Дисертації з теми "Quantitative imaging analysis"
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Weith-Glushko, Seth A. "Quantitative analysis of infrared contrast enhancement algorithms /." Online version of thesis, 2007. http://hdl.handle.net/1850/4208.
Повний текст джерелаLi, Chengshuai. "Quantitative Anisotropy Imaging based on Spectral Interferometry." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/99424.
Повний текст джерелаPHD
Gu, Ye. "Quantitative magnetization transfer imaging: validation and analysis tool development." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123021.
Повний текст джерелаAu travers d'un processus de validation initiale, nous comparons une technique d'imagerie quantitative par transfert d'aimantation (qMT) basée sur une séquence ≪en résonance≫ en précession libre avec état d'équilibre et gradients équilibrés, à la référence communément admise que constitue le modèle ≪hors-résonance≫ en écho de gradient avec destruction de l'aimantation transversale résiduelle.Nous réalisons une simulation numérique et une analyse de sensibilité du modèle analytique et confirmons ainsi la fiabilité de ce dernier dans une gamme habituelle de paramètres de transfert d'aimantation.La comparaison in-vivo entre le modèle en état d'équilibre à précession libre et le modèle avec destruction de l'aimantation transversale résiduelle montre une cohérence. Ce nouveau modèle apparat comme valide et semble prometteur en terme d'utilisation clinique de par sa facilité d'utilisation, comparé aux méthodes existantes.Dans le cadre de ce projet, nous avons également développé un logiciel de simulation du transfert d'aimantation quantitatif facile d'emploi, ainsi qu'un outil d'analyse des données et d'ajustement du modèle. Le logiciel est sur le point d'être proposé dans le domaine public et nous espérons qu'il devienne un outil d'analyse standard pour les chercheurs et les utilisateurs du transfert d'aimantation quantitatif.
Agrawal, Vishesh. "Quantitative Imaging Analysis of Non-Small Cell Lung Cancer." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:27007763.
Повний текст джерелаHinsdale, Taylor A. "Laser Speckle Imaging: A Quantitative Tool for Flow Analysis." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1251.
Повний текст джерелаElagamy, Samar H. "Advancing ATR-FTIR Imaging into The Realm or Quantitative Analysis." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1574416533908128.
Повний текст джерелаPremraj, Senthil Kumar. "Facilitating four-dimensional quantitative analysis of aortic MRI for clinical use." Thesis, University of Iowa, 2009. https://ir.uiowa.edu/etd/260.
Повний текст джерелаSnyder, William C. "An in-scene parameter estimation method for quantitative image analysis /." Online version of thesis, 1994. http://hdl.handle.net/1850/11061.
Повний текст джерелаBiffar, Andreas. "Quantitative Analysis of Diffusion-weighted Magnetic Resonance Imaging in the Spine." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-126230.
Повний текст джерелаWang, Kun. "Medical imaging of the heart : quantitative analysis of three-dimensional echocardiographic images." Thesis, University of Newcastle Upon Tyne, 2011. http://hdl.handle.net/10443/1392.
Повний текст джерелаVogel, Abby Jeanne. "Noninvasive imaging techniques as a quantitative analysis of Kaposi's sarcoma skin lesions." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7679.
Повний текст джерелаThesis research directed by: Fischell Dept. of Bioengineering . Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
White, Nathan S. "Quantitative diffusion magnetic resonance imaging of the brain validation, acquisition, and analysis /." Diss., [La Jolla] : University of California, San Diego, 2010. http://wwwlib.umi.com/cr/ucsd/fullcit?p3389027.
Повний текст джерелаTitle from first page of PDF file (viewed Feb. 18, 2010). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
Wong, Wilbur Chun-Kit. "Segmentation algorithms for quantitative analysis of vascular abnormalities on three dimensional angiography /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?COMP%202006%20WONG.
Повний текст джерелаBernhem, Kristoffer. "Quantitative bioimaging in single cell signaling." Doctoral thesis, KTH, Tillämpad fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215076.
