Essays about: "Ring artifact"

Found 3 essays containing the words Ring artifact.

  1. 1. Deep Ring Artifact Reduction in Photon-Counting CT

    University essay from KTH/Fysik

    Author : Konstantinos Liappis; [2022]
    Keywords : Photon¬counting; Spectral CT; Material Decomposition; Deep learning; Resnet; Ring artifact; Sinogram; Fotonräknande; Spektral datortomografi; Materialdekomposition; Djupinlärning; Resnet; Ringartefakt; Sinogram;

    Abstract : Ring artifacts are a common problem with the use of photon-counting detectors and commercial deployment rests on being able to compensate for them. Deep learning has been proposed as a candidate for tackling the inefficiency or high cost of traditional techniques. READ MORE

  3. 2. Material decomposition using a photon counting X-ray detector in low energy range

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Rasmus Solem; [2021]
    Keywords : Medicine and Health Sciences;

    Abstract : 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. READ MORE

  4. 3. Securing Safebook : Secure Data Access Control and Key Management for Safebook

    University essay from KTH/Radio Systems Laboratory (RS Lab)

    Author : Waqas Liaqat Ali; [2013]
    Keywords : User Privacy; Access Control; Distributed Social Networks; Key Management; Användarnas Privatliv; Atkomstkontroll; Distribuerade Sociala Nätverk; Nyckelhantering;

    Abstract : Online social networks have become a fast and efficient way of sharing information and experiences. Over the past few years the trend of using social networks has drastically increased with an enormous amount of users’ private contents injected into the providers’ data centers. READ MORE