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.
Results
Showing 1 to 18 of 18 for “"3-D Imaging"”.
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Toward a compact underwater structured light 3-D imaging system
A compact underwater 3-D imaging system based on the principles of structured light was created for classroom demonstration and laboratory research purposes. The 3-D scanner design was based on research by the Hackengineer team at Rice University. The system is comprised of a low-power, open-source …
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Optical Scanning Holography for 3-D Imaging of Fluorescent Objects in Turbid Media
… heterodyne 2-D scanning technique for 3-D imaging of fluorescent objects in turbid media is described and experimentally demonstrated. For the first time, 3-D imaging of fluorescentobjects in turbid media by a holographic method is achieved, and the diffused photon rejecting process through …
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Characterization and Helicopter Flight Test of 3-D Imaging Flash LIDAR Technology for Safe, Autonomous, and Precise Planetary Landing
… The flash lidars incorporate pioneering 3-D imaging cameras based on Indium-Gallium-Arsenide Avalanche Photo Diode (InGaAs APD) and novel micro-electronic technology for a 128 x 128 pixel array operating at 30 Hz, high pulse-energy 1.06 ?m Nd:YAG lasers, and high performance transmitter and …
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Motion -Compensated 3-D Generalized Series Imaging
Three-dimensional magnetic resonance (MR) imaging is highly desirable from the standpoints of minimum voxel size, volumetric coverage and signal-to-noise efficiency. Unfortunately, long scan times have traditionally precluded the use of 3-D imaging in applications where simultaneous resolution of …
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Photon-limited time of flight depth acquisition : new parametric model and its analysis
As 3-D imaging systems become more popular, the depth estimation which is their core component should be made as accurate as possible at low power levels. In this thesis, we consider the time of flight depth acquisition problem at low photon counts. We first formulate the received light intensity …
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High throughput 3-D tissue cytometry
… microscopy (TPM) that is capable of in situ 3-D imaging of tissue up to a volume of several mm3 with subcellular resolution. This high throughput tissue cytometry achieves an imaging rate of 2 mm3/hour. I optimize the performance of this instrument by developing two new techniques. First, the …
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Characterization of single-sided cadmium zinc telluride strip detectors for high energy astrophysics applications
… The characterization includes spectroscopy, imaging, uniformity and efficiency measurements. Measured energy resolutions with both detector designs are better than those obtainable with NaI(Tl), the scintillator detector material most often used in this energy range. The 3-D imaging …
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Digital ear scanner : measuring the compliance of the ear
… improved. Current optical techniques for 3-D imaging are too expensive to be implemented in the ear canal for the purpose of custom fitted hearing aids. A new absorption based optical technique is introduced, which is capable of generating three dimensional maps of an ear subjected to a …
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Fluorinated Metal Complexes as MRI Contrast Agents
Magnetic resonance imaging (MRI) is a vital tool in today’s modern healthcare system. MRI is preferred over positron emission tomography (PET) and X-ray computed tomography (CT) because it is non-invasive, non-radioactive, and provides 3-D imaging directly in vivo. Contrast agents are used in order …
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Analysis of Colorectal Polyps in Optical Projection Tomography
Optical projection tomography enables 3-D imaging of colorectal polyps at resolutions of 5 – 10 μm. This thesis presents image analysis methods for the polyp diagnosis from such images. Specifically, we investigate 3-D texture-based recognition methods, as well as weakly supervised classification …
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Near-infrared emitting quantum dots for cellular and vascular fluorescent labeling in in vivo multiplexed imaging studies
… by developing cellular and vascular fluorescent imaging probes comprised of semiconductor nanocrystals, or quantum dots (QDs), with tunable fluorescence between 65o-8oonm and exhibiting photostability, robust quantum yield and narrow fluorescence profiles that are critical for such applications. …
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Twin-image problems in optical scanning holography
… recording methods. We first review a new 3-D imaging technique called optical scanning holography (OSH) by acousto-optic two-pupil synthesis. We then derive 3-D holographic magnification, using three points configured as a 3-D object. We demonstrate three-dimensional imaging capability of OSH …
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Efficient architectures of heterogeneous fpga-gpu for 3-d medical image compression
… advent of development in three-dimensional (3-D) imaging modalities have generated a massive amount of volumetric data in 3-D images such as magnetic resonance imaging (MRI), computed tomography (CT), positron emission tomography (PET), and ultrasound (US). Existing survey reveals the presence of …
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High-resolution 3-D refractive index imaging and Its biological applications
This thesis presents a theory of 3-D imaging in partially coherent light under a non-paraxial condition. The transmission cross-coefficient (TCC) has been used to characterize partially coherent imaging in a 2- D and 3-D paraxial model. It is shown that the 3-D TCC under the non-paraxial condition …
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Two-photon absorption in bulk semiconductors and quantum well structures and its applications
… enhanced detection is also applied to mid-IR imaging and light detection and ranging (LIDAR) in uncooled direct-gap photodiodes. A theoretical study of degenerate 2PA (D-2PA) in quantum wells, QWs, is presented, along with a new theory of ND 2PA in QWs is developed. Pulsed mid-IR detection of …
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Synthesis and characterization of new light emitting probes for sensitive detection of bio-molecules and live cells
… posaconazole and caspofungin, for diagnostic imaging of fungal cells. Invasive fungal infections (IFI's) are a growing threat to human health particularly, with increase in the number of immune-compromised patient population, such as organ transplant recipients, al logeneic B MT, hematologic …
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Epithelial and immune cell dynamics in non-traditional models of mammary postnatal development
… were then investigated. Deep tissue 3-D imaging demonstrated that ovine mammary myoepithelial cells undergo morphological changes during development and the microenvironment comprises a spatially and morphologically heterogenous macrophage population, which is closely associated with the …