Повний текст джерелаAvbildning av biologiska prover har i flera hundra år varit ett sätt för forskare att undersöka biologiska system. Med utvecklingen av immunofluoresens inmärkn-ing och fluoresens-mikroskopi förbättrades de viktigaste aspekterna av mikroskopi,kontrast och specificitet. Sedan 1941 har vi sett kontinuerligt mer mångsidigt och frekvent användning av fluorosense-mikroskopi i biologisk forskning. Jon-mikroskopi har länge varit en metod att studera signalering i cell-system. Genom användning av fluorosenta jon-sensorer går det att mäta variationer avjon koncentrationer i levande celler som resultat av yttre påverkan. Genom att använda Ca2+ mikroskopi har jag visat att det finns en omvänd koppling mellan kalcium-kanaler i plasma-membran och angiotensin II typ 1 receptorn (ett proteininvolverat i blodtrycksreglering). Detta har direkta implikationer för behandlingav högt blodtryck, en av de mer vanliga sjukdomarna i västvärlden idag med överen miljard drabbade patienter i världen 2016. Efter detta projekt vidgades mitt fokus till att inkludera superupplösnings-mikroskopi. Denna avhandling inkluderar ett arbete fokuserat på tolkningen av superupplösnings-mikroskopi data från neuronal Na+, K+ - ATPase α3, en jon-pump som återställer cellernas jonbalans i samband med cell signalering. Mikroskopi-datan korreleras mot elektrofysiologi experiment och modeller för att illustrera möjliga artefakter i superupplösnings-mikroskopi som måste tas i beaktande i samband med tolkning av data. Jag fortsatte med att utveckla mjukvara för analys av data från singel-molekyl-lokalisations-mikroskopi där fokuset för mjukvaran framförallt varit på användarvänligheten. Detta då jag hoppas att den kommer vara användbar för ett bredare forskingsfält. Mjukvaran användes även i ett separat projekt för att identifiera överuttrycks-artefakter i transfekterade celler. I det avslutande arbetet använder jag superupplösnings-mikroskopi för att karakterisera de tidiga stegen i mitokondriell apoptos. Jag identifierar när och var i cellen de olika proteinerna involverade i apoptos signaleringen är aktiverade och interagerar.
QC 20171003
Mehndiratta, Amit. "Quantitative measurements of cerebral hemodynamics using magnetic resonance imaging." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:b9dfb1a4-f297-47b9-a95f-b60750065008.
Повний текст джерелаUthama, Ashish. "3D spherical harmonic invariant features for sensitive and robust quantitative shape and function analysis in brain MRI." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/438.
Повний текст джерелаChen, Shichao. "High-sensitivity Full-field Quantitative Phase Imaging Based on Wavelength Shifting Interferometry." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/102502.
Повний текст джерелаDoctor of Philosophy
Liang, Xuwei. "MODELING AND QUANTITATIVE ANALYSIS OF WHITE MATTER FIBER TRACTS IN DIFFUSION TENSOR IMAGING." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/818.
Повний текст джерелаRivière, Bathilde. "Objective and quantitative analysis of corneal transparency with clinical (in vivo) imaging technology." Thesis, KTH, Tillämpad fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-241543.
Повний текст джерелаKreilkamp, Barbara A. K. "Advanced magnetic resonance imaging and quantitative analysis approaches in patients with refractory focal epilepsy." Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3017303/.
Повний текст джерелаMani, Meenakshi. "Quantitative Analysis of Open Curves in Brain Imaging: Applications to White Matter Fibers and Sulci." Phd thesis, Université Rennes 1, 2011. http://tel.archives-ouvertes.fr/tel-00851505.
Повний текст джерелаMani, Meenakshi. "Quantitative analysis of open curves in brain imaging : applications to white matter fibres and sulci." Rennes 1, 2011. http://www.theses.fr/2011REN1S026.
