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 163 for “"Angiography"”.
-
Optical Coherence Tomography Angiography and wide-field fluorescein angiography in Diabetic Retinopathy
Obiettivo: studiare i cambiamenti nella perfusione maculare nei pazienti affetti da edema maculare diabetico e valutare la fattibilità della fluorangiografia con ad ampio campo nella pratica clinica. Materiali e metodi: in questo studio di coorte retrospettivo sono stati inclusi pazienti caucasici …
-
A retrospective study of CT angiography versus digital subtraction angiography in penetrating neck trauma
… data validating the use of Computed Tomography Angiography (CTA) in the evaluation of penetrating neck trauma. OBJECTIVES. To assess the sensitivity and specificity of CTA versus Digital Subtraction Angiography (DSA) in detecting arterial injury and secondarily evaluate the ability of CT to …
-
Spatio-temporal data fusion in cerebral angiography
This thesis provides a framework for generating the previously unobtained high resolution time sequences of 3D images that show the dynamics of cerebral blood flow. These sequences allow image feedback during medical procedures that can facilitate the detection and observation of stenosis, …
-
Phase enhanced time-of-flight magnetic resonance angiography
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
-
Early mobilisation after coronary angiography to reduce back pain
BACKGROUND Coronary heart disease accounts for over 25,000 inpatient admissions and nearly 4,000 day-case admissions in New Zealand per year (Hay, 2004). Cardiac catheterization, via the femoral artery, is a common procedure undertaken to assess for and treat coronary heart disease (Chair, Li and …
-
Acceleration of Subtractive Non-contrast-enhanced Magnetic Resonance Angiography
Although contrast-enhanced magnetic resonance angiography (CE-MRA) is widely established as a clinical examination for the diagnosis of human vascular diseases, non-contrast-enhanced MRA (NCE-MRA) techniques have drawn increasing attention in recent years. NCE-MRA is based on the intrinsic physical …
-
Feasibility of using Lodox to perform digital subtraction angiography
… of lesions or blockages. Digital subtraction angiography (DSA) is a tool used to improve the clarity of the vessels being imaged for better and easier decision making in diagnostics and planning. Lodox, a low dose x-ray system developed by Debex (Pty) Ltd, a subsidiary of de Beers, was …
-
Haptic Simulation in Cerebral Angiography: Establishing New Clinical Competency Targets
… focusing on endovascular skills in cerebral angiography (an imaging procedure used to diagnose and treat stroke and vascular disorders), continues to rely on quantity of clinical experience rather than its quality, and has lagged in developing objective performance markers. Immersive, …
-
Detection and prediction of cardiac quiescence for computed tomography coronary angiography
… radiation dose of computed tomography coronary angiography (CTCA) imaging by developing gating techniques based on signals derived from cardiac motion, rather than the currently used electrocardiogram (ECG), to more reliably trigger data acquisition during periods of cardiac quiescence. Because …
-
Non-contrast Magnetic Resonance Angiography for Evaluation of Peripheral Arterial Disease
… disease patients. Contrast-enhanced x-ray and CT angiography are unsafe due to exposure to nephrotoxic contrast material and ionizing radiation. Recently, the FDA has also warned against the use of gadolinium-enhanced MRA (Gd-MRA) due to evidence that gadolinium could trigger a life-threatening …
-
Improving Cardiovascular Risk Assessment with CT Coronary Angiography and Myocardial CT Perfusion
… risk in various clinical settings. CT coronary angiography (CTCA) and myocardial CT perfusion (CTP) are promising techniques for the assessment of these factors. This thesis is comprised of several projects which explore refinements and new techniques aimed at improving diagnosis and risk …
-
Computer-Assisted Analysis of Arterial Narrowing in Whole-Body Magnetic Resonance Angiography
… treatments. Whole-body magnetic resonance angiography (WBMRA) offers a quantitative assessment of whole body arterial atheromatous disease burden, making it a useful diagnostic tool for CVD. However the large datasets produced are very labour-intensive to examine, and there is an unmet need …
-
Usefulness of Multidetector Computed Tomography Angiography in Vertebral and Basilar Artery Dissection
… Multi-detector computed tomography (MDCT)angiography is not only a less invasive diagnostic technique than conventional angiography but also provides high quality images. We assessed clinical manifestations and usefulness of MDCT angiography in VBAD. METHODS: We retrospectively reviewed …
-
Predicting Obstructive Coronary Artery Disease in Patients Undergoing Coronary Angiography for Stable Angina
… collected data from patients undergoing coronary angiography for the evaluation of chest pain in the Coronary Angiogram Database of South Australia (CADOSA), we constructed multivariable logistic regression models using patient demographics (age, sex), clinical history (chest pain duration, …
-
3D reconstruction of cerebral blood flow and vessel morphology from x-ray rotational angiography
… and when monitoring interventions. Rotational angiography is nowadays routinely used to determine the geometry of the cerebral vasculature. To this end, contrast agent is injected into one of the supplying arteries and the x-ray system rotates around the head of the patient while it acquires a …
-
Blood Vessel Segmentation and shape analysis for quantification of Coronary Artery Stenosis in CT Angiography
This thesis presents an automated framework for quantitative vascular shape analysis of the coronary arteries, which constitutes an important and fundamental component of an automated image-based diagnostic system. Firstly, an automated vessel segmentation algorithm is developed to extract the …
-
High A-scan rate optical coherence tomography angiography for blood flow speed quantification in the retina
Optical coherence tomography angiography (OCTA) offers non-invasive and depth-resolved imaging of the retinal vasculature. While OCTA is widely used to study retinal disease, it traditionally provides limited information about blood flow speed. This thesis introduces a second-generation variable …
Page 1 of 9