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 262 for “"Optical Imaging"”.
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Optical imaging of Rydberg atoms
… (EIT) in Rydberg atoms in order to observe optical nonlinearities at the single photon level. ⁸⁷Rb atoms are trapped and cooled using a magneto-optical trap (MOT) and a far off resonance dipole trap (FORT). Once the system is prepared, a ladder EIT scheme with Rydberg atoms is used to map …
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Smart optical imaging systems with automated electronics
… are several novel smart electronically automated optical designs to efficiently solve existing real-world problems in the field of shape sensing and imaging. First half of the thesis proposes shape sensing techniques that use an Electronically Controlled Variable Focus Lens (ECVFL) within a smart …
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Label-free optical imaging of neural activity
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Optical parametric amplification of optical imaging signals
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Optical Imaging Of Tissue Physiology With Exogenous Contrast Agents
… push the frontier per what one can learn from optically emitting exogenous contrast agents in living tissue. The first set of experiments concurrently measured cerebral blood flow and bothintravascular- and extravascular-tissue oxygen concentration in a rat brain during functional activation; …
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Multimodal Optical Imaging for Tissue Characterization and Disease Diagnosis
… ovarian cancers, many screening tests including imaging, physical examination, and blood markers tests have been investigated; however, at this time no routine screening is recommended in average-risk patients. This study evaluates the feasibility and design of instruments to use multimodal …
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Super-resolved volumetric optical imaging of virus-infected cells
… excellent tool to achieve super-resolution when imaging virus-infected samples using optical microscopy. Expansion microscopy is a recently conceived sample preparation technique that physically expands fixed specimens after embedding them in water-absorbing polymers. By expanding virus-infected …
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The characterization of particle clouds using optical imaging techniques
Optical imaging techniques can be used to provide a better understanding of the physical properties of particle clouds. The purpose of this thesis is to design, perform and evaluate a set of experiments using optical imaging techniques to characterize parameters such as shape factor and entrainment …
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The Examination of Aging and Attention Control With Optical Imaging
… eye movement, behavioral, and event-related optical signal (EROS) data during blocked versions of the pro- and antisaccade tasks for younger and older adults. The results of this study show that younger adults have more attentional control than older adults, evidenced by fewer errors and …
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Phase-sensitive light : coherence theory and applications to optical imaging
… biphotons. SPDC has been utilized in a number of optical imaging applications, such as optical coherence tomography, ghost imaging, holography and lithography, to obtain performance that cannot be realized with standard optical sources. However, a debate continues as to whether the improved …
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Development of a coherent optical imaging system for clinical dermatology
… port wine stain. Consequently, the demand for an imaging modality that can provide non-invasive visualization of capillary level blood flow is high. The major challenge in such imaging is to achieve high resolution and great flow sensitivity over a sufficient depth. Numerous imaging techniques …
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Learning Clinical Body Composition Metrics from 2D and 3D Optical Imaging
… osteoporosis. Estimates of body composition from optically measured human body geometry are cheap, safe, and non-invasive relative to current reference methods that require exposure to ionizing radiation.In this thesis, I present a body of work that thoroughly investigates predicting body …
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Multispectral optical imaging for the detection and delineation of oral neoplasia
… morbidity and mortality. Multispectral widefield optical imaging has emerged as a promising technology to aid clinicians in screening and resection of oral neoplasia, but current approaches rely on subjective interpretation. This work focuses on the design, construction, and clinical testing of a …
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Femtosecond pulse shaping for enhanced optical imaging and control of cells
Optical techniques have garnered increasing interest in biomedical research. As the types of optical probes available continue to expand, the appeal of experiments utilizing multiple probes simultaneously grows rapidly. Unfortunately, the significant spectral overlap in probe responsiveness …
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Chemical Nanolithography and Single Molecule Optical Imaging With Metal -Coated Probes
… AFM tips in apertureless near-field scanning optical microscopy of single molecules is also briefly discussed.
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Magnetomotive dynamics of magnetic particles for optical imaging contrast and elastography
… as magnetomotion is exploited for enhancing optical imaging contrast and elastography using optical coherence tomography (OCT). A combination of simulations and experiments were performed to study the spatial and temporal characteristics of the magnetomotive (MM) response under dynamic …
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Multi-view microscopy and multi-beam manipulation for high-resolution optical imaging
… in this thesis tackles some of the challenges in optical conventional and confocal microscopy and opens the third dimension for biological experiments like 3D cell cultures. Two instruments were built that provide high and isotropic resolution. In the Multi Imaging AxisMicroscope (MIAM) four …
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A Multiplexed, Multi-scale Optical Imaging Platform to Quantify Tumor Metabolic Heterogeneity
… exhibiting high rates of aerobic glycolysis. Optical imaging is well poised to study metabolic heterogeneity due to its ability to image cellular level features, to multiplex multiple endpoints, and the ability to image longitudinally. Endogenous fluorescence contrast of coenzymes NADH and FAD …
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The performance of an active optical imaging radar in the turbulent atmosphere.
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Volumetric Optical Imaging of Tissue Microstructure for Grading of Dysplasia In Vivo
Optical imaging offers unique advantages in medical diagnostics. In particular, high resolution, fast imaging speed, and strong depth penetration make optical coherence tomography (OCT) an attractive modality for non-perturbatively investigating structural changes in tissue that accompany disease …
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