Повний текст джерелаCette thèse se propose d'étudier comment les caractéristiques des courbes ouvertes peuvent être exploitées afin d'analyser quantitativement les sillons corticaux et les faisceaux de matière blanche. Les quatre caractéristiques d'une courbe ouverte--forme, taille, orientation et position--ont des propriétés différentes, si bien que l'approche usuelle est de traiter chacune séparément à l'aide d'une métrique ad hoc. Nous introduisons un cadre riemannien adapté dans lequel il est possible de fusionner les espaces de caractéristiques afin d'analyser conjointement plusieurs caractéristiques. Cette approche permet d'apparier et de comparer des courbes suivant des distances géodésiques. Les correspondances entre courbes sont établies automatiquement en utilisant une métrique élastique. Dans cette thèse, nous validerons les métriques introduites et nous montrerons leurs applications pratiques, entre autres dans le cadre de plusieurs problèmes cliniques importants. Dans un premier temps, nous étudierons spécifiquement les fibres du corps calleux, afin de montrer comment le choix de la métrique influe sur le résultat du clustering. Nous proposons ensuite des outils permettant de calculer des statistiques sommaires sur les courbes, ce qui est un premier pas vers leur analyse statistique. Nous représentons les groupes de faisceaux par la moyenne et la variance de leurs principales caractéristiques, ce qui permet de réduire le volume des données dans l'analyse des faisceaux de matière blanche. Ensuite, nous présentons des méthodes permettant de détecter les changements morphologiques et les atteintes de la matière blanche. Quant aux sillons corticaux, nous nous intéressons au problème de leur labellisation
Vogel, Abby Jeanne. "Non-invasive imaging techniques as a quantitative analysis of skin damage due to ionizing radiation." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1667.
Повний текст джерелаThesis research directed by: Dept. of Biological Resources Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Yu, Boliang. "3D analysis of bone ultra structure from phase nano-CT imaging." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI016/document.
Повний текст джерелаOsteoporosis is a bone fragility disease resulting in abnormalities in bone mass and density. In order to prevent osteoporotic fractures, it is important to have a better understanding of the processes involved in fracture at various scales. As the most abundant bone cells, osteocytes may act as orchestrators of bone remodeling which regulate the activities of both osteoclasts and osteoblasts. The osteocyte system is deeply embedded inside the bone matrix and also called lacuno-canalicular network (LCN). Although several imaging techniques have recently been proposed, the 3D observation and analysis of the LCN at high spatial resolution is still challenging. The aim of this work was to investigate and analyze the LCN in human cortical bone in three dimensions with an isotropic spatial resolution using magnified X-ray phase nano-CT. We performed image acquisition at different voxel sizes of 120 nm, 100 nm, 50 nm and 30 nm in the beamlines ID16A and ID16B of the European Synchrotron Radiation Facility (ESRF - European Synchrotron Radiation Facility - Grenoble). Our first study concerned phase retrieval, which is the first step of data processing and consists in solving a non-linear inverse problem. We proposed an extension of Paganin’s method suited to multi-distance acquisitions, which has been used to retrieve phase maps in our experiments. The method was compared theoretically and experimentally to the contrast transfer function (CTF) approach for homogeneous object. The analysis of the 3D reconstructed images requires first to segment the LCN, including both the segmentation of lacunae and of canaliculi. We developed a workflow based on median filter, hysteresis thresholding and morphology filters to segment lacunae. Concerning the segmentation of canaliculi, we made use of the vesselness enhancement to improve the visibility of line structures, the variational region growing to extract canaliculi and connected components analysis to remove residual noise. For the quantitative assessment of the LCN, we calculated morphological descriptors based on an automatic and efficient 3D analysis method developed in our group. For the lacunae, we calculated some parameters like the number of lacunae, the bone volume, the total volume of all lacunae, the lacunar volume density, the average lacunae volume, the average lacunae surface, the average length, width and depth of lacunae. For the canaliculi, we first computed the total volume of all the canaliculi and canalicular volume density. Moreover, we counted the number of canaliculi at different distances from the surface of each lacuna by an automatic method, which could be used to evaluate the ramification of canaliculi. We reported the statistical results obtained on the different groups and at different spatial resolutions, providing unique information about the organization of the LCN in human bone in three dimensions
Selva, Luis Enrique. "Quantitative multivariate analysis of human brain structures in vivo using magnetic resonance imaging at 3.0 tesla." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1692357341&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Повний текст джерелаDwyer, Michael G. "Development and application of novel algorithms for quantitative analysis of magnetic resonance imaging in multiple sclerosis." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/6298.
