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 55 for “"cardiac magnetic resonance"”.
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Multiparametric cardiac magnetic resonance imaging with motion compensation
Magnetic resonance imaging is a non-invasive imaging modality for the diagnosis of cardiovascular diseases. A broad range of diagnostic parameters can be obtained within a single examination, including information about morphology, physiology and tissue viability. Currently, qualitative …
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Redefinition of uraemic cardiomyopathy with cardiac magnetic resonance imaging
… in LV chamber dimensions. For these reasons, cardiac magnetic resonance imaging (CMR), by providing high fidelity measurements, potentially offers a ‘volume independent’ method of quantifying LV dimensions. Furthermore, by using gadolinium based contrast agents, tissue abnormalities …
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Cardiac magnetic resonance imaging for non-invasive detection of myocardial fibrosis
… the heart muscle, leading ultimately to impaired cardiac function, heart disease and heart failure. Therefore, it is paramount to develop non-invasive technology for the early detection of myocardial fibrosis in order to slow, treat or prevent heart disease and heart failure. Currently, detection …
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Four-Dimensional Cardiac Magnetic Resonance Analysis in Patients with Atrial Fibrillation
Atrial fibrillation (AF) is a common cardiac arrhythmia characterized by disorganized electrical activity leading to irregular contractions and impaired cardiac output. AF significantly elevates the risk of thromboembolic stroke, primarily due to thrombus formation in the left atrium (LA) and left …
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Identification of Transversely Isotropic Material Properties from Cardiac Magnetic Resonance Elastography
… stiffness is an important determinant of cardiac function, and significant increases in global stiffness are thought to be associated with some forms of diastolic heart failure. Although magnetic resonance elastography (MRE) has been used to estimate isotropic stiffness in the heart, …
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Cardiac magnetic resonance imaging assessment of aortic stenosis to improve clinical care
… The aims of this thesis are to investigate novel cardiac magnetic resonance techniques and how they can be applied to improve our decision making around the timing of valve intervention. Methods and Results Cardiac magnetic resonance imaging can detect two forms of myocardial fibrosis …
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High-field Cardiac Magnetic Resonance Imaging in Small Animal Models of Cardiovascular Disease
… when evaluating the efficacy of a potential cardiac therapy. High-field in vivo cardiac magnetic resonance imaging (CMRI) provides high-resolution anatomical images without use of ionizing radiation and is thus uniquely suited to accurately assess the LV and RV. This dissertation reports the …
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Radiofrequency Lesion Assessment by Cardiac Magnetic Resonance Imaging following Atrial Fibrillation Catheter Ablation
Single ablative therapy for PAF has moderate success and many patients present with recurrent arrhythmia. We propose that the structure of the RF lesion applied during ablation is important in determining recurrences. The nature of the RF lesion was studied using MRI with gadolinium delayed …
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Quantification of cardiac magnetic resonance imaging perfusion in the clinical setting at 3T
Dynamic contrast enhanced (DCE) cardiac magnetic resonance imaging (MRI) is well-established as a non-invasive method for qualitatively detecting obstructive coronary artery disease (CAD) which can impair myocardial blood flow and may result in myocardial infarction. Mathematical modelling of …
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Manganese porphyrin for Synthesis of Targeted Contrast Agents for Improving Specificity in Cardiac Magnetic Resonance Imaging
… information limit its effective use in cardiac imaging. Magnetic resonance imaging by comparison provides full anatomical and functional details at high resolution without ionizing radiation and is currently considered the gold standard in most cardiac imaging applications. …
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Fibroblast Growth Factor-23 and Cardiac Magnetic Resonance Indices of Myocardial Fibrosis in the Multi-Ethnic Study of Atherosclerosis
