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Visar resultat 1 - 5 av 79 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Integration of MRI into the radiotherapy workflow

    Författare :Joakim Jonsson; Tufve Nyholm; Mikael Karlsson; Magnus Karlsson; Uulke van der Heide; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; magnetic resonance imaging; radiotherapy; treatment planning; image registration; workflow; radiofysik; radiation physics;

    Sammanfattning : The modern day radiotherapy treatments are almost exclusively based on computed tomography (CT) images. The CT images are acquired using x-rays, and therefore reflect the radiation interaction properties of the material. LÄS MER

  3. 2. 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

  4. 3. Evolution in changing environments revealed by fire melanism in pygmy grasshopper

    Författare :Magnus Karlsson; Anders Forsman; Karl Gotthard; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Evolution Melanism Polymorphism Pygmy grasshoppers; Biology; Biologi; Evolutionary Biology; Evolutionsbiologi;

    Sammanfattning : According to theory, genetic diversity can be maintained by environmental variation and the degree of genetic and phenotypic polymorphism may enhance the ability of populations to endure stress imposed by changing environments. In my thesis I used colour polymorphic pygmy grasshoppers (Tetrix subulata) as a model system to explore how environmental variation influenced genetic diversity. LÄS MER

  5. 4. Från Jernverk till Hjärnverk : Ungdomstidens omvandling i Ronneby under tre generationer

    Författare :Magnus Karlsson; Sociologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Sociology; David Riesman; Margaret Mead; social bonds; structure; character; cultural transformation; patterns of culture; youth; social change; life-history; Social changes; theory of social work; Sociologi; Sociala förändringar; teorier om socialt arbete;

    Sammanfattning : The place is Ronneby, a smallish town in southern Sweden. My subjects are working class and lower middle class men in Ronneby, men who — since the beginning of the century — have encountered changing conditions for reaching adulthood. LÄS MER

  7. 5. Ganglionic nerve fibres in ventral roots

    Författare :Magnus Karlsson; Jönköping University; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER