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 42 for “"Tomography Imaging"”.
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Functional Spectral Domain Optical Coherence Tomography Imaging
<p>Spectral Domain Optical Coherence Tomography (SDOCT) is a high-speed, high resolution imaging modality capable of structural and functional resolution of tissue microstructure. SDOCT fills a niche between histology and ultrasound imaging, providing non-contact, non-invasive backscattering …
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Endovascular Optical Coherence Tomography Imaging in Cerebrovascular Disease
… development. Endovascular optical coherence tomography (OCT) is the highest resolution intravascular imaging modality available, utilizing near-infrared light with a wavelength of approximately 1300 nm and excellent spatial resolution of 10µm is achievable. With near histologic resolution, …
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Advanced functional and intraoperative ophthalmic optical coherence tomography imaging
Optical coherence tomography (OCT) is a non-contact, non-invasive imaging technique that uses optical interferometry to generate high-resolution, depth-resolved images of tissue in vivo. Ophthalmologists now use commercial OCT systems as a standard diagnostic instrument for imaging the retina to …
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Three-Dimensional Photoacoustic Computed Tomography: Imaging Models and Reconstruction Algorithms
<p>Photoacoustic computed tomography: PACT), also known as optoacoustic tomography, is a rapidly emerging imaging modality that holds great promise for a wide range of biomedical imaging applications. Much effort has been devoted to the investigation of imaging physics and the optimization of …
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Approaches for respiratory motion compensation in positron emission tomography imaging
… quantitation results in positron emission tomography (PET) imaging. Traditional gated acquisition approach corrects motion artifacts by generating a snapshot sequence. Each snapshot, however, is of poor image quality due to insufficient photon counts. This dissertation addresses the problem …
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Development of Multi-modal Optical Coherence Tomography Imaging Systems and Probes
Optical Coherence Tomography (OCT) is a powerful imaging modality widely used in medical diagnostics and biological research for its non-invasive, high-resolution, and depth-resolved properties. Additionally, OCT has demonstrated remarkable versatility in various applications. In this thesis, we …
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Applications of Fourier Domain Mode Locked lasers for optical coherence tomography imaging
Optical coherence tomography (OCT) is a micrometer-resolution imaging technique that produces cross-sectional images of sample microstructure by measuring the amplitude and echo time delay of backscattered light. OCT imaging is performed using low-coherence interferometry, typically with a fiber …
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Development and investigation of devices for ultrahigh speed gastrointestinal Optical Coherence Tomography imaging
… including white light endoscopy, narrowband imaging and confocal laser endomicroscopy have enabled in vivo assessment to guide biopsies, but suffer from technical limitations and have demonstrated suboptimal sensitivity and specificity to neoplasia. Optical Coherence Tomography (OCT) can …
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Design and characterization of the measurement electronics for a magnetic induction tomography imaging system
… transceiver circuit for magnetic induction tomography (MIT) has been developed. MIT is a type of tomography technique that is sensitive to the conductivity of objects, and which can be used in both industrial and biomedical applications. A detailed design process of the MIT transceiver board …
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Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques
Being the driest continent in the world, there is a significant reliance on groundwater resources within many communities and industries throughout Australia. Particularly in regional areas with low rainfall and surface runoff resources, the underlying groundwater availability plays a pivotal role …
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A tri-modality x-ray fluorescence, x-ray luminescence, x-ray transmission computed tomography imaging platform for monitoring and stimulating metal-containing nanoparticles
… (XFCT) and X-ray luminescence computed tomography (XLCT) to monitor the therapeutic delivery during radiation therapy. X-ray Raleigh scattering (XRS) produced by the scattered monochromatic incident X-ray can also be correlated with the data from XFCT/XLCT while X-ray transmission CT (XT …
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Monte-Carlo simulations of positron emission tomography based on liquid xenon detectors
The prospects for enhanced Positron Emission Tomography imaging using liquid xenon (LXe) gamma ray detectors had been examined. Monte-Carlo simulations using GEANT4 were performed and the results were used to study the expected performance of a small animal PET scanner in comparison with a …
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Immobilization and Catheter Guidance for Breast Brachytherapy Using Patient-Specific Templates
… placement accuracy, integration of pre-operative imaging, supplemented by computerized surgical planning and mathematical optimization were used to develop and test an intra-operative immobilization and catheter guidance system. A custom-template specific to each patient with optimally-placed …
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Surface plasmon enhanced fluorescence for biological imaging : from visible to short-wave infrared
Fluorescence imaging offers high spatio-temporal resolution, low radiation dosage exposure, and low cost among all the available imaging modalities, for example, magnetic resonance imaging, computerized tomography and positron emission tomography. Imaging probes of high emissivity and …
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4D Study of Thoracic Cancer Radiation Treatment
… accomplish this goal. The application of 4D CT imaging to radiotherapy treatment planning is an active area of research with the goal to reduce the required normal tissue irradiation and improve the tumor coverage. Deformable image registration holds the key to link the information of two images …
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Improving Attenuation Correction In Hybrid Positron Emission to mography
<p>Hybrid positron emission tomography imaging techniques such as PET/CT and PET/MR have undergone significant developments over the last two decades and have played increasingly more important roles both in research and in the clinic. A unique advantage PET has over other clinical imaging …
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List Mode Reconstruction in X-Ray CT and SPECT Imaging
Since the introduction of tomography imaging in the 1970s, it has become an indispensable tool in medical imaging, driving continuous advancements in pursuit of higher image quality, reduced scan time, lower radiation doses, and more recorded attributes. List mode data, which records all attributes …
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Tau pathology, microglia activation, and network dysfunction in Alzheimer’s disease
… these issues by combining: 1) positron emission tomography imaging using the [18F-AV]-1451 tracer (measuring in vivo tau pathology) or [11C]PK11195 ligand (indexing in vivo neuroinflammation), with 2) connectivity measures of resting-state functional magnetic resonance imaging. I found increased …
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