Search for dissertations about: "Radiotherapy imaging"

Showing result 1 - 5 of 69 swedish dissertations containing the words Radiotherapy imaging.

  1. 1. Quality assurance for magnetic resonance imaging (MRI) in radiotherapy

    University dissertation from Umeå : Department of radiation sciences, Umeå university

    Author : Mary Adjeiwaah; Tufve Nyholm; Rob HN Tijssen; [2017]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Magnetic resonance imaging; Radiotherapy; geometric distortions; patient-induced susceptibilities MR-only; radiofysik; radiation physics;

    Abstract : Magnetic resonance imaging (MRI) utilizes the magnetic properties of tissues to generate image-forming signals. MRI has exquisite soft-tissue contrast and since tumors are mainly soft-tissues, it offers improved delineation of the target volume and nearby organs at risk. READ MORE

  2. 2. Verification of dose calculations in radiotherapy

    University dissertation from Umeå : Strålningsvetenskaper

    Author : Tufve Nyholm; Mikael Karlsson; Ben Mijnheer; [2008]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; radiotherapy; dose calculation; quality control; pencil kernel; MEDICINE Physiology and pharmacology Radiological research Radiological physics; MEDICIN Fysiologi och farmakologi Radiologisk forskning Radiofysik;

    Abstract : External radiotherapy is a common treatment technique for cancer. It has been shown that radiation therapy is a both clinically and economically effective treatment for many types of cancer, even though the equipment is expensive. The technology is in constant evolution and more and more sophisticated and complex techniques are introduced. READ MORE

  3. 3. Dose painting Can radiotherapy be improved with image driven dose-responses derived from retrospective radiotherapy data?

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Eric Grönlund; Anders Ahnesjö; Silvia Johansson; Daniela Thorwarth; [2019]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiotherapy; functional imaging; dose painting; dose painting by numbers; robust optimization; Medicinsk radiofysik; Medical Radiophysics;

    Abstract : The main aim of curative radiotherapy for cancer is to prescribe and deliver doses that eradicate the tumor and spare the normal healthy tissues. Radiotherapy is commonly performed by delivering a homogeneous radiation dose to the tumor. READ MORE

  4. 4. Desmoid tumors. New aspects on diagnostic procedures, treatment and outcome

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Mikael Dalén; Göteborgs universitet.; Gothenburg University.; [2006]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; desmoid; fibromatosis; surgery; radiotherapy; chemotherapy; statistics; imaging; studies; cytology; biopsy; pathology;

    Abstract : Desmoid tumor (aggressive fibromatosis) is a rare, benign fibroblastic/myofibroblasticneoplasm that originates from musculoaponeurotic structures. It never metastasizes but locallygrows aggressively and infiltrates surrounding tissues. The treatment of choice has beensurgery. However, local recurrences are frequent. READ MORE

  5. 5. 3D Verification of Dynamic and Breathing Adapted Radiotherapy using Polymer Gel Dosimetry

    University dissertation from Lund University (Media-Tryck)

    Author : Sofie Ceberg; [2010]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; radiotherapy; 3D verification; polymer gel;

    Abstract : Polymer gel dosimetry has been used since the 1990s, and several studies have shown that this detector system can be used for verification of static absorbed dose distributions in three dimensions (3D). Its unique properties, such as high resolution, normal tissue equivalence and independency of energy, field size and direction of the incident radiation, should also be advantageous for dosimetric verification of radiotherapy using today’s and tomorrow’s dynamic delivery techniques. READ MORE