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 19 of 19 for “"Multi-Slice"”.
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Die Darstellung des Felsenbeins in der Multi-Slice-CT - ein qualitativer Vergleich mit der Single-Slice-CT
… akquirierte Einzeilen-CT-Bilder mit koronar multiplanar rekonstruierten Mehrzeilen-CT-Bildern. Die Ergebnisse zeigten dabei Folgendes: Bei 60% der anatomischen Strukturen war die Übereinstimmung der Auswerter bei den Mehrzeilen-CT-Bildern deutlich besser als bei den Einzeilen-CT-Bildern. Ein …
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Noninvasive evaluation of patients with coronary artery disease and heart failure
… met echocardiografie, nucleaire technieken en multi slice CT 3. Nietinvasieve prognostische markers waaronder nuchtere glycemie en determinanten van inspanningscapaciteit
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Finite element analysis and design optimisation of shaded pole induction motors
… eddy-current FE model was developed. The multi-slice technique, justified as the more efficient way to consider the effect of a skewed rotor, has been adopted in the model. For the first time,the end-ring resistance was investigated under the condition that the end-ring current distributes …
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Target localization in MRI-guided prostate biopsy
… and 4.3 mm, respectively. 3. Development of a multi-slice-to-volume registration for intra-operative target localization. The algorithm aligns the planning volume with three orthogonal image slices of the prostate acquired immediately before needle insertion. It consists of a rigid registration …
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Computed tomography of cats without general anesthesia: feasibility, protocol development and assessment of cats with thoracic disease
… two awake normal cats were imaged using a 16 multi-slice helical CT unit to evaluate dose equivalent protocols. Two different x-ray tube potentials (kV’s), 80 and 120, and 2 different helical pitches, 0.562 and 1.75, were evaluated. The signal intensity of the pulmonary parenchyma (SIlung), …
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Image Reconstruction for X-ray Computed Tomography in Security Screening Applications
… is a mapping of a fully 3D MBIR algorithm to a multi-slice helical-scan CT system certified for baggage screening. Model enhancements for the system are discussed, and MBIR reconstructions are presented alongside direct reconstructions for a set of real baggage scans. Also investigated is the …
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Simultaneous multislice spiral and EPI chemical shift imaging
… I investigate the possibility of using 2D slice excitation methods with simultaneous multi-slice excitation and the associated reconstructions to address some of the limitations of 3D excitations with the goal of increasing the overall efficiency of the MRSI acquisition and acquiring one …
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Classification of atherosclerotic plaque vulnerability by mechano-radiomics
… and calcification. Methods: Two-dimensional, multi-contrast carotid MR images of 110 patients from the CARE-II multi-centre carotid imaging trial (ClinicalTrials.gov Identifier: NCT02017756) were used to perform the analysis – 55 for the radiomics analysis, and 87 for the 3D modelling of the …
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Deep learning in sequential data analysis
… information for the super-resolution task using multi-slice computed tomography image sequences, and for the object detection and tracking task using multi-frame videos. We demonstrate how we integrate sequential information into modern image-based deep learning systems for these different tasks …
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Characterizing canine dose from external beam irradiation
… University recently integrated a large bore multi-slice Positron Emission Tomography and Computed Tomography (PET/CT) scanner into the Veterinary Teaching Hospital. The new PET/CT and high volume of canine CT imaging exams provides a unique opportunity for research into canine organ dose that …
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Multiparametric Estimation of Brain Hemodynamics with MR Fingerprinting ASL
… However, the signal from ASL is affected by multiple parameters in the kinetic model, causing the complexity in interpreting the underlying physiological mechanism. This thesis develops a novel non-contrast technique for assessing multiple hemodynamic parameters in a single MR scan less than …
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Erweiterte Phasenkodier-Trajektorien für kontinuierliche NMR-Tomographie
Das starre Aufnahmeschema konventioneller 2-dimensionaler Mehrschichtbildgebung verursacht eine unerwünschte wechselseititge Abhängigkeit von Kontrast- und Auflösungsparametern eines MR-Bildes. So ist z.B. die Anzahl der Scheiben, die in einer Messung aufgenommen werden können, durch die …
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Funktionsdiagnostik des Herzens mittels Dual-Source-Computertomographie im Vergleich zur Magnetresonanztomographie : eine tierexperimentelle Studie an Schweinen
… already examined the correlation of conventional multi-slice spiral computed tomography (MSCT) and MRI while determining the cardiac volumetry. Good to excellent analogies were discovered. The distinctiveness of dual-source computed tomography (DSCT) is to be found in its two tube detector …
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Advanced Techniques for Cardiovascular Magnetic Resonance Imaging in Cases of Irregular Motion
… is presented. This allows for a synchronised multi-slice ac-quisition of the heart without the need of an external ECG and could provide new methods to address arrhythmic heart beats. In conclusion, the approaches detailed in this thesis provide imaging methods which may not only be beneficial …
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Efficient radio resource management for the fifth generation slice networks
… and resources of the mobile network to be “sliced” into logical networks, which are operated by different entities, and then engineered to address the specific requirements of different verticals, business models, and individual subscribers. Network slicing offers propitious solutions to the …
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Improved Visualization and Quantification for Hyperpolarized 129Xe MRI
… not be possible to disseminate 129Xe MRI for multi-center clinical trials.</p><p>The objective of this work is to establish a robust and comprehensive 129Xe ventilation MRI clinical workflow to investigate pulmonary disorders, and to lay the foundation for clinical deployment and multi-center …
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Excitation and readout Designs for high field spectroscopic imaging
… field. Our method achieves high-fidelity single-slice excitation and reception field mapping in 20 seconds, and we propose ways to extend this to multi-slice mapping in two minutes for twenty slices. A fundamental constraint to the application of pTx is the management of the deposition of power …
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Development of a patient-specific finite element model of the transcatheter aortic valve implantation (TAVI) procedure
… aortic roots and leaflets from the provided Multi-Slice Computer Tomography (MSCT) images of the patients. An anisotropic hyperelastic material model was implemented for the roots and leaflets, using two and one families of collagen fibres for their tissues respectively. The stent is made of …
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Uraemic vascular damage and calcification in children with chronic kidney disease
… intima media thickness, pulse wave velocity and multi-slice CT scan, I have studied a cohort of children on chronic dialysis, and shown that those with mean parathyroid hormone levels above twice the upper limit of normal had increased vascular thickness, stiffer vessels and a higher prevalence …