Sökning: "radioactivity"

Visar resultat 1 - 5 av 40 uppsatser innehållade ordet radioactivity.

  1. 1. Jämförelse av aktivitet i urinblåsan hos 18F-PSMA-PET patienter med och utan hydrering

    Kandidat-uppsats, Malmö universitet/Fakulteten för hälsa och samhälle (HS)

    Författare :Salma Elsaid; [2023]
    Nyckelord :Activity in urinary bladder; 18F-PSMA-PET; hydration; PET-CT prostate cancer.;

    Sammanfattning : Background: Prostate cancer is the most prevalent form of cancer affecting men.In case of biochemical recurrence, positron emission tomography (PET) targeting prostate-specific membrane antigen (PSMA) on prostate tumor cells is primarily used, in combination with computed tomography (CT), for detection and localization of recurrence. LÄS MER

  3. 2. Effects of reconstruction parameters on the image quality and quantification of PET images from PET/MRI and PET/CT systems

    Master-uppsats,

    Författare :Ali Amena Hussain; [2022-03-09]
    Nyckelord :Medical physics; PET CT; PET MRI; OSEM; BPL; NEMA IQ; positron emission tomography; magnetic resonance imaging; computed tomography; ordered Subset Expectation Maximization; The Bayesian Penalized Likelihood;

    Sammanfattning : Aim: To study how reconstruction parameters affect the positron emission tomography (PET) image quality and quantitative results for the different lesion to background radioactivity ratios in three different PET systems. Introduction: Multimodality imaging that combines magnetic resonance imaging (MRI) or computed tomography (CT) with a PET system can produce medical images containing both functional and anatomical information. LÄS MER

  4. 3. ESTIMATION OF RADIATION EXPOSURE FROM NATURALLY OCCURRING RADIONUCLIDES IN FOOD AND FOODSTUFF

    Master-uppsats,

    Författare :Ida Bengtsson; [2022-01-13]
    Nyckelord :Medical physics; Naturally occurring radionuclides; committed effective dose from ingested radionuclides; Biokinetic models;

    Sammanfattning : Purpose: The main purpose of this study was to provide an estimation of the committed effective dose received by the Swedish population from naturally occurring radionuclides (NORM) in the diet. This study was also aiming to investigate the impact on the committed effective dose due to the new developments in the biokinetic model for Po 210 . LÄS MER

  5. 4. Impact of Peroxide Speciation on the Kinetics of Oxidative Dissolution of UO2

    Master-uppsats, KTH/Kemi

    Författare :Hazal Aydogan; [2022]
    Nyckelord :Spent nuclear fuel; H2O2; HCO3-; Speciation; Kinetics; Använt kärnbränsle; H2O2; HCO3-; Speciering; Kinetik;

    Sammanfattning : Slutförvaring av använt kärnbränsle måste vara säker under 100 000 år eller mer för att förhindra att miljön skadas och att människor påverkas av långlivade radionuklider. Även om anläggningar för geologiskt djupförvar är utformade för att vara hållbara i många år, kan använt kärnbränsle komma i kontakt med grundvattnet i händelse av att flera barriärer brister. LÄS MER

  7. 5. Environmental radiation measurements at Barsebäck nuclear power plant during the decommissioning phase

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Patrik Dahlström; [2022]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Background and aim: The Barsebäck nuclear power plant (NPP) units ceased operations in 1999 and 2005. Now the NPP is in the phase of decommissioning, which is a complicated process that will take many years to complete. Radiological characterization of the surrounding area is a part of the decommissioning process. LÄS MER