Search for dissertations about: "radiation safety Dissertation"

Showing result 6 - 10 of 51 swedish dissertations containing the words radiation safety Dissertation.

  1. 6. Ensuring the intended volume is given the intended absorbed dose in radiotherapy: Managing geometric variations and treatment hazards

    University dissertation from Department of Radiation Physics, Lund university

    Author : Ola Holmberg; [2004]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; medical instrumentation; tomography; radiology; Clinical physics; safety; risk; hazard; organ motion; set-up; margins; volume definition; radiotherapy; accuracy; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering; Radiopharmaceutical technology; Radiofarmaceutisk teknik;

    Abstract : Methods for ensuring that the intended volume receives the intended absorbed dose in radiotherapy have been investigated. In order to optimise radiation treatment of cancer, geometric variations in the treatment chain need to be controlled. Furthermore, hazards potentially leading to unintended irradiation need to be controlled. READ MORE

  2. 7. Numerical Modeling of Turbulent Combustion and Flame Spread

    University dissertation from Center of Combustion Science and Technology, and Department of Fire Safety Engineering, Lund University, Box 118, S-22100, Lund, Sweden

    Author : Zhenghua Yan; [1999]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Technological sciences; Flame Spread; Pyrolysis; Heat Transfer; Radiation; CFD; Turbulent Combustion Modeling; Teknik;

    Abstract : Theoretical models have been developed to address several important aspects of numerical modeling of turbulent combustion and flame spread. The developed models include a pyrolysis model for charring and non-charring solid materials, a fast narrow band radiation property evaluation model (FASTNB) and a turbulence model for buoyant flow and flame. READ MORE

  3. 8. Dose Management in Diagnostic Radiology - application of the DICOM imaging standard and a Monte Carlo dose engine for exposure surveillance

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hans-Erik Källman; Anders Ahnesjö; Hilde M. Olerud; [2017]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; metadata; DICOM; radiation safety; Monte Carlo; source model; patient model; optimization; justification; Medicinsk radiofysik; Medical Radiophysics;

    Abstract : Ionizing radiation is used in diagnostic radiology with a large contribution to the health of the patients. The regulations to limit the detrimental effects, e.g. cancer induction, are based on recommendations from the International Commission on Radiological Protection (ICRP). READ MORE

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

    University dissertation from Göteborg : University of Gothenburg

    Author : Jonas Högberg; Göteborgs universitet.; Gothenburg University.; [2015]
    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

  5. 10. Radiation-induced dysphagia in head and neck cancer - risk structures and methodological aspects

    University dissertation from Göteborgs universitet

    Author : Johanna Hedström; Göteborgs universitet.; Gothenburg University.; [2019]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; head and neck cancer; radiation therapy; dysphagia; patient-reported outcomes; quality of care;

    Abstract : Background/Aims: Swallowing difficulties are common after radiation therapy (RT) in head and neck cancer (HNC). The overall aim of this thesis was to address radiation-induced late dysphagia with regard to investigating anatomical risk structures related to the development of radiation-induced dysphagia, as well as methodological aspects in the evaluation of swallowing. READ MORE