Search for dissertations about: "Radiation physics"

Showing result 1 - 5 of 696 swedish dissertations containing the words Radiation physics.

  1. 1. MRI-Only Radiotherapy of Prostate Cancer. Development and Evaluation of Methods to Assess Fiducial Marker Detection, Geometric Accuracy and Dosimetric Integrity

    University dissertation from Lund University: Faculty of Medicine

    Author : Christian Jamtheim Gustafsson; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; [2019]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Prostate Cancer; Radiotherapy; MRI; MRI-only; MRI-only radiotherapy; Fiducial marker; Radiotherapy treatment;

    Abstract : .... READ MORE

  2. 2. Dosimetric effects of breathing motion in radiotherapy

    University dissertation from Lund University, Faculty of Science, Department of Medical Radiation Physics

    Author : Anneli Edvardsson; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; [2018-09]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; radiotherapy; breathing motion; DIBH; interplay effects; VMAT; proton therapy; breast cancer; Hodgkin’s lymphoma; liver; dosimetry; treatment planning; medical physics;

    Abstract : The goal of radiotherapy is to deliver a homogeneous high dose of radiation to a tumour while minimising the dose to the surrounding healthy tissue. To achieve this, increasingly advanced treatment techniques, such as volumetric modulated arc therapy (VMAT) and proton therapy, have been developed. READ MORE

  3. 3. MRI Perfusion Measurements using Magnetic Susceptibility Effects: : Calibration Approaches and Contrast Agent Quantification

    University dissertation from Naturvetenskapliga fakulteten, Lunds universitet

    Author : Emelie Lind; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; [2019-02]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; contrast agent; cerebral blood flow; cerebral blood volume; mean transit time; perfusion; dynamic susceptibility contrast MRI; magnetic susceptibility;

    Abstract : Exchange of oxygen and nutrients between blood and tissue occurs at the capillary level of the blood system. The blood volume flow rate in the capillaries is often referred to as perfusion, and knowledge about perfusion provides important information about the function and viability of the tissue, for example, in patients with ischaemic stroke, cancer, and neurodegenerative diseases. READ MORE

  4. 4. Instrumentation for silicon tracking at the HL-LHC

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Rebecca Carney; Stockholms universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Instrumentation; physics; particle physics; atlas; radiation damage; neuromorphic; kalman filter; Physics; fysik;

    Abstract : In 2027 the Large Hadron Collider (LHC) at CERN will enter a high luminosity phase, deliver- ing 3000 fb 1 over the course of ten years. The High Luminosity LHC (HL-LHC) will increase the instantaneous luminosity delivered by a factor of 5 compared to the current operation pe- riod. READ MORE

  5. 5. Optimisation and Validation of Dynamic Susceptibility Contrast MRI Perfusion Measurements

    University dissertation from Lund University (Media-Tryck)

    Author : Linda Knutsson; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; [2006]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nukleärmedicin; radiobiologi; Nuclear medicine; radiobiology; radiologi; tomografi; medicinsk instrumentering; tomography; medical instrumentation; Clinical physics; cerebral blood volume; mean transit time; cerebral blood flow; perfusion; dynamic susceptibility contrast MRI arterial input function; Klinisk fysiologi; radiology;

    Abstract : The studies presented in this thesis concern the optimisation and evaluation of the dynamic susceptibility contrast magnetic resonance imaging (DSC-MRI) technique for the assessment of perfusion-related parameters of the brain, such as cerebral blood flow (CBF), cerebral blood volume (CBV) and mean transit time (MTT). Several methodological factors influence these measurements, for example, contrast-agent administration, arterial input function (AIF) registration, choice of deconvolution algorithm and the choice of pulse-sequence parameters. READ MORE