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Relevant bibliographies by topics / Image tube

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Academic literature on the topic 'Image tube'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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Journal articles on the topic "Image tube"

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Mai, Hang-Nga, and Du-Hyeong Lee. "Effects of Exposure Parameters and Voxel Size for Cone-Beam Computed Tomography on the Image Matching Accuracy with an Optical Dental Scan Image: An In Vitro Study." BioMed Research International 2021 (June 10, 2021): 1–6. http://dx.doi.org/10.1155/2021/6971828.

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This study is aimed at assessing the effects of exposure parameters and voxel size for cone-beam computed tomography (CBCT) on the image matching accuracy with an optical dental scan image. CBCT and optical scan images of a dry human mandible were obtained. Different CBCT settings were used: tube voltage, 60, 80, and 100 kVp; tube current, 6 and 8 mA; and voxel size, 100, 200, and 300 μm. Image matching between the CBCT and optical scan images was performed using implant planning software by dental professionals ( n = 18 ). The image matching accuracy in each combination of CBCT settings was evaluated by assessing the linear discrepancy between the three-dimensionally reconstructed radiological image and the registered optical scan image using an image analysis software program. The Kruskal-Wallis test and a post hoc Mann–Whitney U test with Bonferroni correction were used to compare the accuracy of image registration between the groups ( α = 0.05 ). Overall, the image matching accuracy was not significantly different between tube voltage and current settings; however, significantly higher image registration errors were found at the combination of 100 kVp tube voltage/8 mA tube current ( F = 8.44 , P < 0.001 ). Changes in voxel sizes did not significantly interfere with the image registration results. No interaction was found among voltage, current, and voxel size in terms of image registration accuracy ( F = 2.022 , P = 0.091 ). Different exposure parameter settings in tube voltage and tube current did not significantly influence the image matching accuracy between CBCT and optical dental scan images; however, a high radiation dose could be inappropriate. The image matching accuracy was not significantly affected by changing the voxel sizes of CBCT.

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Green, R. E. "Real-Time X-Ray Diffraction For Materials Process Control." MRS Bulletin 13, no. 4 (April 1988): 44–48. http://dx.doi.org/10.1557/s0883769400065891.

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As useful as classical x-ray diffraction techniques have been, the ability to obtain x-ray diffraction images with extremely short exposure rimes opens up new opportunities for materials scientists, including real-time materials process control. This article briefly describes state-of-the-art systems for obtaining extremely rapid and real-time x-ray diffraction images and gives several examples of their applications for materials process control.Two generic electro-optical methods permit real-time viewing and recording of x-ray diffraction images. The first uses a low-intensity conventional x-ray tube source leading to a low-intensity diffraction image, which requires a high-gain electro-optical imaging system. The second uses either a high-intensity rotating anode, synchrotron, or flash x-ray source. Such a high-intensity source produces a high-intensity diffraction image, permitting use of a low-gain high-resolution electro-optical imaging system.Figure 1 schematically shows two types of image intensifier tubes which have been most often used to view x-ray diffraction images. By cascading three individual first generation image tube stages (Figure 1a), light gains as high as several million can be obtained. The second generation microchannel-plate image intensifier tube (Figure 1b) is similar to a single-stage first generation device except for the extremely important addition of a microchannel plate.

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Strauss, Lourens Jochemus, and William ID Rae. "Image quality dependence on image processing software in computed radiography." South African Journal of Radiology 16, no. 2 (June 12, 2012): 44–48. http://dx.doi.org/10.4102/sajr.v16i2.305.

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Background. Image post-processing gives computed radiography (CR) a considerable advantage over film-screen systems. After digitisation of information from CR plates, data are routinely processed using manufacturer-specific software. Agfa CR readers use MUSICA software, and an upgrade with significantly different image appearance was recently released: MUSICA2. Aim. This study quantitatively compares the image quality of images acquired without post-processing (flatfield) with images processed using these two software packages. Methods. Four aspects of image quality were evaluated. An aluminium step-wedge was imaged using constant mA at tube voltages varying from 40 to 117kV. Signal-to-noise ratios (SNRs) and contrast-to-noise Ratios (CNRs) were calculated from all steps. Contrast variation with object size was evaluated with visual assessment of images of a Perspex contrast-detail phantom, and an image quality figure (IQF) was calculated. Resolution was assessed using modulation transfer functions (MTFs). Results. SNRs for MUSICA2 were generally higher than the other two methods. The CNRs were comparable between the two software versions, although MUSICA2 had slightly higher values at lower kV. The flatfield CNR values were better than those for the processed images. All images showed a decrease in CNRs with tube voltage. The contrast-detail measurements showed that both MUSICA programmes improved the contrast of smaller objects. MUSICA2 was found to give the lowest (best) IQF; MTF measurements confirmed this, with values at 3.5 lp/mm of 10% for MUSICA2, 8% for MUSICA and 5% for flatfield. Conclusion. Both MUSICA software packages produced images with better contrast resolution than unprocessed images. MUSICA2 has slightly improved image quality than MUSICA.

