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 15 of 15 for “"Vascular Imaging"”.
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Three dimensional simulation of functional neuro-vascular imaging
Functional optical imaging has become a powerful tool for measuring physiological parameters in the brain without disrupting normal physiology. Fluorescence lifetime imaging (FLIM) has been shown to allow near real time mapping of oxygen tension in plasma (pO2), and Laser Speckle Contrast Imaging …
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A vascular imaging system for longitudinal registration and mapping of superficial vessels with quantitative analysis
… the peripheral arterial disease, assessment of revascularization during surgical interventions, and early assessment of skin cancer from melanoma imagery. Some non-clinical applications include biometric scanning and relocalization for ultrasound imaging. To bridge the knowledge gap between the …
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Computational Techniques for Advancing Photoacoustic Microscopy
… PAM not only enables in vivo label-free vascular imaging at the microscopic level, but also facilitates the assessment of hemodynamics and oxygen metabolism. However, challenges related to image contrast, spatial resolution, and functional analysis hinder its broad applications in …
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Non-contrast Magnetic Resonance Angiography for Evaluation of Peripheral Arterial Disease
… prevalence of up to 20% in those over 75 years. Vascular disease and kidney impairment frequently coexist; prevalence of moderate to severe renal dysfunction in PAD patients is estimated at 27-36%. Knowledge of location, severity, and extent of PAD is imperative for accurate diagnosis and …
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Near-infrared emitting quantum dots for cellular and vascular fluorescent labeling in in vivo multiplexed imaging studies
… address this problem 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 …
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Pattern and distribution of peripheral arterial disease in diabetic patients with critical limb ischemia (Rutherford Clinical Category 4-6)
… patients seen at Groote Schuur Hospital, Vascular Department. The inclusion criteria is: diabetic patients ≥18 years of age with critical limb ischemia who had pre- and post-intervention vascular imaging. The calculated minimum sample size of 63 limbs [756 patency levels (63x12)] was …
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Polymer-mediated assembly of MRI contrast agents and their use in imaging of vascular defects
… diseases, including arthritis, cancer, and cardiovascular disease. The ability to locally highlight vascular defects via medical imaging may therefore provide a way to improve diagnosis and treatment of some of the most significant diseases worldwide. As magnetic resonance imaging (MRI) provides …
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A multimodal lens into vascular recovery in a preclinical model of peripheral arterial disease
… either through injury or disease. Cardiovascular complications are among the leading causes of morbidity and mortality in diabetic patients, and account for over 80\% of diabetes-associated deaths. One of the most serious is peripheral arterial disease (PAD), which is defined as a …
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Contrast-enhanced Doppler Ultrasound Imaging using Plane Waves
There is a clear advantage in having an imaging method that would be capable of displaying perfusion and vascular imaging simultaneously. In ultrasound, Doppler can visualize veins and arteries, but cannot detect the capillary level perfusion. Conversely, microbubble contrast-enhanced ultrasound …
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Improving the Specificity of Medical Ultrasound Imaging Using Scattering Spectrum Matching
Medical ultrasound imaging systems continue to evolve at a fast pace enabled by advances in transducer technology, analog mixed-signal electronics, and high-performance computing. Ultrasound imaging is used in numerous applications, including echocardiography and peripheral vascular imaging in …
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Hyperpolarized Nuclei for NMR Imaging and Spectroscopy – Methodology and model studies of lung and vascular function
… magnetic resonance (NMR), magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) are widely used methods in medical diagnostic imaging and biological research. Clinical MRI has been restricted to imaging of protons, for reasons of sensitivity. In recent years, …
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On the origin of photons : understanding excitons and multiexcitons in colloidal semiconductor nanocrystals
… infrared-emitting nanocrystals for deep-tissue imaging in biological research. Earlier work on the subject involved the use of emitters with significantly lower quantum yield, and we demonstrated a variety of applications which make use of the high quantum yield and chemical functionality of …
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Multi-modal molecular imaging of radiation therapy response in the tumour vascular microenvironment
… with systemic chemotherapy. Recent advances in imaging have enabled precise targeting of solid lesions, yet substantial intratumoural heterogeneity means that treatment planning and monitoring remains a clinical challenge as changes in tumour size can take weeks to manifest and may be …
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Photoacoustic Microscopy and Photoacoustic Computed Tomography Using High-frequency Linear Array Ultrasonic Transducers
… tomography (PAT) is a highly promising imaging technology which forms images by detecting the induced pressure waves resulting from pulsed light absorption in biological tissues. Because the excitation source is light, PAT is a very safe, non-ionizing, and non-carcinogenic imaging …
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Ultrasound tissue perfusion imaging
… in a tissue mass is an indication of neo-vascularity and potential malignancy. Ultrasonic pulsed Doppler imaging is a safe and economical modality for noninvasive monitoring of blood flow. However, weak blood echoes make it difficult to detect perfusion using standard methods without the …