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 11 of 11 for “"MR angiography"”.
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Magnetic resonance imaging modeling and applications to fast imaging and guidance of ultrasound surgery.
Magnetic Resonance Imaging (MRI) is the only known radiological modality that provides a diagnostic cross sectional images non-invasively in virtually any orientation without patient repositioning. The principles of MRI are based on Bloch's equations, which describe the behavior of proton molecules …
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EVALUATION OF INTERPOLATION AND REGISTRATION TECHNIQUES IN MAGNETIC RESONANCE IMAGE FOR ORTHOGONAL PLANE SUPER RESOLUTION RECONSTRUCTION
… use this concept on magnetic resonance imaging (MRI) data, for which the standard is to scan in several-plane orientation in a 2D fashion. As a result, clinical MRI, functional MRI (FMRI), diffusion weighted imaging (DWI)/diffusion tensor imaging (DTI), and MR angiography (MRA) tend to have high …
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Motion -Compensated 3-D Generalized Series Imaging
Three-dimensional magnetic resonance (MR) imaging is highly desirable from the standpoints of minimum voxel size, volumetric coverage and signal-to-noise efficiency. Unfortunately, long scan times have traditionally precluded the use of 3-D imaging in applications where simultaneous resolution of …
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Flow velocity measurement in haemodialysis access using 4D MRI
… the required imaging was provided by contrasted MRI, contraindicated in renal failure. Haemodynamic data was prvided by, amongst other things, duplex Doppler. New MRI software that provides imaging data as well as haemodynamic information without using contrast could be used to provide new …
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Diagnostik der Becken-Bein-Gefässe mittels kontrastmittelangehobener 3D-MR-Angiographie
OBJECTIVE: To evaluate contrast-enhanced 3D-MR-Angiography for the assessment of peripheral arteries from the abdominal aorta to the lower leg arteries. METHODS: 3D-MRA was performed in 62 patients, using a Gd-DTPA enhanced T1 weighted 3D gradient-echo sequence (FFE). Results for 23 vascular …
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Experimentelle Magnetresonanzangiographie unter Verwendung von kontrastangehobenen und flußrichtungssensitiven Meßtechniken
… and further development of a new flow sensitive MR protocol in a pig model. 2.To prove the value of blood pool contrast agents in MR coronary angiography using an established ultrafast two dimensional gradient echo sequence. Material and methods: After verification and modification of the MR …
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The study of blood flow in human arterial bifurcations by the combination of CFD and MRI
… two new methodologies,namely magnetic resonance angiography (MRA) and computational fluid dynamics CFD), the precise patterns of flow anticipating the onset of disease at arterial bifurcations can now, in principle, be determined. However, flow simulations based on in vzvo data directly acquired …
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Interventionelle Behandlung intrakranieller Gefäßstenosen mittels ballongestützter Angioplastie und Implantation unbeschichteter und medikamentenbeschichteter Stentsysteme
… preinterventional degree of stenoses was 83.25%. MRI was carried out before and after intervention including diffusion weighting and a neurological examination. The findings of the neurological examination were retrospectively transferred to a standardised assessment during evaluation with the …
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Intracranial Vascular Findings in a Tri-Ethnic Population – MR Phenotypes and Physiological Parameters
… concerning non-ionising magnetic resonance (MR) imaging techniques, brain imaging has become a firmly established tool for this purpose in both the clinical and research settings. However, current knowledge of the cerebral circulation still remains limited. Clear evidence of the anatomical …
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Three-dimensional Quantitative Magnetic Resonance Imaging of Carotid Atherosclerotic Plaque
… multi-contrast magnetic resonance imaging (MRI) can qualitatively identify these features and monitor disease progression. Compared to traditional contrast weighted imaging, quantitative MRI could provide an objective assessment of disease. Therefore, the general hypothesis investigated in …
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Akustisches Synchronisationsverfahren für die Magnetresonanztomographie
In current clinical MR practice, cardiac motion is dealt with using electrocardiographic (ECG) gating to synchronize data acquisition with the cardiac cycle. ECG, being an inherently electrical measurement, is corrupted by interferences with electromagnetic fields and by magnetohydrodynamic …