Search for dissertations about: "radiation dose"

Showing result 1 - 5 of 347 swedish dissertations containing the words radiation dose.

  1. 1. Dose painting Can radiotherapy be improved with image driven dose-responses derived from retrospective radiotherapy data?

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Eric Grönlund; Uppsala universitet.; [2019]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiotherapy; functional imaging; dose painting; dose painting by numbers; robust optimization; Medicinsk radiofysik; Medical Radiophysics;

    Abstract : The main aim of curative radiotherapy for cancer is to prescribe and deliver doses that eradicate the tumor and spare the normal healthy tissues. Radiotherapy is commonly performed by delivering a homogeneous radiation dose to the tumor. READ MORE

  2. 2. Evaluation of absorbed dose and image quality in mammography

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Bengt Hemdal; Lunds universitet.; Lund University.; [2009]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; optically stimulated luminescence; radioluminescence; in vivo dosimetry; dose reduction; dose protocol; average glandular dose; absorbed dose; Breast cancer; mammography; Monte Carlo; image quality; image quality criteria; contrast-detail phantom;

    Abstract : Popular Abstract in Swedish Utvärdering av stråldos och bildkvalitet i mammografi Bröstcancer är den cancerform som är vanligast hos kvinnor. Genom tidig upptäckt med bröströntgen, mammografi, kan man behandla sjukdomen i ett tidigare stadium och därmed minska dödligheten. READ MORE

  3. 3. The microdosimetric variance-covariance method used for beam quality characterization in radiation protection and radiation therapy

    University dissertation from Stockholm : Medicinsk strålningsfysik (tills m KI)

    Author : Jan Erik Lillhök; Stockholms universitet.; [2007]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ionizing radiation; radiation quality; radiation protection; radiation therapy; microdosimetry; nanodosimetry; variance-covariance method; MEDICINE Physiology and pharmacology Radiological research Radiological physics; MEDICIN Fysiologi och farmakologi Radiologisk forskning Radiofysik; medicinsk strålningsfysik; Medical Radiation Physics;

    Abstract : Radiation quality is described by the RBE (relative biological effectiveness) that varies with the ionizing ability of the radiation. Microdosimetric quantities describe distributions of energy imparted to small volumes and can be related to RBE. READ MORE

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

    University dissertation from Göteborg

    Author : Sara Almgren; Göteborgs universitet.; Gothenburg University.; Göteborgs universitet.; Gothenburg University.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH 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;

    Abstract : 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. READ MORE

  5. 5. Development and evaluation of an independent system for absorbed dose calculations in radiotherapy

    University dissertation from Stefan Johnsson (request by e-mail)

    Author : Stefan Johnsson; Lunds universitet.; Lund University.; [2003]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; medicinsk instrumentering; tomografi; radiologi; Klinisk fysiologi; tomography; medical instrumentation; radiology; Clinical physics; cancer; Cytologi; onkologi; cancerology; oncology; Cytology; PDA; mini-phantom; in-air equivalence; primary kerma; transmission measurement; stopping power ratio; entrance dose; beam quality; quality control; error prevention; monitor unit calculation; radiation therapy; dose calculation;

    Abstract : Popular Abstract in Swedish Strålbehandling av cancerpatienter sker idag med avancerad teknik och utrustning. Förberedelserna inför behandlingen är omfattande och kräver medverkan av flera olika personalkategorier och övervakning via datoriserade verifikationssystem. READ MORE