Sökning: "isocenter"

Visar resultat 1 - 5 av 17 uppsatser innehållade ordet isocenter.

  1. 1. osimetric impact of system spe cific geometric distortion on head and neck treatment plans in MRI only based radiation therapy

    Master-uppsats,

    Författare :Jesper Brovall; [2022-01-13]
    Nyckelord :Medical physics; Dosimetry; MRI; Radiation therapy;

    Sammanfattning : Background/ purpose: Because of the superior soft tissue contrast, in comparison with computed tomography (CT) data, magnetic resonance imaging (MRI) is of high interest to include in a larger extent in the ra diation therapy (RT) process. In an MRI only workflow, the CT scan is excluded and a synthetic CT is used for treatment plan ning. LÄS MER

  3. 2. Deep reinforcement learning for isocenter placement in Gamma Knife® radiosurgery

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Dmitrijs Kass; [2022]
    Nyckelord :;

    Sammanfattning : Disposition of isocenters inside the brain tumor is of paramount importance for the quality of the Leksell Gamma Knife® radiosurgery. This work presents a novel approach based on deep reinforcement learning aimed at optimizing isocenter locations. LÄS MER

  4. 3. Automation of robust Pareto front-based radiotherapy treatment planning for prostate cancer patients

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Niklas Eliasson; [2019]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Purpose/objective The main objective was to create a software that automates the process of creating treatment plans used for Pareto front-based dose planning for prostate cancer patients. A second objective/purpose was to add a robustness test to this program to evaluate the effect of prostate movements on the treatment plans. LÄS MER

  5. 4. Validation of Catalyst HD™ positioning performance using a deformable phantom

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Beatrice Akinrimisi; [2019]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Aim: The overall purpose for this master thesis was to evaluate the deformable algorithm of the optical surface scanning system Catalyst HDTM . The aim was to develop a method to evaluate the non-rigid registration algorithm using a deformable phantom and with it investigate the positioning accuracy of the depth calculation. LÄS MER

  7. 5. Surface guided radiotherapy for high precision treatments of brain metastases

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Elise Konradsson; [2018]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Purpose/Background High accuracy treatment techniques such as stereotactic radiotherapy (SRT) requires precise patient positioning prior to and during treatment. The Catalyst™ is an optical surface scanning (OSS) system that has been utilized for patient positioning and real time monitoring during radiotherapy. LÄS MER