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Moore, Craig Steven, Tim Wood, Ged Avery, Steve Balcam, Liam Needler, Hiten Joshi, Najeeb Ahmed, John Saunderson, and Andrew Beavis. "Use of a computer simulator to investigate optimized tube voltage for chest imaging of average patients with a digital radiography (DR) imaging system." British Journal of Radiology 92, no. 1104 (December 2019): 20190470. http://dx.doi.org/10.1259/bjr.20190470.

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Objective: The aim of this study was to investigate via computer simulation a proposed improvement to clinical practice by deriving an optimized tube voltage (kVp) range for digital radiography (DR) chest imaging. Methods: A digitally reconstructed radiograph algorithm was used which was capable of simulating DR chest radiographs containing clinically relevant anatomy. Five experienced image evaluators graded clinical image criteria, i.e. overall quality, rib, lung, hilar, spine, diaphragm and lung nodule in images of 20 patients at tube voltages across the diagnostic energy range. These criteria were scored against corresponding images of the same patient reconstructed at a specific reference kVp. Evaluators were blinded to kVp. Evaluator score for each criterion was modelled with a linear mixed effects algorithm and compared with the score for the reference image. Results: Score was dependent on tube voltage and image criteria in a statistically significant manner for both. Overall quality, hilar, diaphragm and spine criteria performed poorly at low and high tube voltages, peaking at 80–100 kVp. Lung and lung nodule demonstrated little variation. Rib demonstrated superiority at low kVp. Conclusion: A virtual clinical trial has been performed with simulated chest DR images. Results indicate mid-range tube voltages of 80–100 kVp are optimum for average adults. Advances in knowledge: There are currently no specific recommendations for optimized tube voltage parameters for DR chest imaging. This study, validated with images containing realistic anatomical noise, has investigated and recommended an optimal tube voltage range.

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Konuma, H., K. Kuroki, K. Kurosawa, and N. Saitoh. "Low Energy X-Ray Transmission Images by using a Microfocus X-Ray Tube and a be-Window X-Ray Image Intensifier(XRII)." Microscopy and Microanalysis 4, S2 (July 1998): 494–95. http://dx.doi.org/10.1017/s1431927600022595.

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Photographs of x-ray transmission images by x-ray films have been used for observing the inside nondestructively. Further, Imaging Plates(IP) are used for precise measurements of x-ray diffraction patterns. But, these integrating area detectors are not suitable for real time nor time resolved measurements. For real time and time resolved measurements, the X-Ray Image Intensifier(XRII, a large image tube that converts an x-ray image into a visible image) is used for biological x-ray TV systems, x-ray nondestructive inspection systems etc. These TV x-ray image systems require high energy x-rays, x-ray tube voltage of 30 to 150 kV, and show faint contrast for x-ray images of light element substances owing to its low absorption coefficients. However, light elements have intense x-ray absorption coefficients in a low energy x-ray region, x-ray tube voltage of 5 to 20 kV, and give fine contrast for x-ray images of light element substances.

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Papadakis, Antonios E., and John Damilakis. "Evaluation of an organ-based tube current modulation tool in pediatric CT examinations." European Radiology 30, no. 10 (May 20, 2020): 5728–37. http://dx.doi.org/10.1007/s00330-020-06888-5.