… with myocardial fibrosis using cardiovascular magnetic resonance (CMR) imaging techniques. Higher levels of Fibroblast Growth Factor-23 (FGF-23) have been linked to increased risk of all-cause mortality, cardiovascular mortality, left ventricular hypertrophy and heart failure. Histologic …
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Agreement between gadolinium-enhanced cardiac magnetic resonance and electro-anatomical maps in patients with non-ischemic dilated cardiomyopathy and ventricular arrhythmias
… gadolinium enhancement (LGE) in cardiovascular magnetic resonance (CMR) and electro-anatomical maps (EAM) of patients with non-ischemic dilated cardiomyopathy (NIDCM) and how it relates with the procedural outcome after catheter ablation of ventricular arrhythmias (VA). We identified 50 patients …
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New contributions on motion estimation through optical flow techniques applied to cardiac magnetic resonance imaging = Nuevas contribuciones en estimación de movimiento mediante técnicas de flujo óptico aplicado a imagen de resonancia magnética cardiaca
The motion estimation of cardiac tissue and its deformation has been an area of continuous major interest in medical image analysis. Non-invasive estimation of myocardial contractility is of great interest in order to detect regions with abnormal contraction or suspicion of failing arteries, …
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MRI determined tissue characterization of myocardial infiltration and fibrosis in cardiomyopathy
Cardiac Magnetic Resonance Imaging (CMRI) is an important and valuable tool in the routine management of patients with cardiovascular disease. Contrast enhanced CMRI allows detection of ischemic and scarred myocardium, including rare infiltrative processes that cause cardiomyopathies. Amyloidosis …
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Computational biomechanics in the remodelling rat heart post myocardial infarction
… rat heart geometries were developed from cardiac magnetic resonance images of a healthy heart and a heart with left ventricular (LV) infarction two weeks and four weeks after infarct induction. From these geometries, FE models were established. To represent the myocardium, a …
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Image processing in echography and MRI
… in 3D ultrasound, left ventricle detection in cardiac magnetic resonance imaging<br/>(MRI) and flow feature visualisation in velocity MRI.<br/><br/>For speckle detection, a learning from data approach was taken using pattern recognition<br/>principles and low-level image features, including …
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Computer Aided Analysis of Late Gadolinium Enhanced Cardiac MRI
… and therapy planning. Among various clinical cardiac scans, late gadolinium enhanced (LGE) cardiac magnetic resonance (CMR) imaging can directly visualize and thus discriminate non-viable myocardium (i.e., infarcts) from normal myocardium via hyper-enhanced intensities. Since manual analysis …
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Magnetic Resonance Imaging of the Heart and Vasculature at 3 Tesla: Novel Strategies for the Diagnosis and Risk Stratification of Cardiovascular Disease
… using steady-state free precession (SSFP) cardiac magnetic resonance; (2) to explore the impact of 3T parallel imaging techniques on the assessment and reproducibility of black-blood aortic atherosclerosis imaging; and (3) to evaluate the feasibility of coronary sinus flow imaging by 3T …
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Mechanical Dyssynchrony in Heart Failure and Implications for Response and Guidance of Cardiac Resynchronisation Therapy
Cardiac Resynchronisation therapy (CRT) is an established treatment for heart failure patients with severe left ventricular (LV) dysfunction and widened QRS duration. Response to CRT remains variable. Up to 30% of patients do not gain symptomatic benefit with numbers that fail to reverse remodel …
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Ο ρόλος της μαγνητικής τομογραφίας καρδιάς στη διαστρωμάτωση κινδύνου και τη διαχείριση των ασθενών με καρδιακή σαρκοείδωση
… διαχείρισή τους. Η μαγνητική τομογραφία καρδιάς (Cardiac Magnetic Resonance, CMR) αποτελεί σήμερα βασικό απεικονιστικό εργαλείο στη διερεύνηση της καρδιακής σαρκοείδωσης, καθώς προσφέρει ολοκληρωμένη αξιολόγηση της μυοκαρδιακής δομής, της λειτουργίας και των ιστικών αλλοιώσεων. Μέσω εξειδικευμένων …
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