Sökning: "Pixel Detector"

Visar resultat 6 - 10 av 33 uppsatser innehållade orden Pixel Detector.

  1. 6. Neural Networks for Material Decomposition in Photon-Counting Spectral CT

    Uppsats för yrkesexamina på avancerad nivå, KTH/Medicinteknik och hälsosystem

    Författare :Hugo Charrier; [2022]
    Nyckelord :PCCT; X-ray; scanner; photon counting; AI; neural networks;

    Sammanfattning : Photon counting computed tomography scanners constitute a major improvement of the field of computed tomography, opening various prospective and enabling the decomposition of computed tomography images into different materials. The material decomposition algorithm, mapping photon counts to material pathlengths, relies on a forward model with Poisson statistics. LÄS MER

  3. 7. Dead layer determination for the new implantation detector of the LUNDIUM decay station

    Kandidat-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Eleftheria Kosta; [2022]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : The Nuclear Structure Group in Lund, focuses on nuclear spectroscopy of decays of rare isotopes. A new decay station, called LUNDIUM, is currently being built, which will involve silicon and germanium detectors for the study of these nuclei. This thesis focuses on the characterization of one of the new silicon detectors, the implantation one. LÄS MER

  4. 8. Assessment of the Capability for Vetoing Beta-Decay Events in the Lundium Decay Station

    Kandidat-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Tanvir Sayed; [2022]
    Nyckelord :Radioactivity; Decays; Radiation; Ionisation; Superheavies; Exotic isotopes; Decay spectroscopy; Semiconductors; Silicon-Strip Detectors; Lundium; Vetoing; Electron spread; Particle identification; Physics and Astronomy;

    Sammanfattning : Alpha decay spectroscopy using the latest and most sensitive detector setup as well as fast sampling read-out electronics has become very important for discovery and analysis of short-lived nuclei created in collision experiments in the laboratory. The Nuclear Structure Group in Lund is currently developing the Lundium Decay Station for use in comprehensive nuclear spectroscopy of decays for rare isotopes, particularly in the heavy & superheavy region. LÄS MER

  5. 9. High resolution x-ray imaging by measuring the induced charge distribution

    Master-uppsats, KTH/Fysik

    Författare :Zihui Jin; [2022]
    Nyckelord :Computed tomography; photon-counting detector; silicon; spatial resolution; Datortomografi; fotonräknande detektor; kisel; spatial upplösning;

    Sammanfattning : Computed tomography (CT) is a medical imaging technique used to create cross-section images of human bodies based on x-rays. The emerging photon-counting CT detector shows several advantages compared with the traditional energy integrating detector. LÄS MER

  7. 10. Material decomposition using a photon counting X-ray detector in low energy range

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Rasmus Solem; [2021]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Material decomposition in X-ray imaging is used to separate different materials or elements in an image and to quantify their respective concentration. The material decomposition and quantification are made possible by the dependency of attenuation on the attenuating material and photon energy. LÄS MER