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Abstract Objectives To investigate the effect of an organ-based tube current modulation (OTCM) technique on organ absorbed dose and assess image quality in pediatric CT examinations. Methods Four physical anthropomorphic phantoms that represent the average individual as neonate, 1-year-old, 5-year-old, and 10-year-old were used. Standard head and thorax acquisitions were performed with automatic tube current modulation (ATCM) and ATCM+OTCM. Dose calculations were performed by means of Monte Carlo simulations. Radiation dose was measured for superficial and centrally located radiosensitive organs. The angular range of the OTCM exposure window was determined for different tube rotation times (t) by means of a solid-state detector. Image noise was measured as the standard deviation of the Hounsfield unit value in regions of interest drawn at selected anatomical sites. Results ATCM+OTCM resulted in a reduction of radiation dose to all radiosensitive organs. In head, eye lens dose was reduced by up to 13% in ATCM+OTCM compared with ATCM. In thorax, the corresponding reduction for breast dose was up to 10%. The angular range of the OTCM exposure window decreased with t. For t = 0.4 s, the angular range was limited to 74° in head and 135° for thorax. Image noise was significantly increased in ATCM+OTCM acquisitions across most examined phantoms (p < 0.05). Conclusions OTCM reduces radiation dose to exposed radiosensitive organs with the eye lens and breast buds exhibiting the highest dose reduction. The OTCM exposure window is narrowed at short t. An increase in noise is inevitable in images located within the OTCM-activated imaged volume. Key Points • In pediatric CT, organ-based tube current modulation reduces radiation dose to all major primarily exposed radiosensitive organs. • Image noise increases within the organ-based tube current modulation enabled imaged volume. • The angular range of the organ-based tube current modulation low exposure window is reduced with tube rotation time.

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Söderman, M., B. Hansson, and B. Axelsson. "Radiation Dose and Image Quality in Neuroangiography: Effects of Increased Tube Voltage, Added X-Ray Filtration and Antiscatter Grid Removal." Interventional Neuroradiology 4, no. 3 (September 1998): 199–207. http://dx.doi.org/10.1177/159101999800400304.

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During endovascular treatment the patient may be subject to fluoroscopy for long periods as well as multiple x-ray exposures. The radiation dose to the patient can be considerable, and cause local deterministic effects such as alopecia or even skin burn. The potential carcinogenic effects should also be noted, being especially important in the paediatric population. We measured radiation doses to patients and personnel during neuroendovascular procedures and diagnostic neuroangiography. We also tried to reduce the radiation dose to the patient utilising increased tube voltage, additional primary X-ray filtration and by removing the antiscatter grid in front of the image intensifier, employing air gap technique. We investigated radiation doses to patient and personnel during neuroangiographic procedures and optimized the examination technique with regard to radiation dose with maintained image quality. Radiation exposure to patients and personnel was measured with thermoluminescent dosimeters and permanently mounted KermaDose-Area-Product meters in front of the X-ray tubes during 13 cerebral angiographies and six neuroendovascular procedures. We performed experiments with radiation dose measurements and evaluation of image quality with 80 and 90 kV tube voltage during image acquisition and 75 and 85 kV during fluoroscopy, as well as with different primary X-ray filtration. Images from patient studies acquired with the original grid in front of the image intensifier were compared with images from patient studies acquired with the grid removed and air gap technique (30 cm). Images from patient studies acquired with the original examination technique were compared to images from patient studies acquired with increased x-ray tube voltage, increased x-ray filtering and with the antiscatter grid removed using an airgap as scatter reduction method. Radiation exposure to personnel was very low using standard protective devices. Measurable doses were recorded only on the hands and forehead of the neuroradiologist. Maximum entrance skin dose was about 1 Gy on the side of the patientspatient's forehead during an endovascular procedure. Increasing the tube voltage from 75 to 85 – 85 and 90 kV, exchanging the original 0.5 mm aluminium primary filtration for 0.2 mm copper and removing the antiscatter grid allowed us to reduce entrance skin dose to the patient by 70% with unchanged or slightly improved image quality.

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Sawall, S., L. Klein, E. Wehrse, L. T. Rotkopf, C. Amato, J. Maier, H. P. Schlemmer, C. H. Ziener, S. Heinze, and M. Kachelrieß. "Threshold-dependent iodine imaging and spectral separation in a whole-body photon-counting CT system." European Radiology 31, no. 9 (March 13, 2021): 6631–39. http://dx.doi.org/10.1007/s00330-021-07786-0.