Повний текст джерелаRonteix, Gustave. "Inferring cell-cell interactions from quantitative analysis of microscopy images." Thesis, Institut polytechnique de Paris, 2021. http://www.theses.fr/2021IPPAX111.
Повний текст джерелаIn his prescient article “More is different”, P. W. Anderson counters the reductionist argument by highlighting the crucial role of emergent properties in science. This is particularly true in biology, where complex macroscopic behaviours stem from communication and interaction loops between much simpler elements. As an illustration, I hereby present three different instances in which I developed and used quantitative methods in order to learn new biological processes.For instance, the regulation and eventual rejection of tumours by the immune system is the result of multiple positive and negative regulation networks, influencing both the behaviour of the cancerous and immune cells. To mimic these complex effects in-vitro, I designed a microfluidic assay to challenge melanoma tumour spheroids with multiple T cells and observe the resulting interactions with high spatiotemporal resolution over long (>24h) periods of time. Using advanced image analysis combined with mathematical modelling I demonstrate that a positive feedback loop drives T cell accumulation to the tumour site, leading to enhanced spheroid fragmentation. This study sheds light on the initiation if the immune response at the single cell scale: showing that even the very first contact between T cell and tumour spheroid increases the probability of the next T cell to come to the tumour. It also shows that it is possible to recapitulate complex antagonistic behaviours in-vitro, which paves the way for the elaboration of more sophisticated protocols, involving for example a more complex tumour micro-environment.Many biological processes are the result of complex interactions between cell types, particularly so during development. The foetal liver is the locus of the maturation and expansion of the hematopoietic system, yet little is known about its structure and organisation. New experimental protocols have been recently developed to image this organ and I developed tools to interpret and quantify these data, enabling the construction of a “network twin” of each foetal liver. This method makes it possible to combine the single-cell scale and the organ scale in the analysis, revealing the accumulation of myeloid cells around the blood vessels irrigating the foetal liver at the final stages of organ development. In the future, this technique will make it possible to analyse precisely the environmental niches of cell types of interest in a quantitative manner. This in turn could help us understand the developmental steps of crucial cell types such as hematopoietic stem cells.The interactions between bacteria and their environment is key to understanding the emergence of complex collective behaviours such a biofilm formation. One mechanism of interest is that of rheotaxis, whereby bacterial motion is driven by gradients in the shear stress of the fluid the cells are moving in. I developed a framework to calculate the semi-analytical equations guiding bacteria movement in shear stress. These equations predict behaviours that aren’t observed experimentally, but the discrepancy is solved once rotational diffusion is taken into account. Experimental results are well-fitted by the theoretical prediction: bacteria in droplets segregate asymmetrically when a shear is generated in the media.Although relating to very different topics, these three studies highlight the pertinence of quantitative approaches for understanding complex biological phenomena: biological systems are more than the sum of their constituents.a
Verkhedkar, Ketki Dinesh. "Quantitative Analysis of DNA Repair and p53 in Individual Human Cells." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10660.
Повний текст джерелаMillichope, Allen John. "Application of a charge coupled device Raman microscope imaging system for quantitative analysis of aqueous surfactant phases." Thesis, Liverpool John Moores University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327678.
Повний текст джерелаStacke, Karin. "Automatic Brain Segmentation into Substructures Using Quantitative MRI." Thesis, Linköpings universitet, Datorseende, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-128900.
Повний текст джерелаMiller, Brandon Lee. "Quantitative, Multiparameter Analysis of Fluorescently Stained, Negatively Enriched, Peripheral Blood from Cancer Patients." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1386005404.
Повний текст джерелаGulley-Stahl, Heather Jane. "An Investigation into Quantitative ATR-FT-IR Imaging and Raman Microspectroscopy of Small Mineral Inclusions in Kidney Biopsies." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1272042834.
