Letteratura scientifica selezionata sul tema "Imagerie de la cavitation"
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Articoli di riviste sul tema "Imagerie de la cavitation":
Rouleau, Philippe, e Bruno Kastler. "Imagerie neuroradiologique, imagerie traumatologique et imagerie ostéo-articulaire en milieu tropical". Journal de Radiologie 89, n. 10 (ottobre 2008): 1521. http://dx.doi.org/10.1016/s0221-0363(08)76681-2.
Luciani, Alain, Charles-André Cuénod e Olivier Lucidarme. "Imagerie cancérologique : imagerie hybride, imagerie fonctionnelle, staging tumoral et développements récents". Journal de Radiologie 90, n. 10 (ottobre 2009): 1260. http://dx.doi.org/10.1016/s0221-0363(09)75036-x.
Veillon, F., J. L. Stierle, J. Dussaix, L. Ramos-Taboada e S. Riehm. "Imagerie de l’otospongiose : confrontation clinique et imagerie". Journal de Radiologie 87, n. 11 (novembre 2006): 1756–64. http://dx.doi.org/10.1016/s0221-0363(06)74157-9.
Tranquart, F. "Imagerie ultrasonore haute résolution et imagerie volumique". Journal de Radiologie 87, n. 12 (dicembre 2006): 1919. http://dx.doi.org/10.1016/s0221-0363(06)74177-4.
Adamsbaum, Catherine, Alain Couture e Sylviane Hanquinet. "Imagerie pédiatrique". Journal de Radiologie 85, n. 9 (settembre 2004): 1290. http://dx.doi.org/10.1016/s0221-0363(04)76939-5.
Adamsbaum, Catherine, Hubert Ducou Le Pointe e Chantal Durand. "Imagerie pédiatrique". Journal de Radiologie 85, n. 9 (settembre 2004): 1347. http://dx.doi.org/10.1016/s0221-0363(04)77123-1.
Boudghène-Stambouli, Frank, e Bernard Van Beers. "Imagerie hépatique". Journal de Radiologie 85, n. 9 (settembre 2004): 1381. http://dx.doi.org/10.1016/s0221-0363(04)77234-0.
Adamsbaum, Catherine. "Imagerie Pédiatrique". Journal de Radiologie 88, n. 10 (ottobre 2007): 1376. http://dx.doi.org/10.1016/s0221-0363(07)81075-4.
Cotton, Anne. "Imagerie musculosquelettique". Journal de Radiologie 88, n. 10 (ottobre 2007): 1385. http://dx.doi.org/10.1016/s0221-0363(07)81115-2.
Moulin, Guy. "Imagerie ORL". Journal de Radiologie 88, n. 10 (ottobre 2007): 1445. http://dx.doi.org/10.1016/s0221-0363(07)81362-x.
Tesi sul tema "Imagerie de la cavitation":
Gateau, Jérôme. "Imagerie ultrasonore ultrarapide d'évènements de cavitation : application en thérapie par ultrasons et imagerie de détection". Phd thesis, Université Paris-Diderot - Paris VII, 2011. http://pastel.archives-ouvertes.fr/pastel-00863591.
Gâteau, Jérôme. "Imagerie ultrasonore ultrarapide d'événements de cavitation : application en thérapie par ultrasons et imagerie de détection". Paris 7, 2011. http://www.theses.fr/2011PA077013.
The onset of cavitation activity in an aqueous medium is linked to the formation of gas/vapour-filled cavities of micrometric size. This formation can be acoustically mediated and is then called acoustic bubble nucleation. We focus here in the activation of seed nucléi by short (a few cycles) and high amplitude ultrasonic excitation (order of magnitude MPa). Bubbles are generated during the rarefaction phase of the wave and are transient (they dissolve). The nucleation properties of biological tissues are little known. However, they can be assessed using ultrasound: the formation of a bubble results in the appearance of a new scatterer (which can be detected with a pulse-écho detection), and each cavitation event generates an acoustic emission (detected with passive reception). In n this PhD manuscript, we use ultrafast ultrasound imaging (simultaneous acquisition on an array of transducers with a high frame rate) to detect cavitation events. Two in vitro applications were first validated. On one hand, bubble nucleation was performed through a human skull, and transcranial passive detection of a single cavitation event was used in a time reversal process to optimize adaptive focusing for thermal therapy of brain tissue. On the other hand, the formation and dissolution of bubbles in scattering biological tissues (muscle) were detected with a high sensitivity by combining passive detection and ultrafast active imaging. Finally, in vivo experiments on sheep's brain, and others in vitro on animal blood showed that nucleation in biological tissue is a random phenomenon, and high negative pressure are mandatory to initiate nucleation in vivo (< -12MPa)
Mandroyan, Audrey. "Caractérisation de l'hydrodynamique et de la cavitation dans un réacteur utilisé pour la sonoélectrochimie". Besançon, 2006. http://www.theses.fr/2006BESA2023.
