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 5 of 5 for “"surface coils"”.
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Analysis of surface coils using Green Functions for functional magnetic resonance imaging
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Off-resonance and detuned surface coils for B₁ inhomogeneity in 7-Tesla MRI
… head. Here we attempt to correct this by adding surface coils. To adjust the mutual coupling, we vary the resonance properties of the added coil. A new agar-based head phantom was built, and two surface coils were built and tuned. The surface coils were placed in various configurations against …
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Advanced clinical MRI for better outcome in epilepsy surgery. Focusing on fMRI and prediction of verbal memory decline.
… to high resolution 3T MRI with and without surface coils. The surface coils were placed over the suspected epileptogenic zone. The efficacy of the coils was assessed and graded in relation to their placement. In papers II, III and IV, a functional MRI (fMRI) paradigm, including both a verbal …
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Simulation of Electromagnetic Effects in Magnetic Resonance Imaging
… time, is employed to analyze the open RF coils in an MRI system. The FD-TD method, known for its ability to handle large and complex geometries, is applied to shielded birdcage coil analysis. Besides studying the field information inside the human head, the RF coil's resonant frequency …
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Radiofrequency losses in an NMR surface coil
… loss has been investigated for a resonant NMR surface coil between 20 MHz and 400 MHz. High-field NMR (> 64 MHz) is used increasingly for human imaging and spectroscopy to achieve improved SNR and spectral resolution. RF losses in coils designed using conventional lumped-element principles, …