Повний текст джерелаCallen, David James Anthony. "Quantitative analysis of changes in limbic structures in probable Alzheimer's disease using coregistered SPECT and magnetic resonance imaging." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0028/NQ49952.pdf.
Повний текст джерелаJacobs, Emily Jean. "Spatial Resolution of Quantitative Electroencephalography and Functional Magnetic Resonance Imaging During Phoneme Discrimination Tasks: An Abbreviated Meta-Analysis." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/8938.
Повний текст джерелаUeda, Maho. "Combined multiphoton imaging and biaxial tissue extension for quantitative analysis of geometric fiber organization in human reticular dermis." Kyoto University, 2020. http://hdl.handle.net/2433/253178.
Повний текст джерелаWang, Renjie. "Quantitative analysis of chromatin dynamics and nuclear geometry in living yeast cells." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30122/document.
Повний текст джерелаChromosome high-order architecture has been increasingly studied over the last decade thanks to technological breakthroughs in imaging and in molecular biology. It is now established that structural organization of the genome is a key determinant in all aspects of genomic transactions. Although several models have been proposed to describe the folding of chromosomes, the physical principles governing their organization are still largely debated. Nucleus is the cell’s compartment in which chromosomal DNA is confined. Geometrical constrains imposed by nuclear confinement are expected to affect high-order chromatin structure. However, the quantitative measurement of the influence of the nuclear structure on the genome organization is unknown, mostly because accurate nuclear shape and size determination is technically challenging. This thesis was organized along two axes: the first aim of my project was to study the dynamics and physical properties of chromatin in the S. cerevisiae yeast nucleus. The second objective I had was to develop techniques to detect and analyze the nuclear 3D geomtry with high accuracy. Ribosomal DNA (rDNA) is the repetitive sequences which clustered in the nucleolus in budding yeast cells. First, I studied the dynamics of non-rDNA and rDNA in exponentially growing yeast cells. The motion of the non-rDNA could be modeled as a two-regime Rouse model. The dynamics of rDNA was very different and could be fitted well with a power law of scaling exponent ~0.7. Furthermore, we compared the dynamics change of non-rDNA in WT strains and temperature sensitive (TS) strains before and after global transcription was actived. The fluctuations of non-rDNA genes after transcriptional inactivation were much higher than in the control strain. The motion of the chromatin was still consistent with the Rouse model. We propose that the chromatin in living cells is best modeled using an alternative Rouse model: the “branched Rouse polymer”. Second, we developed “NucQuant”, an automated fluorescent localization method which accurately interpolates the nuclear envelope (NE) position in a large cell population. This algorithm includes a post-acquisition correction of the measurement bias due to spherical aberration along Z-axis. “NucQuant” can be used to determine the nuclear geometry under different conditions. Combined with microfluidic technology, I could accurately estimate the shape and size of the nuclei in 3D along entire cell cycle. “NucQuant” was also utilized to detect the distribution of nuclear pore complexes (NPCs) clusters under different conditions, and revealed their non-homogeneous distribution. Upon reduction of the nucleolar volume, NPCs are concentrated in the NE flanking the nucleolus, suggesting a physical link between NPCs and the nucleolar content. In conclusion, we have further explored the biophysical properties of the chromatin, and proposed that chromatin in the nucleoplasm can be modeled as "branched Rouse polymers". Moreover, we have developed “NucQuant”, a set of computational tools to facilitate the study of the nuclear shape and size. Further analysis will be required to reveal the links between the nucleus geometry and the chromatin dynamics
Lee, Paul Chong Chan. "A QUALITATIVE AND QUANTITATIVE ANALYSIS OF SOFT TISSUE CHANGE EVALUATION BY ORTHODONTISTS IN CLASS II NON EXTRACTION ORTHODONTIC TREATMENT USING THE 3dMD SYSTEM." Master's thesis, Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/217032.
Повний текст джерелаM.S.