Previous studies have shown positive effects induced by ultrasound during chemical processes. They allow envisaging a large application field for power ultrasound at low frequencies (from 20 to 60 kHz) as well as at high frequencies (from 100 to 1 MHz). In the particular case of industrial electrochemical processes, ultrasound and their effects are difficult to managed, due to numerous phenomena which are caused by the wave propagation in a liquid and especially the acoustic flows and the cavitation in the liquid bulk and at a solid surface. It's is important to note that the distribution of this activity is not homogeneous within the reactor, leading to difficulty in process control. So, the optimisation of sonoelectrochemistry processes needs a good knowledge of both acoustic flow distribution and cavitation, which are essential parameters. The aim of this PhD thesis was to obtain reliable elements for the sonoelectrochemistry systems characterization. This work takes interest in the study of interactions between the hydrodynamic phenomena, the cavitation and the electrochemical reactions, what will allow understanding the mechanisms and their limits. The ultrasonic activity characterization was implemented by several methods, as the calorimetric power measurements, the Fricke’s dosimetry, the mass transfer measurements, the laser tomography, the PIV and chronoamperometry. A systematic study was carried out for all these methods. Thus it has been possible to estimate the reactor geometry influence, the ultrasound beam diameter influence or the frequency influence on the hydrodynamic flows induced by ultrasound and on the cavitation phenomenon at the surface electrode
Polichetti, Maxime. "Traitement d’antenne adaptatif pour l’imagerie ultrasonore passive de la cavitation". Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1176/document.
This work focuses on the spatio-temporal monitoring of acoustic cavitation by ultrasonic imaging. This is a complex physical phenomenon used in some ultrasound therapy techniques, corresponding to the formation of gas bubbles that oscillate and implode. Initially, the TD-PAM (Time Domain Passive Acoustic Mapping) method was developed to map cavitation activity from acoustic signals emitted by bubbles, passively recorded by a linear ultrasonic imaging probe. However, the TD-PAM suffers from too low resolution and many reconstruction artifacts. In addition, it is time-consuming because it is formalized in the time domain (TD). To overcome these two limitations, it is proposed to study, compare and develop advanced methods of passive ultrasound imaging. This manuscript is structured around three main contributions: An original adaptive method has been formalised in the time domain, based on the amplitude compression of ultrasonic signals by root pth: TD-pPAM. This approach improves the resolution and contrast of cavitation maps for a computing time equivalent to the TD-PAM. The notion of cross-spectral density matrix has been introduced for cavitation imaging. Four Fourier domain (FD) methods were therefore studied and compared: FD-PAM (non-adaptive), Capon Robuste FD-RCB (adaptive, by optimization), Functional Beamforming FD-FB (adaptive, by non-linear compression) and MUltiple Signal Classification FD-MUSIC (adaptive, by subspaces projection). The performance of these FD methods was studied experimentally in vitro in water tank with a comparison by optical imaging. The proposed adaptive FD methods have demonstrated their potential to improve the spatial and temporal tracking of bubbles. The FD-RCB offers a superior localization to the FD-PAM but suffers from a high algorithmic complexity. The performance of the FD-FB is intermediate to that of the FD-PAM and the FD-RCB, for a calculation complexity equivalent to the FD-PAM. The FD-MUSIC has the potential to highlight weak acoustic sources, but does not keep their relative quantifications
Sivadon, Audrey. "Contributions à l’imagerie passive de la cavitation ultrasonore : formation de voies adaptatives en 3D et extension spatiale de nuages de bulles". Electronic Thesis or Diss., Lyon 1, 2022. http://www.theses.fr/2022LYO10172.
