Search for dissertations about: "radiation doses"

Showing result 1 - 5 of 170 swedish dissertations containing the words radiation doses.

  1. 1. Accurate description of heterogeneous tumors for biologically optimized radiation therapy

    Author : Johan Nilsson; Bengt Lind; Anders Brahme; Margareta Edgren; Søren Bentzen; Stockholms universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; heterogeneous tumors; radiation therapy; biological optimization; tumor hypoxia; effective radiation sensitivity; effective radiation resistance; Radiation biology; Strålningsbiologi;

    Abstract : In this thesis, a model of tissue oxygenation is presented, that takes into account the heterogeneous nature of tumor vasculature. Even though the model is rather simple, the resulting oxygen distributions agree very well with clinically observed oxygen distributions for most tumors and healthy normal tissues. READ MORE

  2. 2. Optimizing experimental radioimmunotherapy : investigating the different mechanisms behind radiation induced cell deaths

    Author : Theres Lindgren; David Eriksson; Torgny Stigbrand; Bo Stenerlöw; Umeå universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mitotic catastrophe; senescence; cell cycle checkpoint; apoptosis; radiation; gene expression; p53; immunologi; Immunology; radiofysik; radiation physics;

    Abstract : Background. Radiation therapy is an important treatment regimen for malignant disease. Radiation therapy uses ionizing radiation to induce DNA damage in tumor cells in order to kill them. READ MORE

  3. 3. Ethical aspects of radiation protection

    Author : Per Wikman-Svahn; John Cantwell; Gustaf Arrhenius; KTH; []
    Keywords : HUMANITIES; HUMANIORA; HUMANIORA; HUMANITIES; Radiation; risk; ethics; Philosophy subjects; Filosofiämnen;

    Abstract : This aim of this thesis is to examine ethical aspects of radiation protection from ionizing radiation. Radiation protection is the professional field that deals with the protection of humans and the environment from the harmful effects of radiation. READ MORE

  4. 4. Radiation induced biomarkers of individual sensitivity to radiation therapy

    Author : Sara Skiöld; Mats Harms-Ringdahl; Siamak Haghdoost; Mats Ljungman; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; low dose ionizing radiation; radiation sensitivity; proteomics; whole blood; 8-oxo-dG; oxidative stress; acute adverse healthy tissue effects; molekylär biovetenskap; Molecular Bioscience;

    Abstract : Fifty percent of solid cancers are treated with radiation therapy (RT). The dose used in RT is adjusted to the most sensitive individuals so that not more than 5% of the patients will have severe adverse healthy tissue effects. READ MORE

  5. 5. Secondary absorbed dose distributions and radiation quality in light ion therapy

    Author : Martha Hultqvist; Irena Gudowska; Tatsuhiko Sato; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; secondary doses; light ion therapy; radiation quality; Monte Carlo simulation; medicinsk strålningsfysik; Medical Radiation Physics;

    Abstract : Radiotherapy with light ions offers the possibility of achieving a dose distribution which is highly conformed to the target volume while sparing normal tissues. For ions heavier than protons, an additional advantage is the increased Relative Biological Effectiveness (RBE) as compared to conventional photon and electron beams. READ MORE