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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 399 for “"lumen"”.
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LUMEN SEGMENTATION IN INTRAVASCULAR ULTRASOUND DATA
… of IVUS images refers to the delineation of the lumen/ intima and media/adventitia interfaces of the vessel. This process is necessary for assessing morphological characteristics of the vessel such as lumen diameter, minimum lumen cross-section area, and total atheroma volume. This information is …
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Lumen Air : “the day I started an airline”
This project developed a custom programmable interior aviation lighting system prototype to better acclimate the body clock of passengers traveling on eight-hour plus flights to the time zone of their destination, thereby providing a more pleasant and peaceful journey. To achieve this end, I …
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Ovarian Steroids in Uterine Lumen and in Follicular Fluid
Made available in DSpace on 2015-05-13T15:28:08Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7624076.PDF: 5642271 bytes, checksum: 5d5dfdff385146183560c3b559592fc8 (MD5) Previous issue date: 1976
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Rab11 Regulates Lumen Formation and Morphogenesis in the Developing Pancreas
The molecular links between epithelial lumenogenesis and tissue-level morphogenesis in the pancreas remain elusive despite a decade of studies. Here, I show that deletion of Rab11A and Rab11B (Rab11) in the developing pancreatic epithelium (Rab11pancDKO) disrupts both of these processes. The loss …
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Multi-Frequency Processing for Lumen Enhancement with Wideband Intravascular Ultrasound
… blood scattering echoes may obscure the arterial lumen and make image interpretation difficult. Blood backscatter levels increase with transmission center frequency at a much greater rate compared to arterial tissue. These different frequency dependencies provide a potential method to distinguish …
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Quantifying Atherosclerosis: IVUS Imaging For Lumen Border Detection And Plaque Characterization
… is devoted to automatic detection of lumen borders in IVUS grayscale images acquired with high frequency (40 MHz up) transducers where more scattering exhibited within lumen area that makes the problem of interest more challenging. We established our framework on three-dimensional …
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Effect of lumen acidity and osmolality on duodenal blood flow and motility
Thesis (M.S.)--Michigan State University. Dept. of Physiology, 1971
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Mechanisms and dynamics of size regulation and lumen formation in mouse double embryos
… a process of epithelialization to form a lumen that later will become the pro-amniotic cavity, an essential morphogenetic event that is delayed in double embryos compared to normal-sized embryos. Mechanistic studies demonstrate that pro-amniotic cavity formation and size-regulation, albeit …
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Molecular control of endothelial lumen formation by Rho GTPases in three dimensional collagen matrices
… Rac1 play a key role in endothelial cell (EC) lumen and tube formation in 3D collagen matrices, and that their regulation is mediated by various downstream effectors including Pak2, Pak4, Par3, and Par6b. Both Pak2 and Pak4 phosphorylation strongly correlate with the lumen formation process in …
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Transformer-Based Prediction of Coronary Artery Lumen Expansion Post Angioplasty Using Optical Coherence Tomography
… eccentricity and size, wall thickness, and prior lumen size. Being able to accurately assess whether a stent will properly expand allows cardiologists to pursue pre-stenting calcium lesion modification strategies that help avoid dangerous complications of improper stenting. This work introduces a …
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Geo-UNet: A Geometrically Constrained Neural Framework for Clinical-Grade Lumen Segmentation in Intravascular Ultrasound
Precisely estimating lumen boundaries in intravascular ultrasound (IVUS) is needed for sizing interventional stents to treat deep vein thrombosis (DVT). Unfortunately, current segmentation networks like the UNet lack the precision required for clinical adoption in IVUS workflows. This arises due to …
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Rasa3 controls turnover of endothelial cell adhesion and vascular lumen integrity by a Rap1-dependent mechanism
… observé chez les souris Rasa3-/-. Des défauts de lumenisation ont été mis en évidence chez les souris où Rasa3 est spécifiquement inactivée dans la lignée endothéliale ainsi que dans le zébrafish via l’utilisation d’un morpholino. In vitro en HUVECs, la déplétion de Rasa3 augmente l’activation de …
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The effect of a cooling cuff and moist ice pack on radial artery blood flow and lumen diameter
Submitted in partial compliance with the requirements for the Master’s Degree in Technology: Chiropractic, Durban University of Technology, Durban, South Africa, 2015.
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A Study to Demonstrate the Immediate Destination of an Embolus Formed in the Lumen of a Peripheral Venous Catheter
… destination of an embolus formed in the lumen of an intravenous catheter placed in a peripheral vessel. The hypothesis stated that clots injected into a peripheral vessel will lodge in the lungs. A subhypothesis was that the clot may lodge anywhere along the circulatory pathway.</p> …
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Cell mechanics-based modelling and in toto imaging describe a new mode of lumen formation in chicken neural tube
Lumen formation creates epithelial tubes and vesicles that underlie the morphology and function of many major organs, such as ear, brain, and lung. The specific morphogenetic pathways taken may vary between organs and species, but the resultant single lumen remains constant. In chick neurulation, …
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Assessing the impact of tablet crushing, dose, and high-calorie, high-fat meal on vericiguat absorption from the upper gastrointestinal lumen using standardized commercially available equipment and materials
Σκοπός: (1) Να συνδυαστούν μια πρόσφατα προταθείσα in vitro μεθοδολογία για την εκτίμηση της ενδογαστρικής αποσάθρωσης προϊόντων άμεσης αποδέσμευσης μετά από γεύμα υψηλής περιεκτικότητας σε θερμίδες και σε λίπη με μια βελτιστοποιημένη δυναμική in vitro διάταξη για την εκτίμηση της …
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The role of actomyosin contractility in zebrafish neural tube formation through hollowing.
… it an ideal in vivo model to study hollowing lumen formation. While the role of actomyosin contractility is well understood in primary neurulation, for example through constriction of apical-lateral junctions to mediate neural plate bending, its role in secondary neurulation is less clear. In …
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The Roles of daf-6 and Cell-Cell Interactions in Sensory Organ Morphogenesis
… of neuronal sensory endings accommodated in a lumen formed by ensheathing epithelia or glia. The generation of this structure may require cell-autonomous factors that control lumen formation, as well as cell non-autonomous factors that coordinate the morphogenesis of the lumen with the resident …
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Influence of Cellular Localization on Activity of Hydroxysteroid Dehydrogenases
… in the cytosol and endoplasmic reticulum (ER) lumen to either reduce or oxidize their steroid substrates. Our lab has extensively studied the 17beta-HSDs types 1, 2 and 3 of the short-chain oxidoreductase family, particularly human 17beta-HSD1, which favors estrone reduction to estradiol. Rat …
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Flexible memory protection for multicore processors
… one or more of these dimensions. We introduce Lumen, an access control scheme providing security, fault isolation, and efficient shared memory to any number of threads within a single address space. Lumen uses a new concurrent interval skip list (ISL) to scalably maintain and query a set of …
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