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Abstract Objective To evaluate the dual-energy (DE) performance and spectral separation with respect to iodine imaging in a photon-counting CT (PCCT) and compare it to dual-source CT (DSCT) DE imaging. Methods A semi-anthropomorphic phantom extendable with fat rings equipped with iodine vials is measured in an experimental PCCT. The system comprises a PC detector with two energy bins (20 keV, T) and (T, eU) with threshold T and tube voltage U. Measurements using the PCCT are performed at all available tube voltages (80 to 140 kV) and threshold settings (50–90 keV). Further measurements are performed using a conventional energy-integrating DSCT. Spectral separation is quantified as the relative contrast media ratio R between the energy bins and low/high images. Image noise and dose-normalized contrast-to-noise ratio (CNRD) are evaluated in resulting iodine images. All results are validated in a post-mortem angiography study. Results R of the PC detector varies between 1.2 and 2.6 and increases with higher thresholds and higher tube voltage. Reference R of the EI DSCT is found as 2.20 on average overall phantoms. Maximum CNRD in iodine images is found for T = 60/65/70/70 keV for 80/100/120/140 kV. The highest CNRD of the PCCT is obtained using 140 kV and is decreasing with decreasing tube voltage. All results could be confirmed in the post-mortem angiography study. Conclusion Intrinsically acquired DE data are able to provide iodine images similar to conventional DSCT. However, PCCT thresholds should be chosen with respect to tube voltage to maximize image quality in retrospectively derived image sets. Key Points • Photon-counting CT allows for the computation of iodine images with similar quality compared to conventional dual-source dual-energy CT. • Thresholds should be chosen as a function of the tube voltage to maximize iodine contrast-to-noise ratio in derived image sets. • Image quality of retrospectively computed image sets can be maximized using optimized threshold settings.

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Ramdan, Raden Dadan, Deni Suwardhi, and Rochim Suratman. "Prospect of Identification of Different Corrosion Product by Near-IR Photography." Advanced Materials Research 718-720 (July 2013): 1185–90. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.1185.

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The present work is a preliminary work on the development of NIR camera photograph as alternative tool for corrosion product identification. Corrosion products were taken from two different carbon steel tubes side, one is from thinning tube side, the other is from normal tube side. From optical microscope data, it was observed that the thinning tube side surface has elongated microstructure while the other has normal microstructure. It was also observed that more stable oxide in the form of hematite formed on the thinning tube side, while the other side has siderite and magnetite as the corrosion product. From NIR camera photograph on the scale of both tubes side, it was obtained significant differences in the digital image number. It is expected that after further comprehensive collecting digital image number data on the various corrosion product as well as thickness layer, NIR camera photograph can be used as an alternative method for corrosion product identification.

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Guo, Xiang, Xin Su, Yingtao Yuan, Tao Suo, and Yan Liu. "A Novel Method for the Complex Tube System Reconstruction and Measurement." Sensors 21, no. 6 (March 22, 2021): 2207. http://dx.doi.org/10.3390/s21062207.

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Pipe structures are at the base of the entire industry. In the industry structure, heat and vibration are transmitted in each pipe. The minimum distance between each pipe is significant to the security. The assembly error and the deformation of the pipeline positions after multiple runs are significant problems. The reconstruction of the multi-pipe system is a critical technical difficulty in the complex tube system. In this paper, a new method for the multi-pipes structure inspection is presented. Images of the tube system are acquired from several positions. The photogrammetry technology calculates positions, and the necessary coordination of the structure is reconstructed. A convolution neural network is utilized to detect edges of tube-features. The new algorithm for tube identification and reconstruction is presented to extract the tube feature in the image and reconstruct the 3D parameters of all tubes in a multi-pipes structure. The accuracy of the algorithm is verified by simulation experiments. An actual engine of the aircraft is measured to verify the proposed method.

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More sources

Dissertations / Theses on the topic "Image tube"

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Faddy, James M. "Computational modelling for shock tube flows /." [St. Lucia, Qld.], 2000. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16174.pdf.

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Mobini, Tina. "An Evaluation of Kilo Voltage Image Quality Produced by an On-Board Imager System." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175344.

