Gotowe bibliografie tematyczne / Micro-CT

Gotowa bibliografia na temat „Micro-CT”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 6 września 2023

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Artykuły w czasopismach na temat "Micro-CT"

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SCHLADITZ, K. "Quantitative micro-CT". Journal of Microscopy 243, nr 2 (18.07.2011): 111–17. http://dx.doi.org/10.1111/j.1365-2818.2011.03513.x.

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Ito, Masako. "Assessment of bone quality using micro-computed tomography (micro-CT) and synchrotron micro-CT". Journal of Bone and Mineral Metabolism 23, S1 (styczeń 2005): 115–21. http://dx.doi.org/10.1007/bf03026335.

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Croteau, Etienne, Jennifer M. Renaud i Robert A. deKemp. "Cardiac Micro-PET-CT". Current Cardiovascular Imaging Reports 6, nr 2 (17.01.2013): 179–90. http://dx.doi.org/10.1007/s12410-012-9188-7.

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Matsui, E. "P-088 Micro CT". Lung Cancer 49 (lipiec 2005): S137. http://dx.doi.org/10.1016/s0169-5002(05)80582-3.

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KAMALAK, HAKAN, i HICHAM NUAIMI. "Micro-CT 1172 in Restorative Dentistry". Asian Pacific Journal of Health Sciences 1, nr 3 (lipiec 2014): 282–84. http://dx.doi.org/10.21276/apjhs.2014.1.3.26.

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Hupfer, Martin, Tristan Nowak, Robert Brauweiler, Fabian Eisa i Willi A. Kalender. "Spectral optimization for micro-CT". Medical Physics 39, nr 6Part1 (17.05.2012): 3229–39. http://dx.doi.org/10.1118/1.4718575.

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Durkee, Benjamin Y., Jamey P. Weichert i Richard B. Halberg. "Small animal micro-CT colonography". Methods 50, nr 1 (styczeń 2010): 36–41. http://dx.doi.org/10.1016/j.ymeth.2009.07.008.

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Wang, Yiwei, David F. Wertheim, Allan S. Jones i Allan G. A. Coombes. "Micro-CT in drug delivery". European Journal of Pharmaceutics and Biopharmaceutics 74, nr 1 (styczeń 2010): 41–49. http://dx.doi.org/10.1016/j.ejpb.2009.05.008.

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Müller, Bernd R., Axel Lange, Michael Harwardt i Manfred P. Hentschel. "Synchrotron-Based Micro-CT and Refraction-Enhanced Micro-CT for Non-Destructive Materials Characterisation". Advanced Engineering Materials 11, nr 6 (czerwiec 2009): 435–40. http://dx.doi.org/10.1002/adem.200800346.

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Wingham, James Robert, Robert Turner, Joanna Shepherd i Candice Majewski. "Micro-CT for analysis of laser sintered micro-composites". Rapid Prototyping Journal 26, nr 4 (2.01.2020): 649–57. http://dx.doi.org/10.1108/rpj-08-2019-0211.

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Purpose X-Ray-computed micro-tomography (micro-CT) is relatively well established in additive manufacturing as a method to determine the porosity and geometry of printed parts and, in some cases, the presence of inclusions or contamination. This paper aims to demonstrate that micro-CT can also be used to quantitatively analyse the homogeneity of micro-composite parts, in this case created using laser sintering (LS). Design/methodology/approach LS specimens were manufactured in polyamide 12 with and without incorporation of a silver phosphate glass additive in different sizes. The specimens were scanned using micro-CT to characterise both their porosity and the homogeneity of dispersion of the additive throughout the volume. Findings This work showed that it was possible to use micro-CT to determine information related to both porosity and additive dispersion from the same scan. Analysis of the pores revealed the overall porosity of the printed parts, with linear elastic fracture mechanics used to identify any pores likely to lead to premature failure of the parts. Analysis of the additive was found to be possible above a certain size of particle, with the size distribution used to identify any agglomeration of the silver phosphate glass. The particle positions were also used to determine the complete spatial randomness of the additive as a quantitative measure of the dispersion. Practical implications This shows that micro-CT is an effective method of identifying both porosity and additive agglomeration within printed parts, meaning it can be used for quality control of micro-composites and to validate the homogeneity of the polymer/additive mixture prior to printing. Originality/value This is believed to be the first instance of micro-CT being used to identify and analyse the distribution of an additive within a laser sintered part.
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Rozprawy doktorskie na temat "Micro-CT"

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Gao, Bo. "Multigrid reconstruction of micro-CT data". Thesis, KTH, Skolan för teknik och hälsa (STH), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-211180.

