Search for dissertations about: "tomography"

Showing result 1 - 5 of 934 swedish dissertations containing the word tomography.

  1. 1. Studies of vector tomography

    Author : Kent Stråhlén; Matematik LTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Doppler tomography; Doppler Radon transform; local tomography; vectorial k-plane transform; vectorial Radon transform; k-plane transform; Radon transform; tomography; vector tomography; Mathematics; Matematik;

    Abstract : The motivation to study the kind of problems appearing in this thesis has been ultrasound measurements of flows, from which velocity spectra along lines can be determined. These velocity spectra can mathematically be described by a new non-linear transform, here called the Doppler Spectral Transform (DST). READ MORE

  2. 2. Microwave tomography

    Author : Andreas Fhager; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; inverse algorithms; microwave tomography; image reconstruction; FDTD; inverse Maxwell problem; mammography;

    Abstract : Microwave tomography for non-destructive detection of internaldielectric properties has received increasing interest during the lastdecades. Several application areas are under research, includingapplications in geoscience, biomedical applications, safety andsecurity etc. READ MORE

  3. 3. Seismic tomography : Algorithms and applications

    Author : Zhengsheng Yao; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Geophysics Specialized In Seismology; geofysik; med inriktning mot seismologi;

    Abstract : A preferred algorithm for seismic tomography needs to have capabilities including computational efficiency, minimal computer memory requirements, easy regularization and nonuniqueness analysis. In this thesis, regularised recursive least squares for seismic tomography is developed. READ MORE

  4. 4. Seismic tomography : Inversion for P- and S-wave velocities

    Author : Ari Tryggvason; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Geofysik med inriktning mot seismologi; Geophysics with specialization in Seismology;

    Abstract : Seismology is undoubtedly the most powerful method for determining the structure of the Earth below the deepest borehole. This thesis describes the, use of seismic signals from both man-made and earthquake sources to model seismic velocities within a volume of the Earth. READ MORE

  5. 5. Laboratory x-ray fluorescence tomography

    Author : Jakob C. Larsson; Hans Hertz; Anna Burvall; Ulrich Vogt; Norbert Pelc; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; x-ray; fluorescence; x-ray fluorescence; nanoparticle; xrf; xfct; tomography; Physics; Fysik;

    Abstract : X-ray fluorescence (XRF) tomography is an emerging bio-imaging modality with potential for high-resolution molecular imaging in 3D. In this technique the fluorescence signal from targeted nanoparticles (NPs) is measured, providing information about the spatial distribution and concentration of the NPs inside the object. READ MORE