Essays about: "brachytherapy"

Showing result 1 - 5 of 19 essays containing the word brachytherapy.

  1. 1. Deformable registration when combining brachytherapy and external beam radiotherapy

    University essay from KTH/Medicinsk avbildning

    Author : Lisa Mach; [2021]
    Keywords : ;

    Abstract : 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. READ MORE

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

    University essay from Stockholms universitet/Fysikum

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

    Abstract : 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. READ MORE

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

    University essay from Linköpings universitet/Institutionen för systemteknik

    Author : Markus Tuvesson; [2021]
    Keywords : wFBP; weighted Filtered Backprojection; DIRA-3D;

    Abstract : 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. READ MORE

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

    University essay from Örebro universitet/Institutionen för medicinska vetenskaper

    Author : Karolina Oxelheim; [2021]
    Keywords : ;

    Abstract : 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. READ MORE

  5. 5. Predicting toxicity caused by high-dose-ratebrachytherapy boost for prostate cancer

    University essay from Örebro universitet/Institutionen för medicinska vetenskaper

    Author : Dalia Estefan; [2019]
    Keywords : Prostate cancer; Radiation induced toxicity; Predictive model; Combination therapy; High-dose-rate brachytherapy boost;

    Abstract : Introduction Treating localized prostate cancer with combination radiotherapy consisting ofexternal beam radiotherapy (EBRT) and high-dose-rate brachytherapy (HDR-BT) has beenproven to result in better disease outcome than EBRT only. There is, however, a decreasingtrend in utilization of combination therapy, partially due to concerns for elevated toxicityrisks. READ MORE