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The group of Medical Imaging at School of Health and Technology is developing a micro-CT scanner for small animal imaging. Micro-CT refers to reconstructing CT image with resolution in scale of micrometer, and this goal is achieved by acquiring projection data with high resolution. Nevertheless, high resolution projection data and high resolution recon- struction image have introduced the problem of memory insufficiency, as more points need to be processed during micro-CT reconstruction. For this reason, this paper has investigated how to alleviate the burden on computers memory through applying multi-grid reconstruction algo- rithms, which means to reconstruct region of interest (ROI) with high resolution while reconstructing background with lower resolution. By do- ing that, pixels being considered in the reconstruction space has been decreased and normal computers will be capable to handle reconstruction of micro-CT image. Through testing on numerical data (Shepp Logan Phantom), it can be concluded that multi-grid reconstruction algorithm could reconstruct high fidelity ROI with much faster speed comparing to full resolution reconstruction. Moreover, this proposed technique can also give decent reconstruction to data acquired from micro-CT scanner.
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Sen, Sharma Kriti. "Compressed Sensing based Micro-CT Methods and Applications". Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/52866.

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High-resolution micro computed tomography (micro-CT) offers 3D image resolution of 1 um for non-destructive evaluation of various samples. However, the micro-CT performance is limited by several factors. Primarily, scan time is extremely long, and sample dimension is restricted by the x-ray beam and the detector size. The latter is the cause for the well-known interior problem. Recent advancement in image reconstruction, spurred by the advent of compressed sensing (CS) theory in 2006 and interior tomography theory since 2007, offers great reduction in the number of views and an increment in the volume of samples, while maintaining reconstruction accuracy. Yet, for a number of reasons, traditional filtered back-projection based reconstruction methods remain the de facto standard on all manufactured scanners. This work demonstrates that CS based global and interior reconstruction methods can enhance the imaging capability of micro-CT scanners. First, CS based few-view reconstruction methods have been developed for use with data from a real micro-CT scanner. By achieving high quality few-view reconstruction, the new approach is able to reduce micro-CT scan time to up to 1/8th of the time required by the conventional protocol. Next, two new reconstruction techniques have been developed that allow accurate interior reconstruction using just a limited number of global scout views as additional information. The techniques represent a significant progress relative to the previous methods that assume a fully sampled global scan. Of the two methods, the second method uses CS techniques and does not place any restrictions on scanning geometry. Finally, analytic and iterative reconstruction methods have been developed for enlargement of the field of view for the interior scan with a small detector. The idea is that truncated projections are acquired in an offset detector geometry, and the reconstruction procedure is performed through the use of a weighting function / weighted iteration updates, and projection completion. The CS based reconstruction yields the highest image quality in the numerical simulation. Yet, some limitations of the CS based techniques are observed in case of real data with various imperfect properties. In all the studies, physical micro-CT phantoms have been designed and utilized for performance analysis. Also, important guidelines are suggested for future improvements.
Ph. D.
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Sharma, Yash. "Automated fibre segmentation in micro CT images of paper". Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50044.

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Characterizing the structure of paper products made from Northern Bleached Softwood Kraft (NBSK) pulp after Low Consistency refining is a vital step to understanding the strengthening mechanisms of NBSK fibres as well as the effect of refining on the fibre morphology. X-ray micro tomographic (µCT) imaging coupled with advanced image analysis enables the characterization of the internal structure of paper at a very high resolution in 3D. In this work, a novel algorithm has been developed to isolate individual papermaking fibres in µCT images of paper handsheets as a first step to characterize the paper structure. The three step fibre segmentation algorithm segments the papermaking fibres by (i) tracking the hollow inside the fibres via a modified connected component methodology, (ii) extracting the fibre walls using a distance transform and (iii) labeling the fibres through collapsed sections by a final refinement step. Further, post processing algorithms have been developed to calculate the length, coarseness and relative bonded area of the fibres thus segmented. The algorithms have been validated by segmenting hollow aluminum tubes in test geometry similar in complexity to the paper structure. The capabilities and limitations of the algorithms have been evaluated by segmenting 2484 papermaking fibres within a 1mm x 1mm handsheet sample manufactured from NBSK pulp. The Fibre Segmentation algorithm is the first ever reported method for the automated and robust segmentation of the tortuous 3D morphology of papermaking fibres within 3D images of paper handsheets. The segmented structure thus obtained provides the capabilities to calculate several important properties of paper. The fibre segmentation algorithm is a unique and powerful tool to analyze the paper structure and provide novel insights into the papermaking process.
Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate
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Zainon, Rafidah Binti. "Spectral Micro-CT Imaging of Ex Vivo Atherosclerotic Plaque". Thesis, University of Canterbury. Physics and Astronomy, 2012. http://hdl.handle.net/10092/7165.