With the advent of cephalometrics in the 1930s, numerous studies have focused on the profile of a face to achieve a more esthetic orthodontic treatment outcome. With such heavy emphasis on facial esthetics, a shift in focus from the profile view to the oblique view has become necessary as the smile in the oblique view is what the general public evaluates. The purpose of this pilot study was to determine whether the current tools for diagnosis and treatment evaluation are sufficient. Currently, 2-dimensional composite photographs are utilized in evaluating the soft tissue. At Temple University, 3-dimensional images, which show all sides of the patient's face, are used adjunctively to 2-dimensional composite photographs. In this study, faculty members at the Temple University Department of Orthodontics were asked to complete surveys after viewing two different image modalities, 2-dimensional images and a 3-dimensional video of the same patient. They were asked to fill out the soft tissue goals for specific facial landmarks. Patient photos were in the smiling view as current literature lacks studies on this view. Faculty members' responses from analyzing the 2-dimensional images and 3-dimensional video for each patient were compared to determine which areas had frequent discrepancies from using two different image modalities. During the survey, a voice recorder captured any comments regarding the images. The ultimate goal of this qualitative pilot study was to identify when 3-dimensional imaging is necessary in treatment planning and evaluation, with an added hope to further advance research in 3-dimensional imaging and its vast possibilities to advance the field of orthodontics. Based on the data collected, the following conclusions were made: 1. The qualitative data highlighted that 3-dimensional imaging would be necessary in cases with skeletal deformities. 2. In the oblique view, 3-dimensional imaging is superior than 2-dimensional imaging by showing more accurate shadow, contour, and depth of the soft tissue. 3. Further improvement is necessary to create a virtual patient with treatment simulation abilities. 4. The comfort level among orthodontists of 2-dimensional imaging was higher than 3-dimensional imaging. With more widespread use of 3-dimensional imaging, more orthodontists may gradually reach a higher comfort level in using this relatively new technology. 5. Faculty members expressed high willingness to use 3-dimensional imaging if improvement in new technology could allow for more manipulation and accurate soft tissue prediction. 6. 3-dimensional imaging is superior in its efficiency, quick capture time, and lack of need for multiple images. Implementation of 3-dimensional imaging could streamline the records process and help with practice efficiency without compromising the image quality. 7. Both patients and orthodontists may benefit from using 3-dimensional imaging. Patients can see an accurate representation of themselves and possibly view their own treatment simulation upon further improvement in current technology. Orthodontists would benefit with much more accurate images that may serve as the virtual patient. 8. Besides the exorbitantly high cost, faculty members thought that more advances were needed and the current benefit was not great enough to justify the investment. The results were consistent with other studies that used the oblique view in that the 2-dimensional oblique view lacks depth and does not provide adequate information. With further improvement in current 3-dimensional imaging, this technology can benefit orthodontists in visualizing their patients. In addition, patients can benefit by hopefully seeing a live and accurate simulation of themselves instantly as a virtual patient. With these benefits of 3-dimensional imaging, it may one day be the new standard in patient records in the field of orthodontics.
Temple University--Theses
Nordbrøden, Mats. "Optimization of Magnetic Resonance Diffusion Tensor Imaging for Visualization and Quantification of Periprostatic Nerve Fibers." Thesis, KTH, Skolan för teknik och hälsa (STH), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-179658.
Повний текст джерелаXiong, Fengzhu. "Integrated Analysis of Patterning, Morphogenesis, and Cell Divisions in Embryonic Development by in toto Imaging and Quantitative Cell Tracking." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11160.
Повний текст джерелаAlizadeh, Mahdi. "Multi Spectral Data Analysis for Diagnostic Enhancement of Pediatric Spinal Cord Injury." Diss., Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/422530.
Повний текст джерелаPh.D.
