Essays about: "DQE"
Found 4 essays containing the word DQE.
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1. Detective Quantum Efficiency in the Image Domain
University essay from KTH/FysikAbstract : 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. READ MORE
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2. Evaluation of the Impact of X-ray Tube Voltage and Filter Thickness on the Performance of Spectral Photon-Counting Detectors
University essay from KTH/Medicinteknik och hälsosystemAbstract : 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). READ MORE
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3. Methods for characterization of digital, image-producing detectors within medical X-ray diagnostics
University essay from Blekinge Tekniska Högskola/Avdelningen för signalbehandlingAbstract : 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. READ MORE
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4. Methods for characterization of digital, imageproducing detectors within medical X-ray diagnostics
University essay from Blekinge Tekniska Högskola/Avdelningen för signalbehandlingAbstract : 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. READ MORE