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 20 of 41 for “"Conventional imaging"”.
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Comparison of 18F-Fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (18F-FDG PET/CT) and conventional imaging (CI) for locally advanced breast cancer staging: a prospective study from a tertiary hospital cancer centre in Western Cape
… accuracy between whole-body PET/PET-CT and conventional imagine (CI) for staging LABC. Methods: A total of 42 participants with clinical stage III and a select few stage II breast cancer underwent both 18F-FDG PET/CT and CI. Results: 18F-FDG PET/CT found significantly more (p=0.0077) distant …
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Computational imaging with scattered photons to see inside the body
Conventional imaging for health applications captures photons from the objects that are directly in the field of view of the camera. In this thesis, we develop computational frameworks to exploit scattered photons to image regions that are not directly visible to the camera. First, we will explore …
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Acoustic classification of buried objects with mobile sonar platforms
… including synthetic aperture sonar and conventional imaging, are explored within the context of the buried object problem. In particular, the need to employ low frequencies for seabed penetration is shown to have a significant impact both due to the relative length of the characteristic …
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Imaging and controlling atoms and semiconductor spins with advanced optical microscopy
… detection with high spatial resolution. However, conventional capabilities of optical microscopes often limit advances of quantum science and technologies that are based on atoms and atom-like semiconductor spins. In this thesis, I present new approaches to extend such optical microscopes' …
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A simplified HDR image processing pipeline for digital photography
High Dynamic Range (HDR) imaging has revolutionized the digital imaging. It allows capture, storage, manipulation, and display of full dynamic range of the captured scene. As a result, it has spawned whole new possibilities for digital photography, from photorealistic to hyper-real. With all these …
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Colloidal semiconductor nanocrystals as nanoscale emissive probes in light emitting diodes and cell biology
… as well as to unveil properties of cells that conventional imaging techniques cannot reveal. On the LED side, in particular, Chapter 2 utilizes individual NCs to alter layered organic LED structures at nanometer scale, resulting in spectrally resolved electroluminescence from single colloidal …
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Synthetic aperture microscopy
… an image of the target. Low resolution conventional imaging maps an array of "targets" (actually portions of a larger target) to a CCD array, thus allowing this sensing process to be done in parallel over a large region. The end result is to boost the resolution of a conventional imager …
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CLINICAL APPLICATION AND PROGNOSTIC VALUE OF COMPUTED TOMOGRAPHY EXAMINATION IN FOALS DIAGNOSED WITH HEMATOGENOUS OSTEOMYELITIS
… osteomyelitis, to compare findings obtained by conventional imaging methods and CT, and to investigate correlations between clinical and imaging findings and survival. Inclusion criteria were; 1. Foals under 9 months of age, 2. Presumptive clinical diagnosis of osteomyelitis, 3. CT examination …
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Low-dimensional carbon allotropes: an electron microscopy investigation
… electron microscopy (TEM) techniques, from conventional imaging and diffraction, to advanced interferometric methods, like electron holography and Geometric Phase Analysis (GPA), using a low-voltage optical set-up, to reduce radiation damage in the samples. Electron holography was used to …
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An estimation-theoretic technique for motion-compensated synthetic-aperture array imaging
Synthetic-Aperture Radar (SAR) is an imaging technique that achieves high azimuth resolution by using coherent processing to exploit the relative motion between an airborne or spaceborne radar antenna and the imaged target field (effectively synthesizing the effect of a larger aperture array). From …
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Structural characterization of primary cilia using accelerated piezoelectrically driven STED nanoscopy
… relevant morphometric features using conventional imaging techniques. The molecular architecture of the primary cilium is beyond the resolvability of conventional diffraction limited optical imaging techniques. Data from non-optical tools such as electron microscopy have been limited …
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Nanoscale investigation of silk proteins using near-field optics
… the improvement of material properties. However, conventional imaging techniques that are used to characterize and recapitulate silk structure–function relationships present challenges at the nanoscale given their limitations in chemical sensitivity (for example, electron microscopy and atomic …
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Measurement of The Vascular Input Function In Mice For Dce-Mri
… limited temporal resolution achievable with MR imaging. In this work, the development of a suite of techniques for high temporal resolution, artifact resistant measurement of the VIF in mice is described. One obstacle in VIF measurement is inflow enhancement, which decreases the sensitivity of …
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Speckle applications for volumetric imaging of biological dynamics
… randomness is often treated as noise in optical imaging. In another perspective, the speckle statistics can be exploited to extract information that is not readily accessible through conventional imaging techniques. This thesis describes the application of speckle in assisting imaging structure …
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Human performance evaluations of selected image enhancement/restoration techniques
Recently, the number of digital imaging systems incorporated into information display applications, such as military and industrial aerial reconnaissance, has increased rapidly. These imaging systems provide considerable flexibility for the processing and enhancement of information that otherwise …
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Investigation of plenoptic imaging systems: a wave optics approach
Conventional imaging devices only capture a part of the total information carried by the light. A new generation of imaging devices, plenoptic systems, use an array of micro lenses to codify the light coming from an object into a four dimensional function called the light field. The final image is …
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Cavity Plasmonics - Exploring narrow-gap plasmonic coupled systems to boost, localize and exploit nanometric light -matter interaction
… asymmetry which is otherwise inaccessible for conventional imaging techniques. Furthermore, laser irradiation is employed to induce atomistic re-sculpturing processes of the cavity morphology, actively tuning the plasmonic modes. Two regimes of growth are identified: facet growth using hard …
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Seeing Beyond Limits with Physics-Informed Priors
Conventional imaging systems are limited by dimensionality and visibility: standard sensors capture only two-dimensional data, while light diffuses or scatters across surfaces and through complex media. This dissertation reformulates imaging as an interplay of optical encoding and neural decoding. …
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Quantitative Texture Analysis and Automated Segmentation of Patellar Tendon Sonographic Images on Collegiate Athletes
… methods, including clinical evaluation and conventional imaging techniques, have limitations that have led to the development of ultrasound texture analysis as a valuable tool for a more detailed assessment of these tissues. These limitations can also be addressed through machine learning …
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