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Het doel van deze eindverhandeling bestond erin om een phased array van oppervlaktespoelen voor MRI te bestuderen, simuleren en ontwikkelen. Simulatie door middel van de Finite Difference - Time Domain methode (FDTD) wordt besproken, en een methode om geconcentreerde elementen te combineren met een niet reflecterende simulatie grenszone (PML) werd opgesteld. De benodigdheden om zo'n array te bouwen worden besproken en de beperkingen geanalyseerd vanuit meerdere standpunten, zoals veiligheid en kostprijs. De oplossing voor enkele courante problemen zoals ontkoppeling tussen spoelen en mantelstromen wordt beschreven. Ook wordt theoretisch een opstelling besproken voor beeldvorming met Xenon-129, samen met enkele technieken om de prestaties te meten zonder een MRI scanner beschikbaar te hebben. The goal of this thesis was the analysis, simulation and development of a phased array of surface coils for MRI. Simulation using the Finite Difference - Time Domain method is analysed, and a method to combine a perfectly matched layer (PML) with lumped elements is introduced. The requirements for an array and the practical limitations are analysed from several perspectives, such as safety and cost. The solution to several common problems, like decoupling between coils and common-mode currents, are described. Finally a theoretical array for imaging using Xenon-129 was proposed together with techniques to test it without having an MRI scanner available.

Analoge elektronica - analog electronics. --- FDTD. --- Hyperpolarisatie. --- MRI. --- Magnetische resonantie. --- Oppervlaktespoel. --- Phased array.

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During the last decade, novel graphene related materials (GRMs), perovskites, as well as metal oxides and other metal nanostructures have received the interest of the scientific community. Due to their extraordinary physical, optical, thermal, and electrical properties, which are correlated with their 2D ultrathin atomic layer structure, large interlayer distance, ease of functionalization, and bandgap tunability, these nanomaterials have been applied in the development or the improvement of innovative optoelectronic applications, as well as the expansion of theoretical studies and simulations in the fast-growing fields of energy (photovoltaics, energy storage, fuel cells, hydrogen storage, catalysis, etc.), electronics, photonics, spintronics, and sensing devices. The continuous nanostructure-based applications development has provided the ability to significantly improve existing products and to explore the design of materials and devices with novel functionalities. This book demonstrates some of the most recent trends and advances in the interdisciplinary field of optoelectronics. Most articles focus on light emitting diodes (LEDs) and solar cells (SCs), including organic, inorganic, and hybrid configurations, whereas the rest address photodetectors, transistors, and other well-known dynamic optoelectronic devices. In this context, this exceptional collection of articles is directed at a broad scientific audience of chemists, materials scientists, physicists, and engineers, with the goals of highlighting the potential of innovative optoelectronic applications incorporating nanostructures and inspiring their realization.

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