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Syfte: Syftet med detta projekt var att utvärdera kvaliteten på de digitala röntgenbilder som genereras med en On-Board imager® (OBI), monterad på en medicinsk linjäraccelerator på radioterapiavdelningen på Karolinska Universitetssjukhuset. Dessa kilovoltbilder används för att verifiera patientens position på behandlingsbordet, inför behandling, för att reducera risken att friskvävnad bestrålas i onödan. Detta utförs genom en online ortogonal 2D-2D matchningsteknik innan strålningen leveras. Material och metoder: OBI-system, utvecklad av Varian Medical System, erbjuder en protokoll med exponeringsparametrar för att hjälpa användaren att välja lämpliga inställningar för exempelvis lämplig rörström och spänning under bildtagningen de digitala kilovoltbilderna. Under detta projekt skapades flera testbilder tagna med ändrade exponeringsparametrarna i de befintliga protokollen. Dessa testbilders kontrast bedömdes sedan och jämfördes med bilder tagna med de förinställda parametrar från Varians protokoll. Resultat och slutsats: En utvärdering av de experimentella testbilderna, i jämförelse med bilder skapade med det befintliga protokollet, visade att en justering av exponeringsfaktorer inte leder till något signifikant förbättring av bildernas kontrast.
Purpose: The purpose of this project was to evaluate the quality of kilo Voltage- digital radiography images that are provided by an On-Board imager® (OBI) mounted on a medical linear accelerator at the Radiotherapy department of Karolinska University Hospital. The digital kV-images are used to verify patient position on the treatment table, in order to reduce healthy tissue irradiation, using an online orthogonal set of 2D-2D matching technique, before the treatment delivery. Material and methods: The OBI- system elaborated by Varian Medical System offers an exposure factor protocol in order to help users to choice proper exposure factors, as proper tube current and tube voltage, during acquisition of kV-images. In this project several test images were performed by changing the exposure factors. Further the test images quality regarding, quality index contrast, was assessed and compared with the image performed by the existent Varian protocol. Result and Conclusion: Evaluation of the tests images shows that changing of the exposure factors doesn’t result in any significant improvement of kV-images contrast as compared to images created with the existent protocols parameters.

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Chiu, Sam Hsieh-Hsiang. "Using an expansion tube to generate rarefied hypervelocity gas flows /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18701.pdf.

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Stewart, Benjamin S. "Predicted scramjet testing capabilities of the proposed RHYFL-X expansion tube /." [St. Lucia, Qld], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18241.pdf.

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Abdel-Jawad, Madhat. "Stability assessment of planetary entry vehicles in the X3 superorbital expansion tube /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18440.pdf.

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Hover, Eyre D. "The investigation of tube sampling disturbance using transparent soil and particle image velocimetry." Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/65103/.

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A small-scale physical modelling system was developed and employed to investigate the effects of tube sampling. Amorphous silica and an oil blend of matching refractive index were mixed to form a transparent soil. Black glass beads were embedded within the soil body on the vertical central plane. After consolidation in a Perspex box, a glass model sampler was pushed into the transparent soil. Movements within the soil body were recorded using digital photography; these images were later analysed by Particle Image Velocimetry. The centreline strain path (CSP) of the sample during tube penetration was calculated and compared to existing analytical and numerical models’ strain predictions, and some degree of correlation was observed. However, it is shown that the CSP is not constant throughout the sample, but varies with depth below the base of the borehole. It was also noticed that after tube penetration, significant residual extensive strains remain for soil on the centreline of the specimen. Different tube geometries were tested and a correlation was found between strain magnitudes and the Area Ratio, Inside Clearance Ratio and the Outer Cutting Edge Taper Angle. It was also found that samples taken in normally consolidated soils were more heavily disturbed than those in lightly overconsolidated soils. After removal from the soil model, samples were stored for six months and volumetric strains within them, set up by a redistribution of pore fluid pressures, were found to be small, typically less than 1%. Soil at the edge of the sampler wall reduced in volume, while the centre swelled. Specimens were thereafter extruded from the sampling tube and the strain path created by this step was quantified. It was found that extrusion compresses the soil while still inside the tube, with soil closest to the extruder more significantly affected. All of these parts of the sampling process contribute to the overall sample disturbance and can therefore have an effect on the sample’s measured properties.

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Crook, Amy L. "Assessment of the tube suction test for identifying non-frost-susceptible soils stabilized with cement /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1576.pdf.

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Carlson, Bailey McKay. "Generation and Analysis of Streamwise Vortices from Vortex Tube Apparatus." Thesis, North Dakota State University, 2020. https://hdl.handle.net/10365/31783.

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A pressurized vortex tube is used to generate streamwise vortices in a wind tunnel and the resulting flow behavior is analyzed. The apparatus is intended to verify computational data from the AFRL by offering a method of conducting real-world counterpart experiments. The apparatus design process and other considered approaches are discussed. The vortex tube is operated at pressures of 20, 30 and 40 psi while the wind tunnel is operated at 3, 5, 10 and 20% capacity. Flow measurements are performed using particle image velocimetry to observe vortices and freestream interactions from which velocity and vorticity data is comparatively analyzed. Results indicate that vortex velocity greater than freestream flow velocity is a primary factor in maintaining vortex structures further downstream, while increased supply pressure and reduced freestream velocity also reduce vortex dissipation rate. A brief analysis of the vortex interaction with a downstream airfoil is presented to support future work.

