Sökning: "DQE"
Hittade 5 uppsatser innehållade ordet DQE.
1. Detective Quantum Efficiency in the Image Domain
Master-uppsats, KTH/FysikSammanfattning : We investigate the signal and noise transform characteristics from the projection domain to the image domain in a linear systems theory framework and predictions of the DQE within this framework are made. A simulation study of a photon counting silicon detector is made from which the energy information is used in order to produce synthetic monoenergetic images. LÄS MER
2. Relationen mellan designkvalitet och designintention : En tillämpning av design quality evaluation (DQE) i påbyggnadsprojekt
Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Arkitektur och vattenSammanfattning : Påbyggnation är en typ av hållbar stadsutveckling som blir allt vanligare i Sverige. Ett av de gemensamma målen vid påbyggnation, likt andra byggprojekt, är att uppnå en viss förbestämd kvalitet. Designkvalitet kan ses som en del av kvalitetsmålet. LÄS MER
3. 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
4. Methods for characterization of digital, image-producing detectors within medical X-ray diagnostics
Kandidat-uppsats, Blekinge Tekniska Högskola/Avdelningen för signalbehandlingSammanfattning : Construct a test object (phantom) that can generate a sharp edge in the X- ray image. Develop a program code in the high-level language MATLAB for determination of earlier mentioned parameters, MTF and DQE in particular. Work out radiation geometry, suitable for the purpose. LÄS MER
5. Methods for characterization of digital, imageproducing detectors within medical X-ray diagnostics
Kandidat-uppsats, Blekinge Tekniska Högskola/Avdelningen för signalbehandlingSammanfattning : Since the end of the 1900th century ionized radiation, foremost X-ray radiation, have been used, with great success, within the medical field as a method for diagnostics as well as for therapeutically treatments. When it comes to X- ray diagnostics, the analogue film, detector and display medium have, in principle, been used the whole time. LÄS MER