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The goal of this research was to demonstrate the potential of spectral CT for the discrimination of vulnerable atherosclerotic plaques. It was proposed that spectral CT has the potential to identify the presence of specific markers for vulnerable plaques: iron deposits and lipid core. A spectral micro-CT system incorporating the latest Medipix spectroscopic photon- counting detectors was commissioned for this purpose. Using spectroscopic methods developed with this system, it was possible to distinguish the presence of iron deposits and lipid core within ex vivo atherosclerotic plaques. Atherosclerosis or hardening of arteries is a systemic disease of the vessel wall that occurs in the aorta, carotid, coronary and peripheral arteries. It is characterised by the deposition of calcified plaques on the innermost layer of the artery wall. Vulnerable plaques are unstable, prone to rupture and put the person at risk of cardiovascular events and strokes. Factors that may lead to plaque instability are lipid content and iron deposits. This preclinical study is a precursor to the development of a clinical technique that will enable vulnerable atherosclerotic plaques to be identified in vivo prior to treatment or removal. Following a preliminary study on atherosclerotic plaques with a prototype system, the MARS-CT3 spectral micro-CT system incorporating Medipix3 was developed and commissioned for further plaque studies. The spectral CT data sets acquired by this system were assessed visually for morphology and analysed for material composition using a linear algebra method. The results were correlated with photography and histology (the histology is the current gold standard). The presence of iron and lipid can be differentiated from the background soft-tissue using a linear algebra method. However the quantification of iron in the presence of calcium is not currently possible without additional data or constraints. Nevertheless the presence of iron deposits within the plaques can be distinguished in the high resolution MARS-CT images and has been correlated with photographic and histological evidence. Thus, using the high spatial resolution spectral data from MARS-CT, the discrimination of lipid core and iron deposits within ex vivo advanced human atherosclerotic plaques is feasible. This may provide the basis for the development of a clinical technique that will identify vulnerable plaques in vivo by high resolution spectral CT.
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Opie, Alexander M. T. "Contributions to spectral CT". Thesis, University of Canterbury. Electrical and Computer Engineering, 2013. http://hdl.handle.net/10092/8532.

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Spectral x-ray computed tomography (CT) is an important nascent imaging modality with several exciting potential applications. The research presented in this thesis separates into two primary areas with the common underlying theme of spectral CT; the first area is Compton scatter estimation and the second is interior tomography. First, the research is framed and outputs are identified. Background on the concepts used in the thesis is offered, including x-ray imaging and computed tomography, CT scanner architecture, spectral imaging, interior tomography and x-ray scatter. The mathematical background of techniques for image reconstruction from x-ray transmission measurements are presented. Many of the tools used to perform the research, both hardware and software, are described. An algorithm is developed for estimating the intensity of Compton scattered photons within a spectral CT scan, and a major approximation used by the algorithm is analysed. One proposed interior reconstruction algorithm is briefly evaluated; while this is not directly linked to spectral CT, it is related to the work on a novel hybrid spectral interior micro-CT architecture. Conclusions are summarised and suggestions for future work are offered. Scatter is known to cause artefacts in CT reconstructions, and several methods exist to correct data that has been corrupted by scatter. Compton scatter affects the energy of photons, therefore spectral CT measurements offer the potential to correct for this phenomenon more accurately than conventional measurements. A Compton scatter algorithm is developed and is found to match very well to Monte Carlo validation simulations, with the constraints that the object be at the micro-CT scale and that electron-binding effects are omitted. Development of the algorithm uses an approximation of the post-scatter attenuation to simplify the estimation problem and enable implementation. The consequences of this approximation are analysed, and the error introduced is found to be less than 5% in most biomedical micro-CT situations. Interior tomography refers to the incomplete data situation caused by the truncation of some or all CT projections, and is an active research area. A recently proposed interior reconstruction algorithm is evaluated with regard to its sensitivity to input error, and is found to have mediocre performance in this respect. Published results are not found to be reproducible, suggesting some omission from the published algorithm. A novel hybrid spectral interior architecture is described, along with an iterative reconstruction algorithm for hybrid data sets. The system combines a full field of view conventional imaging chain and an interior field of view spectral imaging chain to enable spectral measurement of a region of interest, and addresses some important limitations of spectral x-ray detectors; promising results are shown. Spectral reconstructions from interior data are shown to have sufficient information to distinguish two k-edge contrast agents (iodine and gadolinium) not only within the interior field of view but also beyond it. The architecture is further explored in the context of radiation exposure reduction, including testing of an analytical hybrid reconstruction algorithm.
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Gomes, Mauricio Neves. "Desproteinização do esmalte associada à técnica de remineralização no clareamento em consultório". Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/23/23140/tde-30112011-164218/.

