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 12 of 12 for “"tomograph"”.
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Development of an electrical impedance tomograph for complex impedance imaging
… concerns the development of electrical impedance tomography towards the production of complex impedance images. The prime intention was to investigate the feasibility of developing suitable instrumentation; but not clinical applications. It was aimed to develop techniques for the performance …
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Accelerated image reconstruction for a cylindrical positron tomograph using Fourier domain methods
Thesis (Ph. D.)--Harvard University--Massachusetts Institute of Technology Division of Health Sciences and Technology, Program in Medical Engineering and Medical Physics, 1990.
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Assembly and proving of a wave front sensing confocal Scanning Laser Ophthalmoscope
… into a slightly modified Heidelberg Retina Tomograph (HRT) and aberrations of model eyes were measured. Results show that this system is now ready for testing on living eyes.
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Entwicklung und Anwendung mobiler NMR-Sonden
… In contrary to an experiment done on a clinical tomograph the NMR-MOUSE allows to vary the angle between the orientation of the sample and the static magnetic field. This makes it possible to measure the T2 anisotropy of e.g. tendon. Measurements of the anisotropic behaviour of 1/T2 had been done …
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Parallel algorithms for three dimensional electrical impedance tomography
… thesis is concerned with Electrical Impedance Tomography (EIT), an imaging technique in which pictures of the electrical impedance within a volume are formed from current and voltage measurements made on the surface of the volume. The focus of the thesis is the mathematical and numerical …
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Die Wertigkeit der 1H- und 31P- Spektroskopie bei Rotatorenmanschettenrupturen
… einer MR-Untersuchung (1,5 T MR Tomograph, Siemens Vision Pro, Siemens AG Erlangen) unterzogen. Die hohe Validität dieser Messmethode ist durch die hochsignifikante Korrelation mit den Phantomuntersuchungen belegt worden. Als weiteres konnte gezeigt werden, dass die fettige …
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MR-Protonen-Spektroskopie des Linsenkerns bei idiopathischen Handdystonien
… eine Standard-Kopfspule ( 1,5 T Ganzkörper MR-Tomograph, Siemens Magnetom Vision, Erlangen) verwendet. Die Spektrenerhebung erfolgte mit Hilfe einer PRESS-Sequenz (TR= 1365 ms, TE= 135 ms), das Voxel war auf das Gebiet des Linsenkerns zentriert. Die anhand der Spektren ermittelten …
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Aspects of faulting and fracturing in brittle lithologies
… system is analyzed in 4D with a computer tomograph to obtain visual information on the geometry of the evolving fracture network and to allow statistical analyses on the population of the open-mode volumes over time. It is shown that in a system with natural material heterogeneity the …
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Sistemas tomográficos multimodalidad para animales de laboratorio
… possibilities for integrating them with X-ray tomographic systems. Specifically, this work focuses on the problem of optimizing the performance of scanners based on partial rings of detectors, because this approach is a more inexpensive solution than complete rings based systems, and also …
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Influence of process parameters and manufacturing defects on the properties of thermoplastic composite pipes.
… electron microscopy (SEM), X-ray computed tomograph (XCT), density method and ultra sound) was used in this study to quantifying the defects present in the TCP. The testing and characterization of existing TCP was conducted to benchmark their behaviour, composition, and properties through a …
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Optimalizace metody měření magnetické susceptibility
Cílem této práce je proměřit vzorky umístěných do pole MR tomografu, naměřená data zpracovat a vyhodnotit chyby měření. Teoretická část je zaměřena na popis základních veličin magnetického pole, uvedení některých starších metod měření a návrhu metody měření pro vzorky nevydávající MR signál. Je zde …