Passive imaging relies on beamforming algorithms that require large aperture probes to provide good axial resolutions; however, in 3D passive imaging, the matrix probes currently marketed do not meet this constraint. Moreover, these probes have a large number of elements, which makes their use particularly unwieldy. This thesis work focuses on the study and improvement of passive cavitation imaging by addressing two aspects in particular: (i) the practical and efficient implementation of 3D passive imaging, (ii) the problem of imaging large sources such as cavitation clouds. We have combined the application of sparse methods (to reduce the number of active elements of the probe used) and the transposition from 2D to 3D of adaptive algorithms in the frequency domain. This formalism uses the robust estimation of the inter-spectral density matrix (CSM) and allowed us to implement simply and efficiently different algorithms: Delay-And-Sum (DAS), Robust-Capon-Beamformer and Pisarenko. The efficiency of these algorithms in 3D has been tested in terms of width to half height, contrast and position error, on a point source in simulations and on a point reflector in experiments. Finally, in order to address the reality of cavitation clouds, we have investigated the behavior of these reconstruction methods in the case of extended sources. Our 2D simulations show the evolution of the reconstructed images as a function of the cavitation cloud characteristics. This work provides a concrete solution for a simple implementation of 3D passive imaging as well as answers to the expectations on the localization and characterization of a cavitation cloud
Yon, Jérôme. "Jet Diesel haute presssion en champ proche et lointain : Etude par imagerie". Phd thesis, Université de Rouen, 2003. http://tel.archives-ouvertes.fr/tel-00005366.
Cornu, Corentin. "Caractérisation et régulation des régimes de cavitation ultrasonore pour la sonoporation cellulaire". Electronic Thesis or Diss., Lyon, 2018. http://www.theses.fr/2018LYSE1121.
In the aim of limiting the destructive behavior of collapsing cavitation bubbles, an exclusively stable cavitation state is targeted for sensitive therapeutics applications like blood-brain barrier opening. Ensuring a stable cavitation regime is complex because of (i) the coexistence of stably oscillating bubbles and collapsing bubbles in the same bubble cloud, and (ii) the stochastic behavior of the phenomenon during time. Therefore, it is necessary to control spatially and temporally the cavitation activity, by discriminating the stable from the inertial regime. Firstly, the theoretical study of the dynamics of a monodisperse and homogeneous cloud shows a modification of the stable cavitation threshold as a function of the bubble density: the subharmonics emission threshold is lowered and the resonance frequency is shifted. The study leads also to the expression of a particular microbubbles density leading to optimized subharmonics emission. Secondly, a real-time control strategy based on a feedback loop process on subharmonics emission is designed. The use of this strategy allows discriminating the two cavitation states during time, and ensures a better reproducibility, time-stability and an acoustic energy gain. The control device is used for cells sonoporation in-vitro. In a first study, the sonoporation by inertial cavitation control is performed in a stationary ultrasonic field configuration. This leads to high sonoporation efficiency coupled to the possibility of counterbalancing the use of supplementary nuclei (encapsulated microbubbles). In a second one, the stable cavitation control applied in a focused ultrasound configuration field pinpoints the possibility of sonoporating cells without inertial cavitation, and then to limit cell lysis
Ceccato, Paul. "Microplasma de cavitation en milieu fluide condensé : application à la purification de l'eau". Phd thesis, Ecole Polytechnique X, 2009. http://pastel.archives-ouvertes.fr/pastel-00005680.
Yon, Jérôme. "Jet diesel haute pression en champ proche et lointain : étude par imagerie". Rouen, 2003. http://www.theses.fr/2003ROUES038.
