Search for dissertations about: "attenuation"
Showing result 6 - 10 of 406 swedish dissertations containing the word attenuation.
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6. Assessment of attenuation correction methods for quantitative neuro-PET/MR
Abstract : Hybrid PET/magnetic resonance (MR) can provide physiological, functional, and structural information simultaneously, facilitating research in neurological disorders. For quantitative PET, correction for photon attenuation (AC) is necessary. READ MORE
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7. Novel computational methods for image analysis and quantification using position sensitive radiation detectors
Abstract : The major advantage of position sensitive radiation detector systems lies in their ability to non invasively map the regional distribution of the emitted radiation in real-time. Three of such detector systems were studied in this thesis, gamma-cameras, positron cameras and CMOS image sensors. READ MORE
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8. Longer Wavelength GaAs-Based VCSELs for Extended-Reach Optical Interconnects
Abstract : Data centers of today are increasing in size and are built to accommodate strong traffic demands while providing sustainably by having clients sharing resources under one roof. Their massive scale puts pressure on the server network topology and has incited a need for data transmission links that are energy efficient and capable of operation at high bit rates with reach up to a few kilometers. READ MORE
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9. Basin-scale change in water availability and water quality under intensified irrigated agriculture
Abstract : Changes in land use and water use can greatly impact the cycling of water and water-borne substances. Increased redistribution of river water to irrigated fields can cause enhanced evapotranspiration and decreased river discharge. READ MORE
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10. Scattering of elastic waves by an anisotropic sphere
Abstract : Scattering of a plane wave by a single spherical obstacle is the archetype of many scattering problems in physics and geophysics. Spherical objects can provide a good approximation for many real objects, and the analytic formulation for a single sphere can be used to investigate wave propagation in more complicated structures like particle composites or grainy materials, which may have application in non-destructive testing, material characterization, medical ultrasound, etc. READ MORE