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Objetivo: avaliar cor, brilho, rugosidade e alterações ultraestruturais do esmalte dental clareado com peróxido de hidrogênio a 35 %, submetido ao tratamento prévio com agente desproteinizante, ou ao tratamento posterior com o agente remineralizador fosforopeptídeo de caseína/fosfato de cálcio amorfo (ACP-CPP). Material e Métodos: Os grupos experimentais foram: GC (controle/consultório): H2O2 a 35 % - 4 sessões de 8 min; GE1 (primer+consultório): NaOCl 5,25 % por 1 min, aplicação do H2O2 a 35 % como no GC; e GE2 (consultório+ACP): GC + ACP-CPP diariamente por 7 dias. Fragmentos contendo esmalte e dentina (n=8), obtidos de dentes bovinos, foram utilizados para avaliar cor, brilho e a rugosidade. Alteração de cor (E), parâmetros L* e b* foram determinados com colorímetro e o brilho superficial com glossímetro antes, imediatamente após (1h), 4 e 7 dias após o tratamento. Parâmetros de rugosidades, Ra, Rt e RSm, foram obtidos com perfilômetro de contato antes, imediatamente após o tratamento e 7 dias após os tratamentos. Os resultados de E, brilho superficial e rugosidade foram avaliados separadamente usando ANOVA 2 fatores e teste de Tukey (p=0,05). Para avaliar a alteração ultraestrutural, dentes pré-molares humanos, seccionados nos sentidos vestibulo-lingual e mesio distal foram observados em microscópio eletrônico de varredura, por emissão de campo, e realizada a quantificação de elementos químicos por EDS. Análise tridimensional da estrutura do esmalte foi realizada por microtomografia computadorizada (micro-CT) com resolução 11,24 m (n=8). Foram realizadas análises dos parâmetros estruturais: espessura estrutural (St.Th.), separação estrutural (St.Sp.) e índice de fragmentação (Fr.I.) antes e após os tratamentos em duas regiões: ROI 1= 56,2 m e ROI 2= 110,2 m, ambas a partir da superfície vestibular. Foi utilizado o teste t pareado para análise estatística de cada parâmetro estrutural. Resultados: Não houve diferença estatística entre os diferentes tratamentos de superfície para E, Ra e RSm. Imediatamente após o clareamento (1h) ocorreu maior aumento do L* e queda do brilho superficial que se manteve por 7 dias. O uso de agente desproteinizante em dentes bovinos não acentuou a redução do brilho do esmalte, mas a aplicação de ACP-CPP acarretou em maior perda brilho e aumento nos valores de rugosidade após 7 dias para Rt. A aplicação do agente desproteinizante previamente ao clareamento em dente humano revelou uma superfície mais lisa, sem alterar os parâmetros estruturais. Há uma maior quantidade de cálcio, formação de um manto de recobrimento após aplicação de ACP-CPP em torno dos prismas de esmalte, aumento de St.Th de 4,1m, menor espaçamento entre os cristais de hidroxiapatita e redução de St.Sp em 0,8 m e de Fr.I em 0,01 no ROI-1 após 7 dias. Conclusão: O uso de agente desproteinizante não altera a cor, brilho e a ultraestrutura inorgânica. A aplicação de ACP-CPP após a técnica de clareamento de consultório não contribui para alteração de cor, mas reduz o brilho e altera a ultraestrutura da porção mais externa do esmalte após 7 dias
Purpose: To evaluate color, gloss, roughness and ultrastructural changes of enamel bleached with 35% hydrogen peroxide, subjected to previous treatment with deproteinized agent, or later treatment with remineralizing agent casein phosphopeptide-amorphous calcium phosphate (CPP-ACP). Materials and Methods: The experimental groups were: GC (control + in-office): 35% H2O2 - 4 sessions of 8 min; GE1(primer+in-office): 5.25% NaOCl during 1 min before the application of 35% H2O2 as done in GC, and GE2 (in-office+ACP-CPP): GC + ACP-CPP, daily applied during 7 days. Enamel and dentin blocks (n=8), obtained from bovine tooth, were used to evaluate color, gloss and roughness. Color changes (E), L* and b* parameters were done with a colorimeter and surface gloss with a glossimeter, before, immediately after (1h), 4 and 7 days after treatment. Roughness parameters, Ra, RT and Rsm, were done with a contact perfilometer before, immediately after and 7 days after treatments. ANOVA two-way and Tukeys test were performed to evaluate E, gloss and roughness separately (p=0.05). To access human pre-molar ultrastructural changes, teeth were cross-sectioned buccal-lingual and disto-mesio observed by scanning electron microscope, field emission gun, EDS to quantify chemical elements. Enamel three-dimensional images were analysed with microcomputed tomography (micro-CT) with resolution 11,24m (n=8). Structural parameters were analyzed: structural thickness (St.Th.), structural separation (St.Sp.) and fragmentation index (Fr.I.) before and after treatments in two regions of interest:ROI 1= 56,2m and ROI 2= 110,2 m, both from buccal surface. Paired t-test was done for analyses of each structural parameter. Results: There was no statistical difference among surface treatments to E, Ra and Rsm. Immediately after bleaching (1h) occured highest L* increase and decrease of surface gloss which remained until 7 days. Deproteinized agent applied on bovine tooth not emphasized enamel gloss reduction, but the CPP-ACP has resulted in a higher gloss reduction and roughness increase (Rt parameter) after 7 days. Deproteinized agent application previous to in- office bleaching observed a smooth surface, without structural parameters changes. There is a greater calcium quantity, forming a cover mantle after CPP-ACP application around enamel prisms, St.Th increase of 4,1m, less spacing between hydroxyapatite crystals and reductions of St.Sp of 0,8 m and Fr.I of 0,01 on ROI-1 after 7 days. Conclusion: Application of deproteinized agent does not change bovine enamel color, gloss and human enamel inorganic ultrastructure. CPP-ACP application after in-office bleaching does not contribute to color change, but decrease gloss of bovine enamel and change human enamel outermost ultrastructure portion after 7 days.
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Iglecias, Elaine Faga. "Avaliação qualitativa e quantitativa da instrumentação e obturação de canais radiculares achatados utilizando-se microtomografia computadorizada". Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-19022015-172359/.