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Bradshaw, James R. "The Role of Pax3 in Neuronal Differentiation of the Ophthalmic (OpV) Trigeminal Placode and Neural Tube during Chicken Embryonic Development." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1208.pdf.

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Mayer, William. "O you tube e a memória: que audiovisual emerge do banco de dados?" Universidade do Vale do Rio dos Sinos, 2013. http://www.repositorio.jesuita.org.br/handle/UNISINOS/3707.

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CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico
Esta dissertação tem como objetivo analisar o Banco de Dados do site de compartilhamento de vídeos YouTube através de um olhar arqueológico para os meios de comunicação, e a inserção do audiovisual neste ambiente proposto por Foucault (2008), buscando entender como o Banco de Dados, através de sua estrutura de repositório em constante movimento, modifica o audiovisual dentro do site. Para isso, a pesquisa busca compreender os conceitos de "arquivo" e "enunciação", também propostos por Foucault, assim como conceitos específicos que permeiam as mídias digitais, tais como softwares, interfaces e hiperlinks. A dissertação também mergulha nas proposições de McLuhan (1964) dos meios como extensões do homem, propondo o computador como extensão do cérebro; movimento que nos leva ao conceito de Imagem-Corpo, que sugere que a verdadeira imagem está entre a percepção humana e o objeto em si, portanto, só existe no diálogo entre corpo e imagem. Aprimora-se esta ideia através de uma metodologia que denominamos como carto-cerebral, método que procura identificar os observáveis no site, a partir de um processo de busca realizado por afecção, segundo as proposições de Hansen (2004) apoiado em Bergson, onde optamos por objetos que nos afetam. Este processo é guiado por palavras-chave que realizam a interconexão entre os diferentes observáveis. Ao invés de focar unicamente nos vídeos do site, identificamos ferramentas que compõem este diferente audiovisual no YouTube. Dentre as quais, destacam-se as diferentes possibilidades provenientes do software, a interação do usuário com a máquina, assim como o próprio modo que o Banco de Dados se organiza. Esta análise cartográfica identifica pontos capazes de enunciar qual Banco de Dados do YouTube está surgindo. O conceito de "embodied", proposto por Hansen (2004), assim como os estudos de McLuhan (1964) são impreteríveis na organização da metodologia, permitindo compreender a ligação entre o Banco de Dados e a memória, conduzindo assim a pesquisa para a análise que pode observar não somente os vídeos dentro do YouTube, mas todos os seus potentes, permitindo emergir um outro audiovisual através do Banco de Dados. Um Banco de Dados como extensão da memória, que é capaz de, a partir de pequenas enunciações, colocar o arquivo em movimento, produzindo parte de um que surge com experiência audiovisual. Gerando uma Youtubidade que pode ser percebida nos diferentes objetos analisados. Construindo, através de distintas enunciações, alguns enunciados que tornam-se parte do discurso na análise final.
This thesis aims to analyze the database of video-sharing site YouTube, through an archeologic look for the medium, and the insertion of the audiovisual in this environment proposed by Foucault (2008), seeking to understand how the database, through its repository structure in constant motion, modifies the audiovisual within the site. The research tries to understand the concepts of "file" and "utterance" also proposed by Foucault, as well as the specific concepts that permeate the digital media, such as software, interfaces, and hyperlinks. The paper also delves into McLuhan (1964) propositions of media as a man extension, proposing the computer as an extension of the brain; movement that leads us to the concept of Body-Image, which suggests that the true picture of image is between human perception and object itself, therefore, it exists only in the dialogue between body and image. This idea is improved up through a methodology that we call brain-cartography, a method that seeks to identify the observable on the site from a search process conducted by the affection, according to the propositions of Hansen (2004), supported by Bergson, where we chose objects that affect us. This process is driven by keywords that perform this interconnection between different observables. Rather than focusing solely on the videos from the site, we identified all the tools that make this different audiovisual on YouTube. Among which, we highlight different possibilities from the software, user interaction with the machine, as well as the very way that the database is organized. This cartographic analysis identifies points capable of stating which database is emerging from YouTube, making it possible to understand a little more about the interaction between the database and the website. The concept of embodied proposed by Hansen (2004), as well as McLuhan (1964) studies are unavoidable in the methodology organization, allowing us to understand the connection between the database and memory, thus, leading the search for the analysis which cannot observe only the videos within YouTube, but all their potent, allowing it to emerge through a new audiovisual database. A database as an extension of memory, which is capable of, from small utterances, put the file in motion, producing part of an audiovisual experience that comes with generating a Youtubity that can be perceived in different objects analyzed. Building through distinct utterances, some statements that become part of the discourse in the final analysis.

