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 20 of 7331 for “"microscopy"”.
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STED-4Pi Microscopy
… to break Abbe's resolution limit in fluorescence microscopy. This technique suppresses fluorescence at the focal rim by use of a depleting laser pulse. In this thesis, theoretical and experimental examinations show that the combination with another technique, namely 4Pi-confocal microscopy, leads …
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Differential multiphoton microscopy
2010 Spring.
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Magnetic resonance microscopy
… on the appearance of magnetic resonance microscopy images. A scaling law was used to predict the onset of motional narrowing effects for given values of diffusion, length, gradient strength, and gyromagnetic ratio. Barriers to translational diffusion were found to result in significant …
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Synthetic aperture microscopy
In the late 1800's, Ernst Abbe, research director of the Carl Zeiss Optical Works, wrote down the rules for a lens to form a sharp image. Advances in communications theory, signal processing, and computers have allowed us.finally to break those rules. Our "Synthetic Aperture Microscope" floods a …
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Expansion Microscopy of Extracellular Space for Light Microscopy-Based Connectomic Analysis
… an exploratory methodology, termed expansion microscopy of extracellular space (ExECS), designed to enhance the visualization of the extracellular space (ECS) within aldehyde-fixed tissue. This technique leverages the principles of expansion microscopy (ExM), a method that facilitates …
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Optical-Resolution Photoacoustic Microscopy
Optical microscopy, providing valuable biomedical insights at the cellular and organelle levels, has been widely recognized as an enabling technology. Mainstream optical microscopy technologies, including single-/multi-photon fluorescence microscopy and OCT, have demonstrated extraordinary …
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Multi-contrast Photoacoustic Microscopy
<p>Photoacoustic microscopy is a hybrid imaging modality with high spatial resolution, moderate imaging depth, excellent imaging contrast and functional imaging capability. Taking full advantage of this powerful weapon, we have investigated different anatomical, functional, flow dynamic and …
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Interferometric Synthetic Aperture Microscopy
… a new modality in three-dimensional (3D) optical microscopy, Interferometric Synthetic Aperture Microscopy (ISAM), is introduced to account for the scattering effects. Comprehensive models for interferometric microscopy, such as optical coherence tomography (OCT) are developed, for which forward, …
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Electrostatic force balance microscopy
… of nanoscale materials, we propose a novel microscopy scheme with the purpose of electrostatically imaging biased conductors buried in insulators below doped semiconductors. This Heterodyne-Electrostatic Force Balance Microscope (H-EFBM) uses a capacitive microcantilever to electrically …
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Coherence gated confocal microscopy
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Nuclear magnetic resonance microscopy
… variations in the magnetic susceptibility in NMR microscopy are described, which, along with the intrinsic low sensitivity of NMR, are the fundamental limitations to resolution. Molecular diffusion in the presence of a magnetization grating not only broadens the point spread function but also …
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Scanning standing-wave illumination microscopy : a path to nanometer resolution in X-ray microscopy
X-ray microscopy can potentially combine the advantages of light microscopy with resolution approaching that of electron microscopy. In theory, x-ray microscopes can image unsectioned hydrated cells with nanometer resolution. In practice, however, the resolution of x-ray microscopes is limited to …
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Nonlinear Microscopy for Material Characterization
… use of femtosecond laser sources, nonlinear microscopy provides access to previously unstudied aspects of materials. By probing third order nonlinear optical signals determined by the nonlinear susceptibility chi(3), which is present in all materials, we gain insight not available by …
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Nonlinear microscopy for material characterization
… use of femtosecond laser sources, nonlinear microscopy exhibits inherent 3- dimensional optical sectioning and provides access to previously unstudied aspects of materials. By probing third order nonlinear optical signals determined by the nonlinear susceptibility (chi-3), which is present in …
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Ptychography for Nonlinear Optical Microscopy
… I will introduce a novel nonlinear optical microscopy method to address some of the shortcomings in the current nonlinear optical microscopy literature and offer a supplement to traditional fluorescent microscopy for label free optical biomedical imaging. In order to demonstrate this method …
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Time Resolved Light Sheet Microscopy
… photon counting fluorescence lifetime imaging microscopy is just one of the tools used to carry out this line of research. Here we demonstrate a direct interaction between two proteins involved in gene regulation and expression; p21 and FMN2. Furthermore, we also show the capability of this …
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Mathematical Challenges in Electron Microscopy
… matter. Because of these capabilities, electron microscopy is used in applications as diverse as drug discovery, computer chip manufacture, and the development of solar cells. In parallel to this, the mathematical field of inverse problems has also evolved dramatically. Many new methods have been …
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Optically-Assisted Scanning Tunneling Microscopy
Scanning tunneling microscopy (STM) consistently provides the highest spatial resolution among the scanning probe methods, allowing surfaces to be investigated on the atomic level. With the addition of optical excitation, STM promises to become a powerful technique for single molecule spectroscopy, …
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