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Na Endodontia, a microtomografia (CT) tem sido amplamente utilizada como método de análise tridimensional. Atualmente, três movimentos mecanizados para o preparo do canal radicular tem sido introduzidos na rotina endodôntica, oscilatório, rotatório e recíproco. Existem diferentes sistemas de limas acionadas por motores capazes de realizar esses movimentos. Sendo assim, os objetivos deste trabalho são utilizar a CT para avaliar, em canais mesiais achatados de molares inferiores, a qualidade e modelagem final de preparo do canal radicular, utilizando-se sistemas oscilatório, recíproco e rotatório e avaliar a obturação do canal radicular com cone único ou ondas contínuas de condensação, no que diz respeito ao volume de material obturador e de espaços vazios. Os resultados não mostraram diferença estatísitica significativa no volume de desgaste entre os grupos testados. Para a porcentagem de superfície não tratada os grupos oscilatório e rotatório tocaram mais paredes nos terços cervical e médio do que o grupo recíproco. A técnica de ondas contínuas de condensação e cone único apresentaram preenchimento de obturação semelhantes nos terços médio e apical, sendo que no terço cervical a técnica de ondas contínuas deixou menor porcentagem de espaços vazios.
Endodontics in the microtomography (CT) has been widely used as a method for three-dimensional analysis. Currently, three mechanized movements for root canal preparation has been introduced in endodontic, oscillatory, rotational and reciprocal routine. There are different files systems driven by motors capable of these movements. Thus, the objectives of this work are using CT to evaluate, in flattened mesial canals of mandibular molars, the quality and final modeling of root canal preparation, using oscillatory, reciprocal and rotational systems and evaluate the root canal filling with single cone or continuous waves of condensation, with respect to the volume of filling material and voids. The results showed no significant difference in estatísitica wear volume between the tested groups. For the percentage of untreated surface and the oscillating rotating groups played more walls in the cervical and middle thirds of the reciprocal group. The technique of continuous wave of condensation and single cone showed similar fillings fill in the middle and apical thirds, and in the cervical third of the technique of continuous wave left lower percentage of voids.
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Robertson, Galen Charles. "Quantification of Skeletal Phenotype Using Micro-CT and Mechanical Testing". Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4874.