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Books on the topic "Image tube"

1

Csorba, Illes P. Image tubes. Indianapolis, Ind., U.S.A: H.W. Sams, 1985.

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Compton, Kenneth. Image performance in CRT displays. Bellingham, WA: SPIE Press, 2003.

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Image performance in CRT displays. Bellingham, Wash: SPIE Press, 2003.

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Understanding close-up photography: Creative close encounters with or without a macro Lens. New York: Amphoto Books, 2009.

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Stoppees' Guide to Photography and Light. San Diego: Elsevier Science, 2008.

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Janet, Stoppee, ed. Stoppees' guide to photography and light: What digital photographers, illustrators, and creative professionals must know. Amsterdam: Elsevier/Focal Press, 2009.

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Dailey, Denton J. Electronics for Guitarists. 2nd ed. New York, NY: Springer New York, 2013.

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Segal, D., P. Kral, and M. Shapiro. Theory, experiment and applications of tubular image states. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533046.013.22.

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This article presents a detailed theoretical description of tubular image states (TIS) around different tube geometries, along with their applications. It begins with a discussion of the theoretical background for the existence of TIS in conjunction with infinitely long homogeneous carbon nanotubes, finite and inhomogeneous nanotubes, and nanotubes arrays. It then considers the lifetimes and stability of TIS, along with the states’ tunability by external fields and the onset of chaos in TIS. In particular, it examines how TIS can be manipulated by means of electric and magnetic fields. It also describes nano-Paul traps of single electrons based on TIS and concludes with an assessment of recent experiments on TIS.

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Alkhalifah, Khaled. The effect of x-ray tube anode and filter materials on image quality and breast dose in mammography. 1995.

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United States. National Aeronautics and Space Administration., ed. Multi-dimensional measurements of combustion species in flame tube and sector gas turbine combustors. [Washington, DC]: National Aeronautics and Space Administration, 1996.

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Book chapters on the topic "Image tube"

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Palma, Douglas A. "PEG Tube Placement." In Veterinary Image-Guided Interventions, 163–78. Oxford: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118910924.ch16.

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Holmes, Elaine. "Percutaneous Cystostomy Tube." In Veterinary Image-Guided Interventions, 423–26. Oxford: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118910924.ch41.

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Taslakian, Bedros. "Percutaneous Feeding Tube Replacement." In Procedural Dictations in Image-Guided Intervention, 113–16. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40845-3_29.

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Pock, Thomas, Reinhard Beichel, and Horst Bischof. "A Novel Robust Tube Detection Filter for 3D Centerline Extraction." In Image Analysis, 481–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11499145_49.

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Taslakian, Bedros. "Nasal/Oral Feeding Tube Insertion." In Procedural Dictations in Image-Guided Intervention, 101–4. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40845-3_26.

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Reimann, Theresa Maria. "Flow Chamber Assay to Image the Response of FRET-Based Nanosensors in Pollen Tubes to Changes in Medium Composition." In Pollen and Pollen Tube Biology, 257–73. New York, NY: Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0672-8_19.

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Zhang, Huanwen. "Elimination of Dynamic Flash in a Picosecond Streak Image Tube." In Springer Series in Chemical Physics, 137–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82918-5_39.

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Yasuba, Chihiro, Syoji Kobashi, Katsuya Kondo, Yutaka Hata, Seturo Imawaki, and Makoto Ishikawa. "Finding a Non-continuous Tube by Fuzzy Inference for Segmenting the MR Cholangiography Image." In Medical Image Computing and Computer-Assisted Intervention — MICCAI 2002, 28–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45787-9_4.

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Castriconi, Roberta, Giovanni Mettivier, and Paolo Russo. "Image Quality and Radiation Dose in Propagation Based Phase Contrast Mammography with a Microfocus X-ray Tube: A Phantom Study." In Breast Imaging, 618–24. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41546-8_77.

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Maltz, Jonathan S., Jens Fuerst, Ajay Paidi, Franz Fadler, Ali R. Bani-Hashemi, and Frank Sprenger. "STATIONARY-GANTRY TOMOSYNTHESIS SYSTEM FOR ON-LINE IMAGE GUIDANCE IN RADIATION THERAPY BASED ON A 52-SOURCE COLD CATHODE X-RAY TUBE." In IFMBE Proceedings, 624–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03474-9_175.

