Essays about: "iterative back-projection"

Found 4 essays containing the words iterative back-projection.

  1. 1. Tomographic reconstruction of subchannel void measurements of nuclear fuel geometries

    University essay from Uppsala universitet/Tillämpad kärnfysik

    Author : Magnus Ahnesjö; [2015]
    Keywords : tomography; void; nucler power; bwr;

    Abstract : The Westinghouse FRIGG loop in Västerås, Sweden, has been used to study the distribution of steam in the coolant flow of nuclear fuel elements, which is known as the void distribution. For this purpose, electrically heated mock-ups of a quarter BWR fuel bundles in the SVEA-96 geometry were studied by means of gamma tomography in the late 1990s. READ MORE

  2. 2. Characterization and Reduction of Noise in PET Data Using MVW-PCA

    University essay from Uppsala universitet/Institutionen för informationsteknologi

    Author : Per-Edvin Svensson; [2009]
    Keywords : ;

    Abstract : Masked Volume-Wise Principal Component Analysis (MVW-PCA) is used in Positron Emission Tomography (PET) to distinguish structures with different kinetic behaviours of an administered tracer. In the article where MVW-PCA was introduced, a noise pre-normalization was suggested due to temporal and spatial variations of the noise between slices. READ MORE

  3. 3. Evaluation of the reconstruction algorithm, Ordered Subsets Expectation Maximization, in whole body Positron Emission Tomography

    University essay from Linköpings universitet/Institutionen för medicinsk teknik

    Author : Markus Svensson; [2008]
    Keywords : PET; OSEM; image recontruction; medical imaging;

    Abstract : A Positive Electron Tomography/Computed Tomography devise was installed in theX-ray section at US Linköping in May 2007. Positive Electron Tomography examinations with 18F-fluoro-deoxy-glucose are mainly used for tumor examinations. During 2007 occurred approximately 200 examinations and in 2008 600 are planned. READ MORE

  4. 4. Optimization of iterative reconstruction methods for improving the contrast-to-noise ratio in PET exams

    University essay from Linköpings universitet/Institutionen för medicinsk teknik

    Author : Markus Svensson; [2008]
    Keywords : PET; OSEM; image recontruction; NEMA; medical imaging;

    Abstract : A Positive Electron Tomography/Computed Tomography devise was installed in the X-ray section at US Linköping in May 2007. Positive Electron Tomography examinations with 18F-fluoro-deoxyglucose are mainly used for tumor examinations. During 2007 occurred approximately 200 examinations and in 2008 600 are planned. READ MORE