Search for dissertations about: "beam convolution"

Found 5 swedish dissertations containing the words beam convolution.

  1. 1. Modelling and measuring transport in fusion plasmas

    Author : Istvan Pusztai; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; fusion plasmas; ITG stability; microinstabilities; de-convolution; Lorentz operator; gyrokinetic equation; transport; quasilinear flux; beam emission spectroscopy; ion temperature gradient mode; electron density measurement; trapped electron response;

    Abstract : In the present thesis we consider theoretical and experimental aspects of the turbulent transport which is a crucial issue in fusion plasma physics.Experimental observations and gyrokinetic simulations show that collisions strongly influence the turbulent flux of particles. READ MORE

  2. 2. Systemic effects after ionizing radiation exposure: Genome-wide transcriptional analysis of mouse normal tissues exposed to (211)At, (131)I, or 4 MV photon beam

    Author : Britta Langen; Göteborgs universitet; Göteborgs universitet; Gothenburg University; Göteborgs universitet; Gothenburg University; []
    Keywords : microarray; radiogenomics; systemic effects; biomarker; radionuclide therapy; radionuclide therapy;

    Abstract : The radionuclides 131I and 211At are used or proposed for a variety of cancer treatments. Both radiohalogens exhibit considerable uptake in the thyroid gland and–to a lower degree–in various other tissues if they are unbound or released from a cancer-targeting agent. READ MORE

  3. 3. Radiation burden from modern radiation therapy techniques including proton therapy for breast cancer treatment - clinical implications

    Author : Anna M. Flejmer; Alexandru Dasu; Gunnar Adell; Olle Stål; Margaretha Stenmarker; Thomas Björk-Eriksson; Linköpings universitet; []
    Keywords : ;

    Abstract : The purpose of this thesis was to study the clinical implications of modern radiotherapy techniques for breast cancer treatment. This was investigated in several individual studies. READ MORE

  4. 4. Probing the early Universe with B-mode polarization : The Spider instrument, optical modelling and non-Gaussianity

    Author : Adriaan Judocus Duivenvoorden; Katherine Freese; Jón Emil Gudmundsson; Juan García-Bellido; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; cosmic microwave background; early universe; polarimetry; telescopes; Physics; fysik;

    Abstract : One of the main goals of modern observational cosmology is to constrain or detect a stochastic background of primordial gravitational waves. The existence of such a background is a generic prediction of the inflationary paradigm: the leading explanation for the universe's initial perturbations. READ MORE

  5. 5. Small-Scale Absorbed Dose Modelling in Selective Internal Radiation Therapy : Microsphere Distribution in Normal Liver Tissue

    Author : Jonas Högberg; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; clusters; dosimetry; heterogeneity; liver; microspheres; radioembolisation; simulations; SIRT; surgery; yttrium-90;

    Abstract : Radioembolisation (RE), with yttrium-90 (90Y) labelled microspheres, is an increasingly common treatment method for unresectable liver tumours. The tolerable mean absorbed dose for normal liver (NL) tissue is higher in RE than in External Beam Radiation Therapy (EBRT); absorbed dose heterogeneity is thought to be one important reason, together with a low absorbed dose rate, but the knowledge of microsphere distributions is limited. READ MORE