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 8 of 8 for “"X-ray phase contrast imaging"”.
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X-ray phase contrast imaging of preclinical atherosclerosis
… biochemical profile, followed by angiographic imaging. However, patients with subclinical atherosclerotic disease can also be at high risk for ACS. In fact, nearly half of the patients suffer from sudden cardiac death without any prior indication of atherosclerotic disease. For these patients, …
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Compact tomographic X-ray phase-contrast imaging of breast cancer
Non-invasive imaging plays an important role throughout the clinical diagnosis and management process of breast cancer. Unfortunately, existing imaging methods lack the combination of spatial resolution and soft-tissue contrast necessary to visualize pathological changes in the breast. X-ray …
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Developing a Microbubble-based Contrast Agent for X-ray Phase Contrast Imaging to Detect Neovasculature in Breast Cancer
X-ray phase contrast imaging (XPC) generates contrast from refraction and scattering of X-rays, unlike absorption in conventional radiology. This technique greatly improves the sharpness of boundaries and reveals micro-structured tissues that are not easily detected by conventional absorption-based …
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Investigation of alternative jet fuels in gas turbine combustion systems using x-ray radiography
… to conventional jet fuel. In this work, x-ray phase-contrast imaging is performed at 90,517 Hz on a combusting fuel spray in a realistic gas turbine combustor, allowing characterization of breakup process of fuel into ligaments and then individual droplets as it leaves a nozzle. This …
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Impact of alternative jet fuels on gas turbine combustion systems
… work focuses on the characterization of the spray and the flame dynamics and structure near the lean blowout (LBO) limit, when fuel flow rate is decreased to the point at which the flame is extinguished. To study spray droplet distributions at this condition, a 2D phase Doppler anemometer (PDA) …
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How beetles explode : new insights into the operation, structure, and materials of bombardier beetle (Brachinini) defensive glands
… bodies to synthesize and eject a hot, noxious spray at attackers. The chemical reactions that enable this process are well understood, but many aspects of the beetles' two-chambered defensive glands, which house the explosions and produce the defensive spray, remain unexplored. In this Thesis, I …
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Energy localization and heat generation in composite energetic systems under high-frequency mechanical excitation
… and binder.</p> <p>Finally, high speed X-ray phase contrast imaging and high speed visible microscopy were used to demonstrate the individual heating mechanisms associated with the heating and subsequent decomposition of an HMX particle within a viscoelastic binder under ultrasonic …
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Fabrication of high-throughput critical-angle X-ray transmission gratings for wavelength-dispersive spectroscopy
… resolving power of future space-based, soft x-ray spectrometers. This will enhance further studies of the universe's make-up, such as the composition of the intergalactic medium, black holes, neutron stars and other high energy sources. Conceptually, x-rays are reflected in the device off …