A key challenge in the imaging of spinal cord injury (SCI) patients is the ability to accurately determine structural or functional abnormality as well as level and severity of injury. Over the years a substantial number of studies have addressed this issue, however most of them utilized qualitative analysis of the acquired imaging data. Quantitative analysis of patients with SCI is an important issue in both diagnostic and treatment planning. Hence in this work new multispectral magnetic resonance (MR) image based approaches were developed for high-throughput extraction of quantitative features from pediatric spinal cord MR images and subsequent analysis using decision support algorithms. This may potentially improve diagnostic, prognostic, and predictive accuracy between typically developing (TD) pediatric spinal cord subjects and patients with SCI. The technique extracts information from both axial structural MRI images (such as T2-weighted gradient echo images) and functional MRI images (such as diffusion tensor images). The extracted data contains first order statistics (diffusion tensor tractography and histogram based texture descriptors), second order (co-occurrence indices) and high order (wavelet primitives) statistics. MRI data from total of 43 subjects that includes 23 healthy TD subjects with the age range of 6-16 (11.94±3.26 (mean ±standard deviation)) who had no evidence of SCI or pathology and 20 SCI subjects with the age range of 7-16 (11.28±3.00 (mean ±standard deviation)) were recruited and scanned using 3.0T Siemens Verio MR scanner. Standard 4-channel neck matrix and 8-channel spine array RF coils were used for data collection. After data collection various post processing methods were used to improve the data quality. A novel ghost artifact suppression technique was implemented and tested. Initially, 168 quantitative measures of multi-spectral images (functional and structural) were calculated by using regions of interest (ROIs) manually drawn on the whole cord along the entire spinal cord being anatomically localized by an independent board certified neuroradiologist. These measures were then statistically compared between TD and SCI groups using standard least squared linear regression model based on restricted maximum likelihood (REML) method. Statistically, significant changes have been shown in 44 features: 30 features obtained from functional images and 14 features selected from structural images. Also, it has been shown that the quantitative measures of the spinal cord in DTI and T2W-GRE images above and below injury level were altered significantly. Finally, tractography measures were also obtained on a subset of the patients to demonstrate quantitative analysis of the extracted white matter structures. Overall the results show that the proposed techniques may have potential to be used as surrogate biomarkers for detection of the injured spinal cord. These measures enable us to quantify the functional and structural plasticity in chronic SCI and consequently has the potential to improve our understanding of damage and recovery in diseased states of the spinal cord.
Temple University--Theses
Kawahira, Naofumi. "Quantitative analysis of 3D tissue deformation reveals key cellular mechanism associated with initial heart looping." Kyoto University, 2020. http://hdl.handle.net/2433/254507.
Повний текст джерелаAntunes, Jacob T. Antunes. "Quantitative Treatment Response Characterization In Vivo: UseCases in Renal and Rectal Cancers." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1467987922.
Повний текст джерелаMorimoto, Emiko. "Evaluation of Focus Laterality in Temporal Lobe Epilepsy: A Quantitative Study Comparing Double Inversion-Recovery MR Imaging at 3T with FDG-PET." Kyoto University, 2014. http://hdl.handle.net/2433/189344.
Повний текст джерелаNegre, Erwan. "Couplage ablation laser et imagerie spectrale rapide pour identification et analyses de plastiques : concept, développement et validation." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1036/document.
Повний текст джерелаLaser Induced Breakdown Spectroscopy (LIBS) is an analytical technique based on the emission of a plasma arising from the laser-matter interaction. All the elements of the periodic table can be detected with a detection limit close to the ppm, regardless of the nature of sample: solid, liquid or gas. LIBS can perform elemental as well as molecular analysis, which makes it a trustworthy technique for the identification of organic materials, especially with reference to plastic waste sorting where the established techniques experience some difficulties to fulfill all the requirements of this issue. Nevertheless, the laser-induced plasma is a transient and inhomogeneous process regularly hard to master in comparison with an inductively coupled plasma. As a consequence, LIBS technique still remains marginal for the applications demanding a reliable and frequently quantitative information. This doctoral research, which falls within the framework of a partnership between the CRITT Matériaux Alsace and the Institut Lumière Matière in Lyon, proposes to examine the two issues mentioned above. A new LIBS instrument is first given. It is organized around several monitoring tools driven by a dedicated software which allowed us to considerably reduce the fluctuations of the LIBS signal coming from the different factors involved in the process of laser ablation (laser energy, sample and detection positions, etc…). The efficiency of this new LIBS instrument is then illustrated through the example of the quantification of trace elements in glass matrices
Varghese, Bino Abel. "Quantitative Computed-Tomography Based Bone-Strength Indicators for the Identification of Low Bone-Strength Individuals in a Clinical Environment." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1300389623.