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Conference papers on the topic "Image tube"

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Shakhramanyan, N. A. "Hybrid image converter tube." In Twenty-Third International Congress on High-Speed Photography and Photonics, edited by Valentina P. Degtyareva, Mikhail A. Monastyrski, Mikhail Y. Schelev, and Alexander V. Smirnov. SPIE, 1999. http://dx.doi.org/10.1117/12.350477.

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Niu, H., and H. Zhang. "A Picosecond Streak Image Tube." In 16th International Congress on High Speed Photography and Photonics, edited by Michel L. Andre and Manfred Hugenschmidt. SPIE, 1985. http://dx.doi.org/10.1117/12.967994.

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Schelev, Mikhail Y. "High-speed image-tube photography." In 26th International Congress on High-Speed Photography and Photonics, edited by Dennis L. Paisley, Stuart Kleinfelder, Donald R. Snyder, and Brian J. Thompson. SPIE, 2005. http://dx.doi.org/10.1117/12.570406.

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V'yugina, T. S., V. M. Shilkina, T. A. Il'yina, M. I. Krutik, V. B. Lebedev, V. P. Seleznev, B. M. Stepanov, V. N. Syrtse, and G. G. Fel'dman. "Image Converter Tube For Subnanosecond Photography." In 16th International Congress on High Speed Photography and Photonics, edited by Michel L. Andre and Manfred Hugenschmidt. SPIE, 1985. http://dx.doi.org/10.1117/12.967919.

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Lowrance, J. L., A. D. Cope, and C. R. Stergis. "Magnetic Focus MCP Image Tube Evaluation." In 33rd Annual Techincal Symposium, edited by Robert E. Huffman. SPIE, 1989. http://dx.doi.org/10.1117/12.962547.

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Heller, Franz, U. M. Mayer, Th Fickenscher, and Bernard Schmauss. "Ophthalmoscope with microchannel image intensifier tube." In BiOS Europe '95, edited by Stefan Andersson-Engels, Mario Corti, Ivan Kertesz, Norbert Kroo, Heinz P. Weber, Terence A. King, Riccardo Pratesi, and Stefan Seeger. SPIE, 1996. http://dx.doi.org/10.1117/12.229524.

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Bryukhnevich, G. I., V. M. Zhilkina, V. P. Simonov, V. N. Syrtzev, G. G. Feldman, D. M. Zlotnikov, Yu M. Gorbulin, and V. A. Skoryupin. "Wide-Range X-Ray Image Converter Tube With Image Scanning." In 18th Intl Congress on High Speed Photography and Photonics, edited by DaHeng Wang. SPIE, 1989. http://dx.doi.org/10.1117/12.969110.

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Lapington, J. S., J. R. Howorth, and J. S. Milnes. "A reconfigurable image tube using an external electronic image readout." In Optics & Photonics 2005, edited by Randolph E. Longshore. SPIE, 2005. http://dx.doi.org/10.1117/12.616732.

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Lapington, Jonathan S. "Investigation of image nonlinearities in a photon counting image tube." In Garmisch - DL tentative, edited by Guy Cerutti-Maori and Philippe Roussel. SPIE, 1994. http://dx.doi.org/10.1117/12.185295.

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Niu, H., H. Zhang, X. H. Wang, Q. L. Yang, Y. P. Liu, Y. C. Wang, Y. A. Reng, and J. L. Zhou. "A New Picosecond Synchroscan Streak Image Tube." In 18th Intl Congress on High Speed Photography and Photonics, edited by DaHeng Wang. SPIE, 1989. http://dx.doi.org/10.1117/12.969147.

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Reports on the topic "Image tube"

1

Vine, B. H. (Manufacturing of the 40/30 mm gated image intensifier tube). Office of Scientific and Technical Information (OSTI), April 1990. http://dx.doi.org/10.2172/6812775.

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Wales, Jesse G., and Peter L. Marasco. Assessment of an Optically Stimulated Infrared Emission From Image Intensifier Tube Photocathodes. Fort Belvoir, VA: Defense Technical Information Center, October 2005. http://dx.doi.org/10.21236/ada442754.

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K. Y. Ng. Betatron tune shifts and Laslett image coefficients. Office of Scientific and Technical Information (OSTI), July 2001. http://dx.doi.org/10.2172/783072.

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