Search for dissertations about: "Michel Defrise"
Found 4 swedish dissertations containing the words Michel Defrise.
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1. Direct Fourier methods in 3D-reconstruction from cone-beam data
Abstract : The problem of 3D-reconstruction is encountered in both medical and industrial applications of X-ray tomography. It would seem natural to recover volume data by just repeating 2D-reconstructions slice-by-slice. READ MORE
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2. Combining analytical and iterative reconstruction in helical cone-beam CT
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
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3. Iterative Filtered Backprojection Methods for Helical Cone-Beam CT
Abstract : State-of-the-art reconstruction algorithms for medical helical cone-beam Computed Tomography (CT) are of type non-exact Filtered Backprojection (FBP). They are attractive because of their simplicity and low computational cost, but they produce sub-optimal images with respect to artifacts, resolution, and noise. READ MORE
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4. Cone-Beam Reconstruction Using Filtered Backprojection
Abstract : The art of medical computed tomography is constantly evolving and the last years have seen new ground breaking systems with multi-row detectors. These tomographs are able to increase both scanning speed and image quality compared to the single-row systems more commonly found in hospitals today. READ MORE