The aim of the experimental study presented in this thesis is to improve the understanding of the atomization processes involved in a high injection pressure Diesel jet (up to 100 MPa, direct injection). The real Diesel jet structure and the processes involved are not yet fully understood. The great variety of models found in the literature confirms this state of affairs. This lack of knowledge is due to the difficulty of analyzing the Diesel jet caused by its optical density and the size of its characteristic scales of time ("1 ms) and space ("100 æm). During the work carried out for this thesis, new diagnostics based on image processing have been developed in order to analyze the phenomena occurring in the nozzle near field (first millimeters of the jet) and in the far field (spray formed at a long distance from the nozzle). Using several tomographic configurations with an unfocused imaging system, coupled with a shadowgraph imaging setup it was possible to observe, in the near field, cylindrical cavitation pockets located near the jet interface and to drawn a new model of the Diesel jet's internal structure. An entropic calculation applied to three-state-pictures (continuous liquid phase, dispersed liquid phase and gaseous phase) allows us to observe the evolution of a surface linked to the primary atomization. The morphological statistical analysis of the continuous liquid phase interface also enables us to describe the ligament detachment of the dense liquid jet as a function of the injection time and pressure
Ahyi, Ayayi Claude. "Développement dun système d'imagerie ultra-rapide : application aux études de rayonnement et de diffusion acoustique". Lille 1, 1997. http://www.theses.fr/1997LIL10116.
Libri sul tema "Imagerie de la cavitation":
Lecoffre, Yves, M. M. Oberai e V. H. Arakeri. Cavitation. London: Routledge, 2021. http://dx.doi.org/10.1201/9781315138916.
Young, F. Ronald. Cavitation. London: McGraw-Hill, 1989.
Wan, Mingxi, Yi Feng e Gail ter Haar, a cura di. Cavitation in Biomedicine. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-7255-6.
Shah, Y. T., A. B. Pandit e V. S. Moholkar. Cavitation Reaction Engineering. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4787-7.
Lecoffre, Yves. Cavitation: Bubble trackers. Rotterdam, Netherlands: Balkema, 1999.
Shah, Yatish T. Cavitation reaction engineering. New York: Kluwer Academic/Plenum Publishers, 1999.
Margulis, M. A. Sonochemistry and cavitation. Australia: Gordon and Breach Publishers, 1995.
Cabrera, E., V. Espert e F. Martínez, a cura di. Hydraulic Machinery and Cavitation. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9.
Brennen, Christopher E. Cavitation and bubble dynamics. New York: Oxford University Press, 1995.
(2001), Journées françaises de radiologie. Imagerie du coude. Montpellier: Sauramps médical, 2003.
Capitoli di libri sul tema "Imagerie de la cavitation":
Chahine, Georges L., Jean-Pierre Franc e Ayat Karimi. "Cavitation and Cavitation Erosion". In Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction, 3–20. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8539-6_1.
Rennels, Donald C., e Hobart M. Hudson. "Cavitation". In Pipe Flow, 219–24. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118275276.ch20.
Kuttruff, Heinrich. "Cavitation". In Ultrasonics, 363–94. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3846-8_13.
Sandström, Rolf. "Cavitation". In Basic Modeling and Theory of Creep of Metallic Materials, 185–203. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-49507-6_10.
Lauterborn, Werner. "Cavitation". In Encyclopedia of Acoustics, 263–70. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470172513.ch25.
Silverton, Craig D., e Paul Dougherty. "Cavitation". In Encyclopedia of Trauma Care, 300–302. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29613-0_370.
Gooch, Jan W. "Cavitation". In Encyclopedic Dictionary of Polymers, 880. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13336.
Yedidiah, Sam. "Cavitation". In Centrifugal Pump User’s Guidebook, 33–44. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1217-8_5.
Hailu, Getu, Michal Varchola e Peter Hlbocan. "Cavitation". In Design of Hydrodynamic Machines, 163–84. New York: CRC Press, 2022. http://dx.doi.org/10.1201/9781003007142-7.
Das, Sarit Kumar, e Dhiman Chatterjee. "Cavitation". In Vapor Liquid Two Phase Flow and Phase Change, 97–132. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-20924-6_5.
Atti di convegni sul tema "Imagerie de la cavitation":
Duong, Alan. "Optical Flow Measurement of Cavitation in a Converging-Diverging Nozzle Using High-Speed Imagery". In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-54172.
Gonschior, Timo, David Konstantin Tilcher, Antonia Heinrich e Paul Uwe Thamsen. "High-Speed-Imaging-Supported Investigation of the Acoustics of Cavitation in an Industrial Centrifugal Pump". In ASME 2022 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/fedsm2022-87430.
