Sökning: "dose rate"

Visar resultat 6 - 10 av 471 avhandlingar innehållade orden dose rate.

  1. 6. Studies on the Gamma Radiation Environment in Sweden with Special Reference to 137Cs

    Författare :Sara Almgren; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; gamma radiation; caesium; 137Cs; deposition; migration; precipitation; in situ; CDE; NWF; Chernobyl; soil sampling; field measurements; dose measurements; dose rate; TLD; natural radiation; Kriging;

    Sammanfattning : Gamma radiation in the environment today mainly originates from naturally occurring radionuclides, but anthropogenic radionuclides, such as 137Cs, contribute in some areas. In order to assess population exposure in case of fallout from nuclear weapons (NWF) or accidents, knowledge and monitoring of external gamma radiation and radionuclide concentrations in the environment is important. LÄS MER

  3. 7. Adolescent Idiopathic Scoliosis. The Role of Low Dose Computed Tomography

    Författare :Kasim Abul-Kasim; Malmö Diagnostisk radiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; low-dose spine CT; effective dose; screw misplacement; adolescent idiopathic scoliosis; outcome.; titanium screws; image quality; neurovascular complication; phantom;

    Sammanfattning : Continuous implementation of new operative methods for correction and stabilization of spinal deformities in young patients with AIS demands a detailed morphological analysis of the vertebral column. CT spine according to protocols available in daily clinical practice means high radiation dose to these young individuals. LÄS MER

  4. 8. Aspects of dose, dose rate and radioisotopes in brachytherapy of uveal melanoma

    Författare :Maria Fili; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Uveal melanomas constitute melanomas arising from the choroid, the ciliary body or the iris, and in adults stands for the most common primary malignant intraocular tumor. It has a high risk of metastatic spread followed by inevitable death, and unfortunately the prognosis has not improved over the last decades. LÄS MER

  5. 9. Radiofrequency fields : exposure, dose and health

    Författare :Jonna Wilén; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electromagnetic fields; SAR; Specific Absorption; subjective symptoms;

    Sammanfattning : The overall aim of this thesis is to increase our knowledge of relevant exposure parameters when discussing possible health implication from exposure to radiofrequency electromagnetic fields (RF), especially effects that might occur at non-thermal levels.In this thesis an effort is made to broaden the exposure assessment and to take the exposure time into account and combine it with the Specific Absorption Rate (SAR) and the field parameters (electric and magnetic field strength) to approach a dose concept. LÄS MER

  7. 10. Thyroid Stunning. Effect of Absorbed Dose, Dose Rate and Type of Radiation

    Författare :Charlotta Lundh; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : .... LÄS MER