Sökning: "DECT"

Visar resultat 1 - 5 av 15 uppsatser innehållade ordet DECT.

  1. 1. Improving proton therapy planning with photon-counting spectral computed tomography

    Master-uppsats, KTH/Fysik

    Författare :Karin Larsson; [2023]
    Nyckelord :Proton therapy; Medical imaging; Computed Tomography; Protonterapi; Medicinsk avbildning; Datortomografi;

    Sammanfattning : Proton radiation therapy is an alternative to conventional photon radiation therapy, which accounts for the majority of radiation treatments today. The rationale for using protons in radiation therapy lies in their dose deposition properties; photons deposit a radiation dose inversely proportional to the energy, and therefore tissue depth, while protons exhibit a sharp Bragg peak when traversing matter. LÄS MER

  3. 2. Integrating Eco-design Thinking in Redesigning of a Communication Device : Eco-design strategies for sustainable product design and development

    Master-uppsats, Linnéuniversitetet/Institutionen för skog och träteknik (SOT)

    Författare :Varun Kishore; [2022]
    Nyckelord :eco-design; sustainability; product development process; design for disassembly; design for dematerialisation; communication device; life cycle assessment.;

    Sammanfattning : The current wave of environmental awareness in the market has led to an increase of sustainability demands by the consumers. The focus of manufacturing companies has increasingly shifted from end-of-pipe solutions to the environmental performance of products and services. LÄS MER

  4. 3. Iodine Quantification Using Dual Energy Computed Tomography and applications in Brain Imaging

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Veronica Fransson; [2019]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Purpose/Background Dual Energy Computed Tomography (DECT) have been clinically available for over ten years. Two such systems are currently used at Skane University Hospital (SUS) in Lund. By utilizing materials different attenuating properties at different energies, material decomposition and iodine quantification is possible. LÄS MER

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

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

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

    Sammanfattning : 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. LÄS MER

  7. 5. Electromagnetic field and neurological disorders Alzheimer´s disease, why the problem is difficult and how to solve it

    M1-uppsats, Uppsala universitet/Logopedi

    Författare :Peter Lyttkens; [2018]
    Nyckelord :Alzheimer; oxidative stress; EMF; microwave; VGCC; ACh; protein refolding; APOE; big data; FINGER; wifi; DECT; AChE; DNA-damage; mobile phone; glucose metabolism; demyelinating; antioxidant defence; defective proteins; non thermal effects; Alzheimer risk; pathophysiology; mechanism; amyloid pathologies; multifactor strategy; diet; exercise; cognitive training; vascular risk management; exposure; sleep disturbance; circadian dysfunction; neuropsychiatric symptom; risk assessments;

    Sammanfattning : .... LÄS MER