Search for dissertations about: "Diffraction Tomography"

Showing result 1 - 5 of 21 swedish dissertations containing the words Diffraction Tomography.

  1. 1. Experimental verification of tomographic measurement methods in ultrasound

    University dissertation from Department of Electrical Measurements, Lund University

    Author : Monica Almqvist; [1999]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; airborne.; high resolution; characterization; tomography; light diffraction; doppler; ultrasound; vector tomography; Instrumentation technology; Mät- och instrumenteringsteknik;

    Abstract : This thesis describes two different measurement methods applied to ultrasound. The first method, Ultrasound doppler vector tomography, uses ultrasound to measure blood flow and the second method, Light diffraction tomography, measures the pressure field in an ultrasound beam with laser light. READ MORE

  2. 2. Inverse Problems in Tomography and Fast Methods for Singular Convolutions

    University dissertation from Centre for Mathematical Sciences, Lund University

    Author : Fredrik Andersson; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik; Unequally spaced FFT; Integral transforms; Singular integrals; Lippmann?Schwinger equation; Helmholtz equation; Inverse problems; Fast Gauss transform; Fast summation; Convolution; Radon transform; Tomography;

    Abstract : There are two, partially interlaced, themes treated in this thesis; inverse problems of tomographic type and fast and accurate methods for the application of convolution operators. Regarding the first theme, the inverse problem of Doppler tomography is considered and the Doppler moment transform is introduced for that purpose. READ MORE

  3. 3. CONTRIBUTION TO QUANTITATIVE MICROWAVE IMAGING TECHNIQUES FOR BIOMEDICAL APPLICATIONS

    University dissertation from Centre for Mathematical Sciences, Lund University

    Author : Tommy Henriksson; Ylva Bäcklund; Magnus Otterskog; Hans Sköld; Jean-Charles Bolomey; Nadine Joachimowicz; Alain Joisel; Paul M. Meaney; Christian Pichot; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quantitative Microwave Imaging. Inverse Problems; Nonliear Inverse Scattering; Diffraction Tomography; Breast Tumor Detection; Biomedical Imaging; Mammography; Calibration; Modeling; Planar 2.45 GHz Microwave Camera; Robot-based flexible multi-frequency data acquisition; TECHNOLOGY Electrical engineering; electronics and photonics Electrophysics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektrofysik; Elektronik; Electronics;

    Abstract : This dissertation presents a contribution to quantitative microwave imaging for breast tumor detection. The study made in the frame of a joint supervision Ph.D. thesis between University Paris-SUD 11 (France) and Mälardalen University (Sweden), has been conducted through two experimental microwave imaging setups, the existing 2. READ MORE

  4. 4. 3D Electron Microscopy Methods and Applications Structures from Atomic Scale to Mesoscale

    University dissertation from Stockholm : Department of Materials and Environmental Chemistry (MMK), Stockholm University

    Author : Taimin Yang; Xiaodong Zou; Grüne Tim; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; 3D Electron microscopy; continuous rotation electron diffraction; structure determination; data quality; electron tomography; mesoporous materials; zeolites; oorganisk kemi; Inorganic Chemistry;

    Abstract : The crystal structure determines the physical properties of a material. The structure can be analysed at different levels, from atomic level, mesoscale level, all the way up to the macroscale level. READ MORE

  5. 5. Cryo-electron tomography of individual protein molecules

    University dissertation from Stockholm : Karolinska Institutet, Department of Cell and Molecular Biology

    Author : Sara Sandin; Karolinska Institutet.; Karolinska Institutet.; [2005]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cryo-Electron Microscopy; Cryo-Electron Tomography; Protein Conformation; Antibodies; Immunoglobulin G; Glucocorticoid Receptor; Hepatocyte Growth Factor Scatter Factor; Receptor Tyrosine Kinase MET;

    Abstract : Averaging methods of determining structure, such as X-ray diffraction, do not preserve information about the flexibility of molecules. Cryo-electron tomography allows us to reconstruct individual hydrated objects. READ MORE