Sökning: "radiation dosage"

Visar resultat 11 - 15 av 16 avhandlingar innehållade orden radiation dosage.

  1. 11. Verification of dose calculations in radiotherapy

    Författare :Tufve Nyholm; Mikael Karlsson; Ben Mijnheer; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; radiotherapy; dose calculation; quality control; pencil kernel; Radiological physics; Radiofysik;

    Sammanfattning : External radiotherapy is a common treatment technique for cancer. It has been shown that radiation therapy is a both clinically and economically effective treatment for many types of cancer, even though the equipment is expensive. The technology is in constant evolution and more and more sophisticated and complex techniques are introduced. LÄS MER

  3. 12. Molecular investigations on chromosome 21 in relation to Down syndrome and familial congenital hypothyroidism

    Författare :Bodil Edman Ahlbom; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; Genetik; Clinical genetics; Klinisk genetik; Clinical Genetics; klinisk genetik;

    Sammanfattning : Chromosomal abnormalities as well as mutations in single genes are genetic changes that can cause syndromes or inherited diseases. Down syndrome (DS), usually a consequence of trisomy 21, is a gene dosage disorder caused by an extra copy of genes on chromosome 21, but the mechanisms whereby specific genes contribute to the clinical features of DS are not known. LÄS MER

  4. 13. Description and prediction of clinical radiosensitivity : emphasis on normal tissue reactions

    Författare :Roger Tell; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Radiotherapy; radiosensitivity; normal tissue; thyroid; cell cycle; lung injury;

    Sammanfattning : There is a range in the severity of normal tissue reactions observed when cancer patients receive radiotherapy (RT). The limits of dosage in RT have empirically been set by doses that have caused severe reactions in the most sensitive patients. The understanding of factors governing variations of radiosensitivity is therefore very important in RT. LÄS MER

  5. 14. Plastic Shrinkage Cracking In Concrete : Mitigation and Modelling

    Författare :Faez Sayahi; Mats Emborg; Andrzej Cwirzen; Hans Hedlund; Pietro Lura; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : Early-age (up to 24 hours after casting) cracking may become problematic in any concrete structure. It can have a negative influence on the aesthetics of the concrete structure, as well as decreasing the durability and serviceability by facilitating the ingress of harmful materials into the concrete bulk. LÄS MER

  7. 15. Three-dimensional guidance for Endovascular Aortic Repair

    Författare :Giasemi Koutouzi; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; anatomy deformation; CBCT; EVAR; image fusion; image guidance; image registration;

    Sammanfattning : Image fusion (IF) of preoperative computed tomography (CT) with intraoperative cone-beam CT (CBCT) is a potentially powerful tool for guidance during endovascular aortic repair (EVAR). It may improve intraoperative anatomic visualization and reduce doses of radiation and contrast medium. LÄS MER