Search for dissertations about: "back projection"

Showing result 6 - 10 of 31 swedish dissertations containing the words back projection.

  2. 6. Computer Modelling of Neuronal Interactions in the Striatum

    Author : Johannes Hjorth; Jeanette Hellgren Kotaleski; Kevin Gurney; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; striatum; fast spiking interneurons; medium spiny projection neurons; gap junctions; interoperability; MUSIC; Computer science; Datavetenskap;

    Abstract : Large parts of the cortex and the thalamus project into the striatum,which serves as the input stage of the basal ganglia. Information isintegrated in the striatal neural network and then passed on, via themedium spiny (MS) projection neurons, to the output stages of thebasal ganglia. READ MORE

  4. 7. Brain Stem Involvement in Immune and Aversive Challenge

    Author : Jakob Paues; Anders Blomqvist; Finn Hallböök; Linköpings universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; lipopolysaccharide; Lithium Chloride; anorexia; aversion; parabrachial; brain stem; melanocortin; CGRP; enkephalin; Neurobiology; Neurobiologi;

    Abstract : Activation of the immune system by e.g. bacteria induces the acute-phase-response and sickness behaviour. The latter encompasses among other things fever, lethargy, anorexia and hyperalgesia. READ MORE

  5. 8. Development of a Mobile Tomographic Gamma Camera Based on Ectomography - Cardiotom

    Author : Mikael Persson; KTH; []
    Keywords : acute studies; myocardial infarction; scintigraphy; mobile gamma camera; tomography;

    Abstract : Successful treatment of myocardial infarction requires anearly and accurate diagnosis. Recent studies have shown thatacute myocardial scintigraphy has a high predictive value forprognosis of myocardial events. Three dimensional (3D)perfusion data obtained with SPECT are however very rare in theemergency department (ED). READ MORE

  6. 9. Location and Relocation of Seismic Sources

    Author : Ka Lok Li; Ólafur Gudmundsson; Roland Roberts; Ari Tryggvason; Lars Ottemöller; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earthquake location; Earthquake relocation; Tremor location; Bayesian inversion; Correlation; Earthquake catalog; Iceland; Seismicity; Interferometry; Inverse theory; Volcanic tremor; Geofysik med inriktning mot seismologi; Geophysics with specialization in Seismology;

    Abstract : This dissertation is a comprehensive summary of four papers on the development and application of new strategies for locating tremor and relocating events in earthquake catalogs.In the first paper, two new strategies for relocating events in a catalog are introduced. READ MORE

  7. 10. Inverse Problems in Tomography and Fast Methods for Singular Convolutions

    Author : Fredrik Andersson; Matematik LTH; []
    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