Sökning: "Brachytherapy"

Visar resultat 1 - 5 av 22 uppsatser innehållade ordet Brachytherapy.

  1. 1. Inclusion of more sources in a commercial brachytherapy Monte Carlo

    Kandidat-uppsats,

    Författare :Philip Wiman; Emil Forsberg; Robin Vestling; [2023]
    Nyckelord :;

    Sammanfattning : Brachytherapy is a cancer treatment method where a solid radioactive source is placed inside the body in order to target cancer cells with a high dose of radiation while minimizing damage to surrounding healthy tissue. The most common method for treatment planning in brachytherapy is the TG43 formalism where the whole patient geometry is treated as water. LÄS MER

  3. 2. Deformable registration when combining brachytherapy and external beam radiotherapy

    Master-uppsats, KTH/Medicinsk avbildning

    Författare :Lisa Mach; [2021]
    Nyckelord :;

    Sammanfattning : Patients with cervical cancer are treated both with external beam radiotherapy(EBRT) and brachytherapy (BT) which involves an applicator. During the treatments, CT-images are taken and to perform dose calculations, deformable image registration (DIR) is performed. LÄS MER

  4. 3. Investigation of a Collapsed Cone Superposition Algorithm for dosimetry in brachytherapy

    Master-uppsats, Stockholms universitet/Fysikum

    Författare :Freja Alpsten; [2021]
    Nyckelord :Brachytherapy; Collapsed Cone; Model-Based Dose Calculation Algorithms; Radiotherapy;

    Sammanfattning : Background & Purpose: The current standard dosimetry in brachytherapy treatment planning, the TG-43 formalism, ignore the presence of non-water media and finite patient dimensions. This can cause clinically relevant errors in dose estimates. LÄS MER

  5. 4. Implementation of the Weighted Filtered Backprojection Algorithm in the Dual-Energy Iterative Algorithm DIRA-3D

    Master-uppsats, Linköpings universitet/Institutionen för systemteknik

    Författare :Markus Tuvesson; [2021]
    Nyckelord :wFBP; weighted Filtered Backprojection; DIRA-3D;

    Sammanfattning : DIRA-3D is an iterative model-based reconstruction method for dual-energy helical CT whose goal is to determine the material composition of the patient from accurate linear attenuation coefficients (LACs). Possible applications are, for example, to aid in calculations of radiation transport and dose calculations in brachytherapy with low energy photons, and in proton therapy. LÄS MER

  7. 5. Common features in recurrent HPV positiveoropharyngeal cancer patients– a retrospective cohort study

    Master-uppsats, Örebro universitet/Institutionen för medicinska vetenskaper

    Författare :Karolina Oxelheim; [2021]
    Nyckelord :;

    Sammanfattning : Introduction Oropharyngeal cancer (OPC) is increasing in incidence today. The cancer isdivided in to two subtypes, positive for Human papilloma virus (HPV) or negative. Previousstudies have concluded that the HPV positive type entails a better prognosis. LÄS MER