Sökning: "Parametric images"

Visar resultat 11 - 15 av 35 avhandlingar innehållade orden Parametric images.

  1. 11. Fractal Methods for Greyscale Image Data Compression

    Författare :Mirek Novak; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this thesis fractal methods for image coding of still images are discussed. A specific class of encoding algorithms is introduced, where the algorithms are based on dividing image data into two components. One component is the part of the data which can be represented by a parametric model. LÄS MER

  3. 12. PET in Prostate Cancer – Detection, Tumour Biology and Prognosis

    Författare :Naresh Kumar Regula; Jens Sörensen; Mark Lubberink; Irina Velikyan; Katrine Riklund; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Prostate cancer; 11C-acetate; 68Ga-PSMA-11; 18F-NaF; PET CT; Radiology; Radiologi;

    Sammanfattning : Prostate cancer (PCa) is the most common non-cutaneous malignancy in men and the leading cause of cancer-related deaths in Sweden. Despite the major advances, the current diagnostic modalities fall short of standards, specifically, precise localization required for effective management of the PCa. LÄS MER

  4. 13. Optimization of paediatric CT examinations - An approach to minimize absorbed dose to patients with regard to image quality and observer variability

    Författare :Kerstin Ledenius; Göteborgs universitet; []
    Nyckelord :Computed Tomography; Paediatrics; Radiation Dosage; Computer Simulations; Nonparametric Statistics; Observer Variation; Radiographic Image Enhancement;

    Sammanfattning : The absorbed dose to paediatric patients is important bearing in mind the increased risk of radiation-induced cancer due to exposure to X-rays at young ages. Questions have also been raised of whether a CT examination of the paediatric brain might lead to a reduction in cognitive function. LÄS MER

  5. 14. Quantitative methods for tumor imaging with dynamic PET

    Författare :Ida Häggström; Anne Larsson; Mikael Karlsson; Lennart Johansson; Jens Sörensen; Magnus Dahlbom; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Dynamic positron emission tomography; PET; tumor imaging; compartment modeling; Monte Carlo; radiofysik; radiation physics;

    Sammanfattning : There is always a need and drive to improve modern cancer care. Dynamic positron emission tomography (PET) offers the advantage of in vivo functional imaging, combined with the ability to follow the physiological processes over time. LÄS MER

  7. 15. Learning to Analyze what is Beyond the Visible Spectrum

    Författare :Amanda Berg; Michael Felsberg; Jörgen Ahlberg; Robert Jenssen; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Thermal cameras have historically been of interest mainly for military applications. Increasing image quality and resolution combined with decreasing camera price and size during recent years have, however, opened up new application areas. They are now widely used for civilian applications, e.g. LÄS MER