Повний текст джерелаRisser, Laurent. "Analyse quantitative de réseaux micro-vasculaires intra-corticaux." Toulouse 3, 2007. http://www.theses.fr/2007TOU30011.
Повний текст джерелаThis work is a quantitative investigation of intra-cortical micro-vascular networks using a new micro-tomography imaging protocol which permits a complete scan of the entire gray matter with a micron resolution. The first part of the PhD is devoted to the analysis of very large 3D images coming from healthy rats and marmosets primate cortex, as well as tumour implanted rats brains. Classical methods are used for binarisation and squeletonization of the images. The influence of the experimental protocol on the obtained images is evaluated. A fast and original method is proposed to fill the gaps of incompletely injected vessels the efficiency of which is tested and validated. The second part of the PhD is concerned by the statistical analysis of geometrical, local and topological properties of micro-vascular networks. Geometrical properties are related to the spatial distribution of vessels from studying the vascular density and the vessel/tissue distance map. We brought to the fore the multi-scale properties of those fields from fractal and spectral analysis up to a some cut-off which defines the typical length-scale of an elementary representative volume. We found that this length-scale significantly differ in normal and tumoral tissues. The local analysis of vessel's segment length systematically exhibits exponential distribution, which leads to some characteristic segments length. Those length significantly differ in adult and new-born primates tissues. This analysis is consistent with the result obtained on the vascular density and leads to the conclusion that developmental angiogenesis occurs mainly at the capillary scale. .
Deshmane, Anagha Vishwas. "Partial Volume Quantification Using Magnetic Resonance Fingerprinting." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1491572611420032.
Повний текст джерелаMoles, Lopez Xavier. "Characterization and Colocalization of Tissue-Based Biomarker Expression by Quantitative Image Analysis: Development and Extraction of Novel Features." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209330.
Повний текст джерелаDoctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Li, Yubing. "Analyse de vitesse par migration quantitative dans les domaines images et données pour l’imagerie sismique." Thesis, Paris Sciences et Lettres (ComUE), 2018. http://www.theses.fr/2018PSLEM002/document.
Повний текст джерелаActive seismic experiments are widely used to characterize the structure of the subsurface. Migration Velocity Analysis techniques aim at recovering the background velocity model controlling the kinematics of wave propagation. The first step consists of obtaining the reflectivity images by migrating observed data in a given macro velocity model. The estimated model is then updated, assessing the quality of the background velocity model through the image coherency or focusing criteria. Classical migration techniques, however, do not provide a sufficiently accurate reflectivity image, leading to incorrect velocity updates. Recent investigations propose to couple the asymptotic inversion, which can remove migration artifacts in practice, to velocity analysis in the subsurface-offset domain for better robustness. This approach requires large memory and cannot be currently extended to 3D. In this thesis, I propose to transpose the strategy to the more conventional common-shot migration based velocity analysis. I analyze how the approach can deal with complex models, in particular with the presence of low velocity anomaly zones or discontinuous reflectivities. Additionally, it requires less memory than its counterpart in the subsurface-offset domain. I also propose to extend Inversion Velocity Analysis to the data-domain, leading to a more linearized inverse problem than classic waveform inversion. I establish formal links between data-fitting principle and image coherency criteria by comparing the new approach to other reflection-based waveform inversion techniques. The methodologies are developed and analyzed on 2D synthetic data sets
Fleckenstein, Florian Nima [Verfasser]. "3D Quantitative tumour burden analysis in patients with hepatocellular carcinoma before TACE : comparing single-lesion vs. multi-lesion imaging biomarkers as predictors of patient survival / Florian Nima Fleckenstein." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2018. http://d-nb.info/1153769026/34.
Повний текст джерела