Price, Jeffery R., Kathy W. Hylton, Kenneth W. Tobin, Jr., Philip R. Bingham, John D. Hunn e John R. Haines. "Detection of cavitation pits on steel surfaces using SEM imagery". In Quality Control by Artificial Vision, a cura di Kenneth W. Tobin, Jr. e Fabrice Meriaudeau. SPIE, 2003. http://dx.doi.org/10.1117/12.515154.
Hennequin, Laurent. "Techniques alternatives en imagerie". In 64ème Congrès de la SFCO, a cura di S. Boisramé, S. Cousty, J. C. Deschaumes, V. Descroix, L. Devoize, P. Lesclous, C. Mauprivez e T. Fortin. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/sfco/20166401002.
Fortin, T. "Imagerie et chirurgie guidée". In 56ème Congrès de la SFMBCB. Les Ulis, France: EDP Sciences, 2011. http://dx.doi.org/10.1051/sfmbcb/20115601006.
Ducou Le Pointe, Hubert. "Radiodiagnostic et imagerie médicale". In Rayonnements et médecine. Les Ulis, France: EDP Sciences, 2017. http://dx.doi.org/10.1051/jtsfen/2017ray02.
Hajji, Hafedh, Sylvain Gouillon e Denis Bonicel. "Imagerie SAR pour l'étude des processus côtiers". In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 1998. http://dx.doi.org/10.5150/jngcgc.1998.026-h.
Bodard, AG, M. Fabris, S. Vere-Goulet e A. Dessouter. "Imagerie tridimensionnelle et chirurgie orale : planifier pour simplifier". In 60ème Congrès de la SFCO, a cura di S. Cousty, J. C. Deschaumes, V. Descroix, T. Fortin, J. C. Harnet, P. Lesclous, C. Mauprivez e Y. Roche. Les Ulis, France: EDP Sciences, 2013. http://dx.doi.org/10.1051/sfmbcb/20136003004.
Hû, Olivier, Christine Cavaro-Ménard e Lindsey Roberts. "Evaluation subjective des algorithmes d'interpolation de zoom en imagerie médicale". In the 2012 Conference. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2652574.2653448.
LAFON, Virginie, Anaïs HOAREAU, Cyril MALLET e Jean-François DESPRATS. "Suivi du trait de côte en Aquitaine par imagerie Formosat-2". In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2010. http://dx.doi.org/10.5150/jngcgc.2010.058-l.
Rapporti di organizzazioni sul tema "Imagerie de la cavitation":
Fadaie, K. Information géographique - Imagerie et données rectangulaires. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/219712.
West, C. D. "Cavitation in a Mercury Target". Office of Scientific and Technical Information (OSTI), settembre 2000. http://dx.doi.org/10.2172/885870.
Tullis, J. P. Cavitation guide for control valves. Office of Scientific and Technical Information (OSTI), aprile 1993. http://dx.doi.org/10.2172/10155405.
Buttler, William Tillman. FICH: Feature instability cavitation history. Office of Scientific and Technical Information (OSTI), marzo 2020. http://dx.doi.org/10.2172/1603958.
West, C. D. Cavitation in a Mercury Target. Office of Scientific and Technical Information (OSTI), settembre 2000. http://dx.doi.org/10.2172/763224.
Sokolow, Adam, e Chad Hovey. A Phenomenological Model for Cavitation. Office of Scientific and Technical Information (OSTI), dicembre 2020. http://dx.doi.org/10.2172/1810237.
Pease, Leonard F. Drag Reducing and Cavitation Resistant Coatings. Office of Scientific and Technical Information (OSTI), dicembre 2016. http://dx.doi.org/10.2172/1419158.
Ceccio, Steven L. Dynamics of Cavitation on Rotating Propulsors. Fort Belvoir, VA: Defense Technical Information Center, gennaio 2003. http://dx.doi.org/10.21236/ada416939.
West, C. D. Cavitation Bubble Nucleation by Energetic Particles. Office of Scientific and Technical Information (OSTI), dicembre 1998. http://dx.doi.org/10.2172/2687.
Sollars, Ryan, e Alfred D. Beitelman. Cavitation-Resistant Coatings for Hydropower Turbines. Fort Belvoir, VA: Defense Technical Information Center, giugno 2011. http://dx.doi.org/10.21236/ada545717.