Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"gradient coil"”.
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Measurement of the spin diffusion rate of dipolar order in single crystal calcium fluoride
… measurement a special probe was developed with a gradient coil constant of 370±10.5[G/cmA]. A special holder was designed for holding the 1mm³ sample in addition to a gradient switcher for switching pulsed currents through the coil. The peak pulsed gradient strengths ranged from 28 to 85 T/m and …
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Novel geometry gradient coils for MRI designed by genetic algorithm
This thesis concerns the design of gradient coils for magnetic resonance imaging systems. The method of design by genetic algorithm optimisation is applied to novel gradient geometries both by use of conventional computer facilities, and, by parallelisation of the design algorithm, on a …
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Noise reduction during diffusion tensor imaging of infants
… originates from mechanical vibrations in the gradient coil assemblies due to interactions between the rapidly changing currents applied to the coils and the main static field. A transfer function relating the output acoustic noise spectrum to the gradient excitation input spectrum was …
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Entwicklung und Charakterisierung von mikrostrukturierten Planarspulen für Kernspinresonanz-Anwendungen
… low field devices, commonly based on solenoid coils of conventional copper wire, have already been developed to analyse centimetre-sized objects. However, the demand for a portable device, which enables a millimetre-sized structure analysis, was not fulfilled, especially to image small …