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With the vast array of genetically altered (knockout) mice becoming available there is a need for quantitative, repeatable, and efficient methodologies to characterize the phenotypic consequences of knocking out specific genes. Since knockout animals often have the ability to compensate for a single missing gene, it is important to examine the structural, material and morphological properties to obtain a thorough understanding of the changes occurring. For this project, femurs of knockout mice were first scanned using microcomputed tomography (micro-CT) to obtain high-resolution images of the trabecular bone in the distal femur, as well as cortical bone in the mid-diaphysis. After scanning, the femurs were tested to destruction in four-point bending at the mid-diaphysis about the medial lateral axis of the femur. These methodologies allowed quantification of (1) morphologic properties such as bone volume fraction, trabecular properties and 2nd moment of the area (2) structural properties such as stiffness, maximum load at failure, and post yield deformation and (3) material properties such as bone mineral density, elastic modulus and yield strength. As part of two independent studies, two different knockout mice, cyclooxygenase-2 (COX-2 -/-) and Apolipoprotein E (APOE -/-), were examined for structure-function relationships using these methodologies. COX-2 knockout mice were found to have decreased mineral content in their femurs, and increased post yield deformation. APOE knockout mice at 10 weeks of age had decreased bone mass and structural properties. However, by 40 weeks of age APOE deficient mice caught up to and exceeded the structural properties and bone mass of their wild type counterparts.
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Cahoon, Lindsey Charlene. "Micro-CT Inspection of Impact Damage in Carbon/Epoxy Rods". BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6350.

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Various configurations of unidirectional carbon/epoxy composite rods were impacted radially, inspected using micro-CT scanning equipment, and tested in axial compression to measure the residual strength after impact. This data was used to correlate the relationship between impact energy, residual strength, and the peak crack area and total crack volume along the length of the specimens. These specimens represent local members of open three-dimensional composite lattice structures (e.g., based on isogrid or IsoTruss® geometries) that are continuously fabricated using advanced three-dimensional braiding techniques. The specimens were radially impacted with 2.5 J (1.9 ft-lbs), 5.0 J (3.7 ft-lbs), 7.5 J (5.6 ft-lbs), 10 J (7.4 ft-lb), 15 J (11 ft-lbs), and 20 J (15 ft-lbs) of energy, and compared to undamaged control specimens. The unidirectional core specimens were 8 mm (5/16") in diameter and were consolidated with various sleeve configurations and materials. Sleeves differed in types (bi-directional braided sleeves or unidirectional spiral wraps), nominal sleeve coverage of the core fibers (full or half), and sleeve material (Nomex Thread or Dunstone Hi-Shrink Tape). The unsupported length of the specimens used in this research was 50.8 mm (2") to ensure a strength-controlled compression failure rather than a failure due to buckling. After impact, the specimens were scanned using a micro-CT scanner at resolutions of 50 and 35 microns and subsequently tested in axial compression. The micro-CT scan images were analyzed to measure the crack areas along the specimen. From this analysis, the peak crack area and total crack volume along the length of the specimen was calculated. Similar to past research, as the impact energy increases, the residual compression-strength-after-impact decreases. As the impact energy increases, specimens with shrink tape sleeves had the largest increase in peak crack area and overall crack volume while specimens with full spiral sleeves had the lowest increase in peak crack area and overall crack volume. A bimodal increase is evident in the peak crack area and total crack volume over the length of the specimen where specimens impacted at 15 J (11 ft-lbs) showed the highest peak crack area across all sleeve types. There is a slight correlation between the increase in peak crack area and overall crack volume and the decrease in residual compression strength after impact. Shrink Tape, while yielding a higher quality specimen with greater compression strength prior to impact, did not protect the specimens against damage due to impact as well as other sleeve types. This was shown by the large decrease in residual compression strength after impact and increase in peak crack area and overall crack volume as the impact energy increased.
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SERRA, FRANCESCA GIULIA. "Bone-like inducing grafts: in vivo and micro-CT analysis". Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2858349.

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Książki na temat "Micro-CT"

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Yu, Zilong, Luo Zhang i Demin Han, red. Micro-CT of Temporal Bone. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0807-0.

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Orhan, Kaan, red. Micro-computed Tomography (micro-CT) in Medicine and Engineering. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-16641-0.

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Han, Demin, Luo Zhang i Zilong Yu. Micro-CT of Temporal Bone. Springer Singapore Pte. Limited, 2021.

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Han, Demin, Luo Zhang i Zilong Yu. Micro-CT of Temporal Bone. Springer, 2022.

