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Design and Realization of Phantom for MRI
Šablatura, Martin ; Čáp, Martin (referee) ; Nešpor, Dušan (advisor)
Paper studies the principles of MRI and composition of MR system. Main part of thesis focuses on design, mixing and measurement of solution for MR system phantom. Teoretical part of paper focuses on problematic of MRI and phantoms for MR system, including description of specific phantom, which is then realised. Paper contains methods for designing proposed kind of phantom and its followed measurement. Part of paper also focuses on mathematical models of elaboration of data aquired from measurements.
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Influence of correction factors on the parts of complex permittivity
Hangya, Josef ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
This work consider with monitoring components of complex permittivity at frequency section under the action of alternating electric field. Further factors, affecting the final accuracy of measured values. Object of this experiment is crystalline high-density polystyrene QUINN PS (thickness 2, 3 and 6 millimeters), at which according to the type of electrode system, follow the influence of air gap at the interface electrode - material. The experiment is finally finished with a test report according to standards IEC 250.
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Influence of nanoparticles on the properties of electroinsulating materials
Sedláček, Michal ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
This work deals with influence nanoparticles, as fillers of polymer, to electrical properties dielectric composite materials. Addition of just a few weight percent of nonofillers has profound impact on the physical, chemical, mechanical and electrical properties orf polymer. Simultaneously is focused on production and diagnostics by the relaxation spectroscopy and measure internal resistance. Examination material is epoxy resin TSA 220S filled Al2O3 and SiO2 nanoparticles.
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Effects of electrical stress on properties of electrical insulating materials
Hangya, Josef ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
Diploma thesis treat of effect of direct, alternate and pulse electrical stress on the properties surveyed electrical insulating material. Object of this experiment is crystalline high-density polystyrene QUINN PS. To monitor the stress is used the method of dielectric relaxation spectroscopy. Under examinations are the resultant dielectric spectra, which constitute the frequency dependencies of components of complex permitivity. Samples of the selected material are exposed to effects of alternate and pulse electrical stress on the different intensities of the electric field. In the direct field are then monitored absorption characteristics and specific volume resistance of the samples.
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Design and Realization of Phantom for MRI
Šablatura, Martin ; Čáp, Martin (referee) ; Nešpor, Dušan (advisor)
Paper studies the principles of MRI and composition of MR system. Main part of thesis focuses on design, mixing and measurement of solution for MR system phantom. Teoretical part of paper focuses on problematic of MRI and phantoms for MR system, including description of specific phantom, which is then realised. Paper contains methods for designing proposed kind of phantom and its followed measurement. Part of paper also focuses on mathematical models of elaboration of data aquired from measurements.
|
|
|
Influence of correction factors on the parts of complex permittivity
Hangya, Josef ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
This work consider with monitoring components of complex permittivity at frequency section under the action of alternating electric field. Further factors, affecting the final accuracy of measured values. Object of this experiment is crystalline high-density polystyrene QUINN PS (thickness 2, 3 and 6 millimeters), at which according to the type of electrode system, follow the influence of air gap at the interface electrode - material. The experiment is finally finished with a test report according to standards IEC 250.
|
|
|
Effects of electrical stress on properties of electrical insulating materials
Hangya, Josef ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
Diploma thesis treat of effect of direct, alternate and pulse electrical stress on the properties surveyed electrical insulating material. Object of this experiment is crystalline high-density polystyrene QUINN PS. To monitor the stress is used the method of dielectric relaxation spectroscopy. Under examinations are the resultant dielectric spectra, which constitute the frequency dependencies of components of complex permitivity. Samples of the selected material are exposed to effects of alternate and pulse electrical stress on the different intensities of the electric field. In the direct field are then monitored absorption characteristics and specific volume resistance of the samples.
|
|
|
Influence of nanoparticles on the properties of electroinsulating materials
Sedláček, Michal ; Rozsívalová, Zdenka (referee) ; Frk, Martin (advisor)
This work deals with influence nanoparticles, as fillers of polymer, to electrical properties dielectric composite materials. Addition of just a few weight percent of nonofillers has profound impact on the physical, chemical, mechanical and electrical properties orf polymer. Simultaneously is focused on production and diagnostics by the relaxation spectroscopy and measure internal resistance. Examination material is epoxy resin TSA 220S filled Al2O3 and SiO2 nanoparticles.
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