Sökning: "X-Ray Computed Tomography"
Visar resultat 21 - 25 av 65 uppsatser innehållade orden X-Ray Computed Tomography.
21. Material decomposition using a photon counting X-ray detector in low energy range
Master-uppsats, Lunds universitet/SjukhusfysikerutbildningenSammanfattning : 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
22. Synchrotron X-ray Tomography Study of Bone-implant Integration
Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknikSammanfattning : Implant loosening is a recurring problem in the field of orthopedics, typically resulting in a physical and financial burden for the patient. Proper integration of orthopedic implants within host bones is a fundamental requirement for the successful function and limited risk of failure of implants which, in-vivo, must support various loading conditions. LÄS MER
23. Learning the Forward Operator in Photon-Counting Computed Tomography
Master-uppsats, KTH/Matematik (Avd.)Sammanfattning : Computed Tomography (CT) is a non-invasive x-ray imaging method capable of reconstructing highly detailed cross-sectional interior maps of an object. CT is used in a range of medical applications such as detection of skeletal fractures, organ trauma and artery calcification. LÄS MER
24. Evaluation of the Impact of X-ray Tube Voltage and Filter Thickness on the Performance of Spectral Photon-Counting Detectors
Kandidat-uppsats, KTH/Medicinteknik och hälsosystemSammanfattning : During the past years photon-counting detectors (PCDs) have emerged as an alternative to conventional energy-integrating detectors and may significantly improve the standard of care for computed tomography (CT). There are two main alternatives for the material of the detector: cadmium telluride (CdTe) and silicon (Si). LÄS MER
25. Stråldosreducering med hjälp av artificiell intelligens vid datortomografiundersökningar : En litteraturöversikt
Uppsats för yrkesexamina på grundnivå, Luleå tekniska universitet/Institutionen för hälsa, lärande och teknikSammanfattning : Introduktion: Datortomografi är en effektiv och snabb undersökningsmetod och skapar en detaljrik bild. Antal datortomografi undersökningar ökar varje år och relativt högstråldoser som kan bli skadligt är oroväckande. Det finns metoder som kan sänka och/eller förebygga joniserande strålning. LÄS MER