Essays about: "Strålterapi"

Showing result 16 - 20 of 65 essays containing the word Strålterapi.

  1. 16. Validation of Catalyst HD™ positioning performance using a deformable phantom

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Beatrice Akinrimisi; [2019]
    Keywords : Medicine and Health Sciences;

    Abstract : 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. READ MORE

  3. 17. Machine learning multicriteria optimization in radiation therapy treatment planning

    University essay from KTH/Matematisk statistik

    Author : Tianfang Zhang; [2019]
    Keywords : Radiation therapy; automated planning; machine learning; multicriteria optimization; dose mimicking; dose--volume criteria; Gaussian mixture model; expectation--maximization; exponential tilting; Strålterapi; automatisk planering; maskininlärning; flermålsoptimering; dosåterskapande; dos--volym-kriterier; gaussisk blandningsmodell; förväntning--maximering; exponentiell lutning;

    Abstract : In radiation therapy treatment planning, recent works have used machine learning based on historically delivered plans to automate the process of producing clinically acceptable plans. Compared to traditional approaches such as repeated weighted-sum optimization or multicriteria optimization (MCO), automated planning methods have, in general, the benefits of low computational times and minimal user interaction, but on the other hand lack the flexibility associated with general-purpose frameworks such as MCO. READ MORE

  4. 18. Proton Arc Therapy Optimization

    University essay from KTH/Optimeringslära och systemteori

    Author : Cecilia Battinelli; [2019]
    Keywords : ;

    Abstract : Cancer is ranked among the leading causes of death in the world. During the last decades, the development of advanced cancer treatment software has had an increasingly important role in its treatment. To treat cancer, there are many different therapies, one of which is radiation therapy. READ MORE

  5. 19. Dual Energy CT as a Foundation for Proton Therapy Treatmen Planning - A pilot study

    University essay from Umeå universitet/Institutionen för fysik

    Author : Torbjörn Näsmark; [2019]
    Keywords : Dual Energy CT; DECT; Computed Tomography; CT; Proton Therapy; Skandion;

    Abstract : The treatment plan for radiation therapy with protons is based on images from a computed tomography (CT) scanner. This is problematic since the photons in the x-ray beam from the CT scanner and the protons are affected differently by the tissue in the patient, which introduce an uncertainty in the track length of the protons. READ MORE

  6. 20. Generative Models and Feature Extraction on Patient Images and Structure Data in Radiation Therapy

    University essay from KTH/Matematisk statistik

    Author : Hanna Gruselius; [2018]
    Keywords : Variational Autoencoder; Feature extraction; Deep learning on medical images; Computed tomography; Radiation therapy;

    Abstract : This Master thesis focuses on generative models for medical patient data for radiation therapy. The objective with the project is to implement and investigate the characteristics of a Variational Autoencoder applied to this diverse and versatile data. READ MORE