Search for dissertations about: "image artifact"

Showing result 11 - 15 of 34 swedish dissertations containing the words image artifact.

  2. 11. Combining analytical and iterative reconstruction in helical cone-beam CT

    Author : Johan Sunnegårdh; Gösta Granlund; Per-Erik Danielsson; Michel Defrise; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cone-beam tomography; forward projection; image reconstruction; iterative reconstruction; ordered subsets; regularization; WFBP; Signal processing; Signalbehandling;

    Abstract : Contemporary algorithms employed for reconstruction of 3D volumes from helical cone beam projections are so called non-exact algorithms. This means that the reconstructed volumes contain artifacts irrespective of the detector resolution and number of projection angles employed in the process. READ MORE

  4. 12. Template-driven Documentation of Best Practices

    Author : Meshari Alwazae; Paul Johannesson; Janis Grabis; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Computer and Systems Sciences; data- och systemvetenskap;

    Abstract : Knowledge Management has become a key instrument for identifying, creating and sharing organizational knowledge assets. An attractive means for sharing knowledge is Best Practices (BPs), which are proven as well as efficient and effective solutions to recurring problems. READ MORE

  5. 13. Neurotransmitter Imaging of the Human Brain : Detecting γ-Aminobutyric Acid (GABA) Using Magnetic Resonance Spectroscopy

    Author : Sofie Tapper; Peter Lundberg; Anders Tisell; Peter Zsigmond; Richard Edden; Linköpings universitet; []
    Keywords : ;

    Abstract : Introduction: In this thesis, MEGA-edited Magnetic Resonance Spectroscopy (MRS) has been used for the purpose of non-invasive detection of !- aminobutyric acid (GABA) within the brain. GABA is the main inhibitory neurotransmitter in the human central nervous system, and glutamate is the corresponding main excitatory neurotransmitter. READ MORE

  6. 14. Careful Convivial Listening : Making Sound Work Apparent as Political Action

    Author : Hugo Boothby; Tina Askanius; Bo Reimer; Salomé Voegelin; Malmö universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Care; Conviviality; Experimental Media; Listening; Sound Work;

    Abstract : Focusing on the creation and performance of sound work this doctoral thesis considers the value of listening as a site of political action. The meaning of sound work is dual; connoting both an artifact that is created and performed, a work of art, and the processes of creating sound, the work of listening. READ MORE

  7. 15. Understanding the Designing of Knowledge Work Support Tools as a Situated Practice

    Author : Niclas Eberhagen; Anita Mirijamdotter; Ina Wagner; Linnéuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Conceptual model; participatory design approach; design science; explorative and iterative design; knowledge transitions; Information technology; Informationsteknik; Informatik; Information Systems;

    Abstract : The aim of the thesis is twofold. First, a need is exposed for adopting a situated design perspective in designing computer-based tools that support knowledge work. Second, an examination is made of what this perspective may reveal concerning the nature of processes and relations within the design situation. READ MORE