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 9 of 9 for “"Phase-encoding"”.
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Interferometric-spatial-phase imaging for sub-nanometer three-dimensional positioning
… The method is called Interferometric-Spatial-Phase Imaging (ISPI), and is based on encoding three-dimensional position information in the spatial phase and frequency of interference fringes, viewed with specialized oblique-incidence, dark-field optical microscopes. Alignment detectivity is …
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Magnetic resonance imaging modeling and applications to fast imaging and guidance of ultrasound surgery.
… simulate virtually any MRI pulse sequence. The phase encoding gradient pulses are also included which has proved to be very useful in predicting image artifacts and contrast behavior. The second is the application of MRI in guiding ultrasound surgery. A detailed study was performed on the …
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In-Vivo Three Dimensional Proton Hadamard Spectroscopic Imaging in the Human Brain
… shift imaging (CSI) which uses gradients for phase encoding. Although simple to implement, low in specific absorption rate (SAR) and immune to chemical shift displacement (CSD), it also suffers from some well known drawbacks caused by its sinc-shaped point spread function (PSF). This results …
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Developmental Alterations to the Alpha-Beta Neural Oscillations Underlying Verbal Working Memory Function in Children and Adolescents
… frequency range (~8-18 Hz), that supports WM encoding and maintenance processes in children and adolescents. This study also aimed to understand how the development of WM-related oscillatory dynamics is related to cognition in a broader context. Magnetoencephalography (MEG) was utilized to …
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Precision magnetometry and imaging via quantum manipulation of spins in diamond
… for the first time multiple-NV control using phase encoding. Pulsed magnetic field gradients encode in the NV spin phase the information about the position of the NV centers as well as the external magnetic field in the Fourier-space. This scheme allows 100-fold improvement in spatial …
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A multi-protocol quantum key distribution transmitter
… where a pulse preparation laser adopts the phase of a phase preparation laser. Controlling the phase and intensity of the pulses in this way removes the side channel ordinarily present with direct modulation, in that the phase, intensity and frequency simultaneously change in response to an …
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Sequence Development and Expansion of Zero J-Modulation Echo-Planar Chemical Shift Imaging in Three Dimensions (3D ZJ-EPSI)
… consisted of a slab excitation, followed by two phase encoding gradients and an echo planar switching readout gradient. The Free induction decay (FID) acquisition occurred during the plateaus of the switching gradient. The lipid suppression was achieved via ten Regional Saturation Technique …
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Dichte-gewichtete Phasenkodierung zur effizienten k-Raumabtastung in der NMR-Bildgebung
… Antwortfunktion zu Signalkontamination. Bei der Phasenkodierung kann diese Kontamination durch eine auf unterschiedlichen Mittelungszahlen beruhende Wichtung der k-Raumabtastung unterdrückt werden. Bei vorgegebener Experimentdauer und räumlicher Auflösung verringert diese …
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Noise reduction during diffusion tensor imaging of infants
… an EPI readout using sinusoidal frequency encoding waveforms and a constant phase encoding blip was also implemented. In addition to reducing produced noise, a passive noise reduction enclosure was built from open cell polyurethane foam mounted in a PVC frame to surround the sleeping infant …