planning;

    Sammanfattning : Radiotherapy is one of the essential treatments used in the fight against cancer. The goal of radiotherapy is to deliver a high dose of ionising radiation to the tumour volume and at the same time minimise the effect on healthy tissue by reducing the radiation to critical organs. LÄS MER

  4. 3. Development of improved radiation therapy techniques using narrow scanned photon beams

    Författare :Björn Andreassen; Anders Brahme; Håkan Danared; Roger Svensson; Antony Lomax; Stockholms universitet; []
    Nyckelord :IMRT; Scanned photon beams; PET-CT treatment verification; Monte Carlo; NATURAL SCIENCES; NATURVETENSKAP; Medical Radiation Physics; medicinsk strålningsfysik;

    Sammanfattning : The present thesis is focused on the development and application of narrow scanned high energy photon beam for radiation therapy. The introduction of physically and biologically optimized intensity modulated radiation therapy (IMRT) requires a flexible and accurate dose delivery method to maximize the treatment outcome. LÄS MER

  5. 4. Energy and intensity modulated radiation therapy with electrons

    Författare :Lennart Olofsson; Mikael Karlsson; Magnus Karlsson; Björn Zackrisson; Erik Traneus; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiation sciences; Radiation therapy; Conformal therapy; IMRT; Electrons; Electron treatment head; Electron MLC; Bremsstrahlung reduction; Integral dose; Penumbra; Output factor; Strålningsvetenskap; Radiation biology; Strålningsbiologi; radiofysik; radiation physics;

    Sammanfattning : In recent years intensity modulated radiation therapy with photons (xIMRT) has gained attention due to its ability to reduce the dose in the tissues close to the tumour volume. However, this technique also results in a large low dose volume. LÄS MER

  7. 5. Nonlinear Programming - Robust Models and Applications

    Författare :Christoffer Cromvik; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optimization; robustness; multi-objective optimization; stochastic mathematical programs with equilibrium constraints; conditional value-at-risk; IMRT; traffic network design; airbag folding; Origami; airbag folding;

    Sammanfattning : The major theme of this thesis is nonlinear programming with an emphasis on applications and robust models. The thesis has two parts. The first three papers comprise the first part. Here, we discuss robustness properties of optimal solutions to a variety of models. LÄS MER