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Orhan, Kaan. Micro-Computed Tomography (micro-CT) in Medicine and Engineering. Springer International Publishing AG, 2020.

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Skipworth, James R. A., i Stephen P. Pereira. Pathophysiology, diagnosis, and assessment of acute pancreatitis. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0190.

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The incidence of acute pancreatitis continues to increase, but the attendant mortality has not decreased for >30 years. The pathogenesis remains poorly understood, but the initial mechanism appears to be intracellular activation of pancreatic enzymes, with micro- and macrovascular dysfunction, in conjunction with a systemic inflammatory response acting as a key propagating factor and determinant of severity. A multitude of causes or initiators exist, but there is a common pathophysiological pathway. The use of conventional scoring systems, combined with repeated clinical and laboratory assessment, remain the optimal method of predicting early severity and organ dysfunction. Death occurs in a biphasic pattern with early mortality (<2 weeks) secondary to SIRS and MODS; and late deaths (>2 weeks) due to superinfection of pancreatic necrosis. Assessment of severity should reflect this, with early severity being diagnosed in the presence of organ failure for >48 hours, and late severity defined by the presence of pancreatic and peri-pancreatic complications on CT or other appropriate imaging modalities.
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Części książek na temat "Micro-CT"

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Kachelrieß, Marc. "Micro-CT". W Molecular Imaging I, 23–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-72718-7_2.

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Ngan-Tillard, Dominique J. M., i Dirk J. Huisman. "Micro-CT Scanning". W Archaeological Soil and Sediment Micromorphology, 441–49. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118941065.ch42.

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Eloot, L., N. Buls, I. Willekens, T. Lahoutte i J. de Mey. "Micro-CT Performance Testing". W IFMBE Proceedings, 154–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03879-2_45.

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Orhan, Kaan, Karla de Faria Vasconcelos i Hugo Gaêta-Araujo. "Artifacts in Micro-CT". W Micro-computed Tomography (micro-CT) in Medicine and Engineering, 35–48. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16641-0_4.

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Orhan, Kaan, Bora Akat i Berkan Celikten. "Micro-CT in Dentistry". W Atlas of Dentomaxillofacial Anatomical Imaging, 215–25. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-96840-3_15.

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Nakamura, Shota. "Micro-CT and Lungs". W Multidisciplinary Computational Anatomy, 323–27. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4325-5_43.

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Orhan, Kaan. "Introduction to Micro-CT Imaging". W Micro-computed Tomography (micro-CT) in Medicine and Engineering, 1–5. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16641-0_1.

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Orhan, Kaan, i Arda Büyüksungur. "Fundamentals of Micro-CT Imaging". W Micro-computed Tomography (micro-CT) in Medicine and Engineering, 27–33. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16641-0_3.

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Körmendi, Szandra, Bálint Vecsei, Kaan Orhan i Csaba Dobó-Nagy. "Micro-CT in Osteoporosis Research". W Micro-computed Tomography (micro-CT) in Medicine and Engineering, 87–107. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16641-0_7.

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Şener, Leyla Türker, Gürcan Albeniz, Göker Külüşlü i Işil Albeniz. "Micro-CT in Artificial Tissues". W Micro-computed Tomography (micro-CT) in Medicine and Engineering, 125–37. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16641-0_9.

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Streszczenia konferencji na temat "Micro-CT"

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Prevrhal, Sven. "Quantitative micro-CT". W Optics & Photonics 2005, redaktorzy F. Patrick Doty, H. Bradford Barber i Hans Roehrig. SPIE, 2005. http://dx.doi.org/10.1117/12.625919.

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Tu, Shu-Ju, Hui-Ling Hsieh i Tsi-Chian Chao. "CT number variations in micro CT imaging systems". W Medical Imaging, redaktorzy Jiang Hsieh i Ehsan Samei. SPIE, 2008. http://dx.doi.org/10.1117/12.772160.

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Bruyndonckx, P., A. Sasov, X. Liu, Ian McNulty, Catherine Eyberger i Barry Lai. "Laboratory 3D Micro-XRF∕Micro-CT Imaging System". W THE 10TH INTERNATIONAL CONFERENCE ON X-RAY MICROSCOPY. AIP, 2011. http://dx.doi.org/10.1063/1.3625304.

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Sassov, A. "State of art micro-CT". W Sixth international conference on x-ray microscopy (XRM99). AIP, 2000. http://dx.doi.org/10.1063/1.1291202.

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Ritman, Erik L., Diane R. Eaker i Steven M. Jorgensen. "Micro-CT as a guide for clinical CT development". W SPIE Optics + Photonics, redaktor Ulrich Bonse. SPIE, 2006. http://dx.doi.org/10.1117/12.679490.

