Sökning: "fluence rate"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden fluence rate.

  1. 1. Spectral Computed Tomography with a Photon-Counting Silicon-Strip Detector

    Författare :Mats Persson; Mats Danielsson; Hans Bornefalk; Jiang Hsieh; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photon-counting; silicon-strip detector; spectral computed tomography; ring artifacts; fluence rate; basis material decomposition; sub-pixel information; Fysik; Physics;

    Sammanfattning : Computed tomography (CT) is a widely used medical imaging modality. By rotating an x-ray tube and an x-ray detector around the patient, a CT scanner is able to measure the x-ray transmission from all directions and form an image of the patient’s interior. LÄS MER

  3. 2. Aspects of Fluorescence diagnostics and photodynamic therapy of non-melanoma skin cancer

    Författare :Carin Sandberg; Göteborgs universitet; []
    Nyckelord :Fotodynamisk terapi; fluorescence diagnostik; non-melanoma skin cancer; actinic keratosis; aminolaevulinic acid; fluorescence contrast; methylaminolaevulinic acid; microdialysis; pain; photodynamic therapy;

    Sammanfattning : Aspects of fluorescence diagnostics and photodynamic therapy in non-melanoma skin cancer. Carin Sandberg Department of Dermatology and Venereology, Institute of Clinical Sciences at Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. LÄS MER

  4. 3. Simulation of consolidation processes by eulerian two-fluid models

    Författare :Katarina Gustavsson; KTH; []
    Nyckelord :;

    Sammanfattning : The objective of this report is to study a model of agravity and shear induced consolidation process of a dense,flocculated suspension.The suspension is modeled as a two-constituent mixture of afluid and solid particles by an Eulerian two-phase fluid model. LÄS MER

  5. 4. New Efficient Detector for Radiation Therapy Imaging using Gas Electron Multipliers

    Författare :Janina Östling; Mats Danielsson; Anders Brahme; Fabio Sauli; Stockholms universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Portal imaging; Gas Electron Multiplier; Gas detector; Medical engineering; Medicinsk teknik;

    Sammanfattning : Currently film is being replaced by electronic detectors for portal imaging in radiation therapy. This development offers obvious advantages such as on-line quality assurance and digital images that can easily be accessed, processed and communicated. LÄS MER

  7. 5. Novel Technologies for Mode-Locking of Solid-State Lasers

    Författare :Niels Meiser; Valdas Pasiskevicius; Steinmeyer Günter; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; laser; mode-locked laser; pulsed laser; quantum dot; carbon nanotube; nonlinear optics; saturable absorber; Kerr-lens mode-locking; ultra-fast laser; picosecond laser; pulsed laser; semiconductor saturable absorber;

    Sammanfattning : The subject of this thesis is the investigation of novel technologies for mode-locking of diode-pumped, solid-state lasers. Novel saturable absorbers are used: quantum dots (QDs) and carbon nanotubes (CNTs), which both are low-dimensional nano-formations. In addition, mode-locking by cascaded nonlinearities is explored. LÄS MER