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Sasov, Alexander, Xuan Liu i Phil L. Salmon. "Compensation of mechanical inaccuracies in micro-CT and nano-CT". W Optical Engineering + Applications, redaktor Stuart R. Stock. SPIE, 2008. http://dx.doi.org/10.1117/12.793212.

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Grimmer, Rainer, Michael Knaup i Marc Kachelriess. "Jitter-improved sampling in micro-CT". W 2008 IEEE Nuclear Science Symposium and Medical Imaging conference (2008 NSS/MIC). IEEE, 2008. http://dx.doi.org/10.1109/nssmic.2008.4774435.

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Youn, Hanbean, Min Kook Cho, Cheol-Soon Shon, Bong Hae Cho, Chang Hyuk Kim i Ho Kyung Kim. "Clinical micro-CT for dental imaging". W SPIE Medical Imaging, redaktorzy Ehsan Samei i Jiang Hsieh. SPIE, 2009. http://dx.doi.org/10.1117/12.811533.

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Stock, Stuart R., Nalini M. Rajamannan, Ellen R. Brooks, Craig B. Langman i Lauren M. Pachman. "Pathological calcifications studied with micro-CT". W Optical Science and Technology, the SPIE 49th Annual Meeting, redaktor Ulrich Bonse. SPIE, 2004. http://dx.doi.org/10.1117/12.560466.

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Tisato, Nicola, Qi Zhao i Giovanni Grasselli. "Experimental rock physics under micro-CT". W SEG Technical Program Expanded Abstracts 2016. Society of Exploration Geophysicists, 2016. http://dx.doi.org/10.1190/segam2016-13949603.1.

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Raporty organizacyjne na temat "Micro-CT"

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Griego, James J. M., i Philip Noell. Executive Micro-CT Low-resolution Summary for Catheter Parts. Office of Scientific and Technical Information (OSTI), marzec 2020. http://dx.doi.org/10.2172/1605340.

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Noell, Philip, i James Griego. Executive Micro-CT high-resolution Summary for Catheter Part. Office of Scientific and Technical Information (OSTI), styczeń 2021. http://dx.doi.org/10.2172/1763595.

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Young, Steven. Imaging APO-BMI with Micro X-ray Computed Tomography (CT). Office of Scientific and Technical Information (OSTI), marzec 2021. http://dx.doi.org/10.2172/1772371.

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Aarle, Wim van, i Wolfgang Ludwig. X-Ray Diffraction Contrast Tomography in micro-CT Lab Source Systems. Fort Belvoir, VA: Defense Technical Information Center, maj 2014. http://dx.doi.org/10.21236/ada604806.

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Seetho, I., K. Morales, W. White i H. Martz. Summary Statistics for TA_LH03_130815: Micro-CT Data Acquired at LLNL, Specimen 2 of 3. Office of Scientific and Technical Information (OSTI), kwiecień 2014. http://dx.doi.org/10.2172/1133108.

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Seetho, I., K. Morales, W. White i H. Martz. Summary Statistics for TA_LH02_130814: Micro-CT Data Acquired at LLNL, Specimen 1 of 3. Office of Scientific and Technical Information (OSTI), kwiecień 2014. http://dx.doi.org/10.2172/1133109.

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Seetho, I., K. Morales, W. White i H. Martz. Summary Statistics for TA_LT04_130724: Micro-CT Data Acquired at LLNL, Specimen 3 of 3. Office of Scientific and Technical Information (OSTI), kwiecień 2014. http://dx.doi.org/10.2172/1133926.

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Seetho, I., K. Morales, W. White i H. Martz. Summary Statistics for TA_LT02_130722: Micro-CT Data Acquired at LLNL, Specimen 1 of 3. Office of Scientific and Technical Information (OSTI), kwiecień 2014. http://dx.doi.org/10.2172/1133927.

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Seetho, I., K. Morales, W. White i H. Martz. Summary Statistics for TA_LT03_130723: Micro-CT Data Acquired at LLNL, Specimen 2 of 3. Office of Scientific and Technical Information (OSTI), kwiecień 2014. http://dx.doi.org/10.2172/1133928.

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Seetho, I., K. Morales, W. White i H. Martz. Summary Statistics for TA_LH04_130822: Micro-CT Data Acquired at LLNL, Specimen 3 of 3. Office of Scientific and Technical Information (OSTI), kwiecień 2014. http://dx.doi.org/10.2172/1133929.

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